Automatic impurity removing and classifying method and device for radix angelicae

Abstract

The invention relates to the technical field of traditional Chinese medicinal material processing, solves the problem that when an impurity removing device cleans and dredges sieve pores, the impurity removing device can penetrate through the sieve pores to damage the surface of an internal radix angelicae medicinal material, and particularly discloses an automatic impurity removing and classifying method and device for radix angelicae. A roller screen impurity removing and classifying device is arranged at the outlet end of the feeding lifting mechanism and provided with a feeding hopper, a first roller screen is arranged at the discharging end of the feeding hopper, a second roller screen is connected to the end of the first roller screen, and the first roller screen and the second roller screen are connected with the device shell through supporting springs and supporting frames. The first roller screen is provided with material slag screen holes, and the second roller screen is provided with specification classification screen holes. The method comprises the steps of raw material conveying, first-stage screening, material slag conveying, second-stage screening, conveying according to specifications, screen hole cleaning and the like. The device is used for surface impurity removal and size specification classification of radix angelicae, and the impurity removal effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of Chinese medicinal material processing, in particular to an automatic angelica dahurica cleaning and sorting method and a sorting device. Background Art

[0002] The main medicinal part of Angelica dahurica is its dried root. The root of Angelica dahurica is long conical, thick, with blunt quadrangular or nearly circular root head, gray-brown or yellow-brown surface, and many large lenticel-like transverse protrusions, slightly arranged in several vertical rows. It is hard and heavy, white in cross section, powdery, and branched, which makes it different from other medicinal materials in appearance. The root of Angelica dahurica contains a variety of active ingredients, such as volatile oils, coumarin compounds, etc. These ingredients have a variety of pharmacological effects, which provide the basis for the medicinal value of Angelica dahurica.

[0003] The screening and impurity removal process of Angelica dahurica is one of the important steps to ensure the quality of the medicinal material. After the Angelica dahurica is selected, cleaned and dried, it needs to be screened again to remove fine mud, debris and impurities to ensure the purity of the medicinal material. In addition, Angelica dahurica also requires different subsequent processing steps for different sizes and specifications, such as slicing and cutting. Therefore, different specifications of Angelica dahurica must be separated and stored to facilitate subsequent batch processing.

[0004] The screening equipment in the prior art usually consists of two sets of equipment, one for debris removal screening and the other for size specification screening. This requires transfer and transportation between the two sets of equipment in order to proceed to the next step of processing, which affects the processing efficiency and requires additional transportation costs, reducing economic benefits. Summary of the invention

[0005] In order to solve the problem in the prior art that impurities in the cleaning device may pass through the sieve holes and damage the surface of the Angelica dahurica medicinal material inside when cleaning and unblocking the sieve holes, the present invention provides an automatic impurity cleaning and sorting method and a sorting device for Angelica dahurica.

[0006] The technical solution adopted by the present invention is:

[0007] An automatic radix angelicae scabrae classification method comprises the following steps:

[0008] S100, placing the Angelica dahurica raw material on the feeding belt at the bottom of the feeding and lifting mechanism, starting the feeding and lifting mechanism, and continuously lifting the Angelica dahurica raw material to above the feed hopper, so that the Angelica dahurica raw material falls into the first rolling screen through the feed hopper, and in the lifting process of the feeding and lifting mechanism, the surface of the accumulated raw material is flattened by the flattening mechanism;

[0009] S200, starting the first roller screen, the second roller screen and the dredging and cleaning mechanism, the first roller screen rotates to cause the Angelica dahurica raw material therein to rub and collide, and the impurities attached to the Angelica dahurica raw material fall off due to the friction and collision, are screened out through the slag sieve holes on the first roller screen and fall into the slag conveying mechanism below, and are transported and collected by the slag conveying mechanism; during the screening process, the slag sieve holes and the specification classification sieve holes are blocked and dredged from the inside to the outside through the dredging and cleaning mechanism;

[0010] S300, the Angelica dahurica raw material after the impurities are screened out by the first roller screen enters the second roller screen, and the raw material with a size smaller than the maximum diameter of the specification classification sieve hole is screened out through the specification classification sieve hole on the second roller screen, and falls into the second discharging conveying mechanism below after passing through the air selection and dropping mechanism for conveying and unified collection;

[0011] S400, the Angelica dahurica raw material retained in the second roller screen after screening by the second roller screen is discharged through the outlet end of the second roller screen, and after passing through the air separation and dropping mechanism, falls into the first discharging conveying mechanism below for conveying and unified collection, thereby completing the cleaning and classification of the Angelica dahurica raw material.

[0012] Furthermore, the method of using the unblocking and cleaning mechanism to unblock the slag sieve holes and the specification classification sieve holes in S200 includes the following steps:

[0013] S201, respectively measuring the adjacent spacings of the slag sieve holes and the specification classification sieve holes on the first roller screen and the second roller screen, taking a group of axial holes arranged in a direction parallel to the central axis of the roller screen and a group of circumferential holes distributed in a circle along the circumferential direction of the roller screen surface, taking the center point of the hole as the measuring point, and measuring the spacings between the center points of two adjacent axial holes and the circumferential holes;

[0014] S202, obtaining the spacing measured in S201, and adjusting the spacing between the multiple cleaning parts on the walking dredging assembly so that the spacing between adjacent cleaning parts on the two groups of walking dredging assemblies and the spacing between adjacent holes on the first roller screen and the second roller screen are respectively equal in the axial direction and the circumferential direction;

[0015] S203, through the connection support of the mechanism hoisting bracket of the dredging and cleaning mechanism, the cleaning slide rail is set at the top of the first roller screen and the second roller screen, and the two sets of walking dredging components are respectively installed on the cleaning slide rails in the first roller screen and the second roller screen, so that the cleaning parts used for dredging and cleaning on the walking dredging components are in contact with the inner walls of the first roller screen and the second roller screen, and the walking dredging components are allowed to slide along the cleaning slide rails in a contact state;

[0016] S204, obtaining the spacing measured in S201 to adjust the walking time, walking speed, and walking interval dwell time of the two groups of walking dredging components respectively, so that the walking dredging components stay at a new position after each walking distance, and the cleaning parts correspond to the sieve holes at the new positions one by one, and the dwelling time at the new position needs to be sufficient to ensure that the cleaning parts are in contact with all the circumferential sieve holes at the corresponding positions for at least one round;

[0017] S205. The initial positions of the walking and unblocking components are respectively set at the corresponding positions at one end of the sieve hole distribution surface of the first roller screen and the second roller screen, and the cleaning parts are set in one-to-one correspondence with the positions of the sieve holes. After the first roller screen and the second roller screen start to rotate, the two groups of walking and unblocking components are started to unblock the blocked holes of the rotating first roller screen and the second roller screen from the inside to the outside. After the walking and unblocking components stay at the initial position for the time preset in S204, they start to walk and stay along the cleaning slide rail for the preset time. The cleaning parts are alternately in contact with the inner wall and the sieve holes of the rotating roller screen. When sliding relatively on the inner wall of the roller screen, the cleaning parts store energy through spring compression. When reaching the sieve hole position, the cleaning parts release energy through the spring to impact and unblock the blockage, until they reach the corresponding position at the other end of the sieve hole distribution surface of the roller screen, and the walking and unblocking components move in the opposite direction and reciprocate to clean and unblock.

[0018] Furthermore, in S200, a method of measuring the impurities screened out is used to determine the degree of impurity removal. After the degree of impurity removal reaches the requirement, the Angelica dahurica raw material is input into the second rolling screen. Specifically, the method of determining the degree of impurity removal is as follows:

[0019] A gravity sensor is installed on the slag conveying mechanism to obtain the gravity information of the slag impurities screened out during the screening process. Let G(t) be the gravity value that changes with time t, which represents the gravity accumulated by the impurities on the conveying mechanism over time. In the screening time period T, the total gravity of the impurities accumulated is G i (t end )for:

[0020]

[0021] Among them, t end is the end time point of the integration within the screening time period T, and t is the integration variable;

[0022] Cleaning completion rate R(t end )for:

[0023]

[0024] Among them, G total is the total weight of the Angelica dahurica raw material before screening;

[0025] For R(t end) is derived to obtain the first-order derivative R'(t end ) and the second-order derivative R”(t end ), then R(t end ) is the function curvature K(t end )for:

[0026]

[0027] K(t end ) is dK(t end ) / dt end , K(t end ) reflects the cumulative change trend of the gravity of impurities collected during the cleaning process. end ) is close to 0, and it is considered that the cleaning completion rate R(t end ) tends to be stable around this time point, assuming K(t end )’s rate of change takes the point threshold as ∈, and takes dK(t end ) / dt end ≤∈, calculate the cleaning completion rate R(t') at that time point and compare it with the preset standard cleaning completion rate R standard For comparison, when R(t')≥R standard , it is judged that the cleaning is completed.

[0028] An automatic angelica cleaning and sorting device comprises a feeding and lifting mechanism, wherein a roller screen cleaning and sorting device is arranged at the outlet end of the feeding and lifting mechanism, wherein a feed hopper cooperating with the feeding and lifting mechanism is arranged inside the roller screen cleaning and sorting device, wherein a first roller screen is arranged at the outlet end of the feed hopper, wherein a second roller screen is connected to the end of the first roller screen, wherein the first roller screen and the second roller screen are both arranged inside the roller screen cleaning and sorting device, wherein the first roller screen and the second roller screen are connected to the inner wall of the outer shell of the roller screen cleaning and sorting device via a supporting spring and a supporting frame, wherein slag sieve holes are arranged on the first roller screen, wherein specification classification sieve holes are arranged on the second roller screen, wherein the maximum aperture of the slag sieve holes is smaller than the maximum aperture of the size specification sieve holes, and wherein a first discharging conveying mechanism is arranged below the outlet end of the second roller screen.

[0029] Furthermore, the bottoms of the first roller screen and the second roller screen are respectively connected to the first lower hopper and the second lower hopper, a slag conveying mechanism for conveying slag to the outside of the equipment is arranged below the first lower hopper, and a second discharge conveying mechanism is arranged below the second lower hopper, and the second discharge conveying mechanism is used to convey the material discharged by the second roller screen to the outside of the equipment.

[0030] Furthermore, the outlet ends of the first discharging conveying mechanism and the second discharging conveying mechanism are respectively provided with air separation and blanking mechanisms, a blower is provided in the air separation and blanking mechanisms, and the air separation and blanking mechanisms are respectively provided with an air separation inlet, an air separation outlet and an air separation slag outlet.

[0031] Furthermore, the feeding and lifting mechanism includes a feeding belt roller, a feeding belt is arranged on the feeding belt roller, a plurality of feeding and lifting grids are formed by a plurality of dividing strips arranged on the feeding belt, a flat material mechanism is arranged above one end of the feeding belt close to the bottom end of the feeding and lifting mechanism, the flat material mechanism includes a flat material rotating shaft arranged on the feeding and lifting mechanism, the flat material rotating shaft is connected to a flat material motor, a flat material scraper is arranged on the flat material rotating shaft, and the edge of the flat material scraper is arranged in an arc shape.

[0032] Furthermore, a dredging and cleaning mechanism is provided on the inner wall of the equipment casing, and the dredging and cleaning mechanism includes a mechanism hanging bracket connected to the inner wall of the equipment casing, the mechanism hanging bracket is connected to a mechanism supporting chassis, the mechanism supporting chassis is arranged in the first roller screen and the second roller screen, and the mechanism supporting chassis is connected to a cleaning slide rail, the cross-section of the cleaning slide rail is square, and a walking dredging assembly is sleeved on the cleaning slide rail, and a sieve hole dredging piece is provided on the walking dredging assembly, and the sieve hole dredging piece contacts the inner walls of the first roller screen and the second roller screen and acts on the slag sieve holes and the specification classification sieve holes from the inside to the outside, and the outer cover of the walking dredging assembly is provided with a protective barrier cover, and the protective barrier cover is connected to the mechanism supporting chassis.

[0033] Furthermore, the walking dredging assembly includes a walking support sleeve slidably arranged on the cleaning slide rail, the walking support sleeve is connected to a sieve hole dredging piece, the sieve hole dredging piece includes a base, a mounting groove is opened in the base, a dredging spring is arranged in the mounting groove, the end of the dredging spring facing the inner wall of the first roller screen and the second roller screen is connected to a dredging cone for cleaning and dredging blockages of the slag sieve holes and the specification classification sieve holes by releasing the potential energy of the spring, and the walking support sleeve is also connected to a pneumatic nozzle, and the pneumatic nozzle is connected to an air supply hose that can move with the pneumatic nozzle.

[0034] Furthermore, the dredging cone includes a curved guide section connected to the dredging spring and a blockage contact section connected to the end of the curved guide section. The surfaces of the curved guide section and the blockage contact section are tangent at the connection point. The curved guide section is used to provide a guiding force for movement and contraction toward the side where the spring is located when the dredging cone contacts the inner wall of the slag screen hole and the specification classification screen hole.

[0035] The beneficial effects of the present invention are:

[0036] The automatic angelica dahurica cleaning and classification device of the present invention has two-stage rolling screens, which respectively have the functions of cleaning and classification. When the angelica dahurica raw materials are put into the loading and lifting mechanism, and the loading and lifting mechanism lifts the raw materials to the upper feed hopper, the raw materials fall through the feed hopper and enter the first rolling screen. The aperture size of the slag sieve holes arranged on the first rolling screen is smaller than the size of a single angelica dahurica raw material, so that impurities such as mud and dust that fall off when the raw materials collide with each other can be screened out. After the impurities are screened out through the slag sieve holes, the remaining angelica dahurica raw materials enter the second rolling screen. The aperture size of the specification classification sieve holes arranged on the surface of the second rolling screen is larger than the aperture size of the slag sieve holes, so that the angelica dahurica raw materials can be screened out. The small-sized Angelica dahurica medicinal materials are collected, while the large-sized Angelica dahurica medicinal materials that remain in the second roller screen after size screening are discharged from the outlet end of the second roller screen and fall into the first discharging conveying mechanism below for conveying and collection. The device can complete the two steps of cleaning and classification by the same equipment, and the processing process is automatic and continuous. The material residue and Angelica dahurica of different sizes can be effectively separated, and batch processing is possible, with large processing capacity and high efficiency. Compared with the prior art that uses two devices for separate processing, it saves the time of intermediate conveying, collecting, transferring and other steps, and saves costs.

[0037] The automatic clearing and classification method for Angelica dahurica of the present invention unclogs and dredges the residue sieve holes and the specification classification sieve holes from the inside to the outside through a dredging and cleaning mechanism, which can avoid damaging the surface of the Angelica dahurica medicinal material, thereby protecting the product and ensuring the processing quality. Compared with the prior art of dredging from the outside to the inside, it can avoid squeezing the clogging impurities back into the sieve cylinder, preventing the impurities from continuing to clog the sieve holes during subsequent screening processes, thereby achieving a more thorough cleaning and dredging effect, and significantly improving the cleaning effect and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is the overall structure diagram of the device of the present invention;

[0039] Figure 2 It is an internal structure diagram of the rolling screen cleaning and sorting equipment of the present invention;

[0040] Figure 3 for Figure 1 A top view of

[0041] Figure 4 It is a structural diagram of the rolling screen and the dredging and cleaning mechanism of the present invention;

[0042] Figure 5 for Figure 4 Side view of

[0043] Figure 6 An enlarged view of the dredging and cleaning mechanism of the present invention;

[0044] Figure 7It is a diagram of the internal combination structure of the dredging and cleaning mechanism and the rolling screen of the present invention;

[0045] Figure 8 for Figure 7 A magnified view of the mid-travel dredging assembly;

[0046] Fig. 9 It is a structural shape diagram of the dredging cone of the present invention.

[0047] Reference numerals:

[0048] 1- feeding and lifting mechanism, 2- rolling screen cleaning and classification equipment, 3- feeding hopper, 4- first rolling screen, 5- second rolling screen, 6- slag screen hole, 7- specification classification screen hole, 8- first discharging conveying mechanism, 9- first lower hopper, 10- second lower hopper, 11- slag conveying mechanism, 12- second discharging conveying mechanism, 13- feeding belt roller, 14- feeding belt, 15- leveling mechanism, 16- leveling scraper;

[0049] 17-unclogging and cleaning mechanism, 18-mechanism lifting bracket, 19-mechanism supporting chassis, 20-cleaning slide rail, 21-traveling unclogging component, 22-protective barrier cover, 23-sieve hole unclogging piece, 24-base, 25-unclogging spring, 26-unclogging cone, 27-air pressure nozzle, 28-curved guide section, 29-blockage contact section. DETAILED DESCRIPTION

[0050] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0051] The present invention is an automatic cleaning and classification method and classification device for Angelica dahurica, which is mainly used to clean impurities and classify the raw materials of Angelica dahurica medicinal materials by size and specification. It has the characteristics of continuous cleaning and classification by a set of equipment, which can improve the processing efficiency. At the same time, it has a dredging and cleaning component for the rolling screen, which can dredge the sieve holes from the inside to the outside to avoid damaging the medicinal materials. Specifically, the present invention can be implemented as follows:

[0052] Example 1

[0053] This embodiment is a basic implementation plan of the automatic cleaning and sorting device for Angelica dahurica. Please refer to Figure 1In order to solve the problem that two sets of equipment are used for the two steps of cleaning and specification classification, and transportation is required between the process steps to affect the processing efficiency, the device of this embodiment includes a feeding and lifting mechanism 1, and a roller screen cleaning and classification device 2 is arranged at the outlet end of the feeding and lifting mechanism 1. A feeding hopper 3 cooperating with the feeding and lifting mechanism 1 is arranged in the roller screen cleaning and classification device 2, and a first roller screen 4 is arranged at the discharge end of the feed hopper 3. The end of the first roller screen 4 is connected to the second roller screen 5. The first roller screen 4 and the second roller screen 5 are connected to the inner wall of the outer shell of the roller screen cleaning and classification device 2 through a supporting spring and a supporting frame. The first roller screen 4 is provided with a slag screen hole 6, and the second roller screen 5 is provided with a specification classification screen hole 7. The maximum aperture of the slag screen hole 6 is smaller than the maximum aperture of the size specification screen hole, and a first discharging conveying mechanism 8 is arranged below the outlet end of the second roller screen 5.

[0054] When the Angelica dahurica raw material is put into the loading and lifting mechanism 1 and lifted to the upper feed hopper 3 by the loading and lifting mechanism 1, the raw material falls through the feed hopper 3 and enters the first rolling screen 4. The aperture size of the slag sieve hole 6 arranged on the first rolling screen 4 is smaller than the size of a single Angelica dahurica raw material, so the impurities such as mud, dust and dirt that fall off when the raw materials collide with each other can be screened out. After the impurities are screened out through the slag sieve hole 6, the remaining Angelica dahurica raw material enters the second rolling screen 5. The aperture size of the specification classification sieve hole 7 arranged on the surface of the second rolling screen 5 is larger than that of the slag sieve hole 6, so the Angelica dahurica medicinal materials of small size can be screened out for collection, while the large size and specifications that remain in the second rolling screen 5 after size and specification screening The Angelica dahurica medicinal material is discharged from the outlet end of the second roller screen 5 and falls into the first discharging conveying mechanism 8 below for conveying and collection; for the transportation of raw materials between the first roller screen 4 and the second roller screen 5, it can be selected and set according to some roller screen working modes in the prior art. For example, wind feeding is used to send the cleaned raw materials from the first roller screen 4 to the second roller screen 5, or a bottom inclined support feeding method is used to make the raw materials fall from the first roller screen 4 to the second roller screen 5 under the action of gravity. A spiral blade feeding method can also be used to transport the raw materials to the second roller screen 5 by spiral conveying. The specific implementation can be directly selected by those skilled in the art in combination with the existing technology and processing requirements.

[0055] Example 2

[0056] This example is an implementation scheme based on Example 1. Please refer to Figure 1-Figure 3In order to solve the problem that the screened impurities and the screened Angelica dahurica raw materials of small size can be transported and collected separately, in this embodiment, the first lower hopper 9 and the second lower hopper 10 are connected to the bottom of the first roller screen 4 and the second roller screen 5 respectively. A slag conveying mechanism 11 for conveying slag to the outside of the equipment is arranged below the first lower hopper 9, and a second discharging conveying mechanism 12 is arranged below the second lower hopper 10. The second discharging conveying mechanism 12 is used to convey the material screened and discharged by the second roller screen 5 to the outside of the equipment. The screened slag falls into the slag conveying mechanism 11 through the first lower hopper 9, and the screened Angelica dahurica raw materials of small size fall into the second discharging conveying mechanism 12 below through the second hopper. The conveying mechanisms of the two conveying mechanisms can be set in opposite directions, and convey to the outside of the equipment from two directions respectively, so as to facilitate the separate collection and processing of the conveyed objects.

[0057] As a preferred embodiment, in order to further sort the Angelica dahurica raw material and further remove some of the remaining impurities, the outlet ends of the first discharging conveying mechanism 8 and the second discharging conveying mechanism 12 are respectively provided with air separation and blanking mechanisms, a blower is provided in the air separation and blanking mechanisms, and an air separation inlet, an air separation outlet and an air separation outlet are respectively provided on the air separation and blanking mechanisms. The Angelica dahurica raw material coming out of the two discharging conveying mechanisms falls into the air separation inlet, and through the wind force of the blower, the heavier raw material falls out from the air separation outlet, while the lighter impurities and slag are blown out from the air separation outlet, thereby completing further sorting and impurity removal during discharging. The air separation and blanking mechanism can be used together with dust collection and dust removal equipment to reduce the amount of dust in the working environment.

[0058] Example 3

[0059] This example is an implementation scheme based on Example 1. Please refer to Figure 1 , Figure 3In order to solve the problem that the height of Angelica dahurica raw materials is too high during the feeding, transportation and lifting process, which causes the raw materials to tip over on the inclined feeding and lifting mechanism 1 and fall to the outside of the mechanism, affecting the normal progress of the feeding process, the feeding and lifting mechanism 1 of this embodiment includes a feeding belt roller 13, and a feeding belt 14 is arranged on the feeding belt roller 13. A plurality of dividing strips are arranged on the feeding belt 14 to form a plurality of feeding and lifting grids. A flat material mechanism 15 is arranged above one end of the feeding belt 14 close to the bottom end of the feeding and lifting mechanism 1. The flat material mechanism 15 includes a flat material rotating shaft arranged on the feeding and lifting mechanism 1, the flat material rotating shaft is connected to a flat material motor, and a flat material scraper 16 is arranged on the flat material rotating shaft, and the edge of the flat material scraper 16 is arranged in an arc shape. After the Angelica dahurica raw material is put into the feeding belt 14 of the feeding and lifting mechanism 1, the feeding belt 14 is driven by the rotation of the feeding belt roller and cooperates with the feeding and lifting grid arranged thereon to lift the raw material thereon, and a flattening mechanism 15 is arranged near the initial lifting position. The function of the flattening mechanism 15 is to flatten the surface of the Angelica dahurica raw material with a high stacking height through a flattening scraper 16 to prevent it from tipping over, sliding, falling, etc.; the surface of the flattening scraper 16 is arc-shaped. Compared with the straight plate edge, the arc-shaped edge can provide more space for the raw material to be moved when scraping, thereby avoiding the raw material from being unable to move due to accumulation and squeezing during scraping, causing the flattening scraper 16 to excessively squeeze the raw material surface and cause damage, thereby preventing the quality of the medicinal material from being affected.

[0060] Example 4

[0061] This embodiment is an implementation scheme based on Embodiment 1. The existing Angelica dahurica screening and impurity clearing device may clog the sieve holes of the device due to the sieved mud and impurities during use, resulting in the sieve holes being unable to pass impurities when the screening work is halfway through, causing a significant decrease in the screening effect. At this time, frequent shutdowns to clean the sieve holes will greatly affect the equipment processing efficiency and waste a lot of time. When a cleaning and unblocking component is used to synchronously clean and unblock the sieve holes during the operation of the screening device, the unblocking components of the component will pass through the sieve holes to damage the surface of the Angelica dahurica medicinal material inside, break the epidermis and pollute the inside of the medicinal material, affecting the appearance and medicinal properties of the processed product.

[0062] To solve the above problems, Figure 4-Figure 6As shown, a dredging and cleaning mechanism 17 is provided on the inner wall of the equipment casing of this embodiment, and the dredging and cleaning mechanism 17 includes a mechanism hanging bracket 18 connected to the inner wall of the equipment casing, and the mechanism hanging bracket 18 is connected to a mechanism supporting chassis 19, and the mechanism supporting chassis 19 is arranged in the first roller screen 4 and the second roller screen 5. A cleaning slide rail 20 is connected to the mechanism supporting chassis 19, and the cross-section of the cleaning slide rail 20 is square. A walking dredging component 21 is sleeved on the cleaning slide rail 20, and a sieve hole dredging piece 23 is provided on the walking dredging component 21. The sieve hole dredging piece 23 contacts the inner wall of the first roller screen 4 and the second roller screen 5 and acts on the slag sieve hole 6 and the specification classification sieve hole 7 from the inside to the outside. The outer cover of the walking dredging component 21 is provided with a protective barrier cover 22, and the protective barrier cover 22 is connected to the mechanism supporting chassis 19. The dredging and cleaning mechanism 17 dredges the sieve holes from the inside to the outside, which can avoid damaging the surface of the Angelica dahurica medicinal material, thereby protecting the product and ensuring the processing quality. At the same time, compared with the prior art that dredges from the outside to the inside, the equipment squeezes the blockage impurities back into the inside of the sieve drum when dredging from the outside to the inside, and the impurities may continue to clog the sieve holes in the subsequent screening process. Therefore, the cleaning and dredging work does not solve the root problem, and the dredging and cleaning effect is half the result with twice the effort, which further affects the processing efficiency of screening, impurity removal and classification, and reduces the processing effect of the equipment from many aspects. The dredging and cleaning mechanism 17 of this embodiment dredges from the inside to the outside, which can discharge the blockage outside the equipment, thereby avoiding secondary blockage. As the screening work of the equipment and the dredging work of the mechanism run over time, the internal blockage will become less and less, and then the blockage rate of the sieve holes will become smaller and smaller, then the processing effect and processing efficiency of the screening work will be better and more efficient, thereby significantly improving the overall operation effect of the equipment. The protective barrier cover 22 can prevent some medicinal materials from colliding with moving parts and causing damage when the mechanism is running inside the roller screen, and the moving parts of the walking dredging assembly 21 can be moved in coordination with walking wheels, sliders, etc. It should be noted that when the dredging and cleaning mechanism 17 is used to dredge the sieve holes inside, the transportation method of feeding materials by spiral blades inside the first roller screen 4 and the second roller screen 5 is no longer an option, and there will be a conflict between the movements of the two mechanisms. Other transportation methods that will not have an impact can be selected.

[0063] As a preferred embodiment, the existing dredging mechanism only extends into the hole from the outside to squeeze the blockage through components such as a cleaning roller with a cleaning head. It is possible that the blockage will still accumulate in the hole after being crushed and compacted, making the blockage more difficult to clean. In order to solve the above problem, the present embodiment is based on the above-mentioned walking dredging assembly 21, and also includes a walking support sleeve slidably arranged on the cleaning slide rail 20, and the walking support sleeve is connected to the sieve hole dredging member 23, the sieve hole dredging member 23 includes a base 24, a mounting groove is opened in the base 24, and a dredging spring 25 is arranged in the mounting groove, and the end of the dredging spring 25 facing the inner wall of the first roller screen 4 and the second roller screen 5 is connected to a dredging cone 26 for cleaning and dredging the slag sieve hole 6 and the specification classification sieve hole 7 by releasing the potential energy of the spring, and the walking support sleeve is also connected to a pneumatic nozzle 27, and the pneumatic nozzle 27 is connected to an air supply hose that can move with the pneumatic nozzle 27. The dredging cone 26 on the dredging spring 25 contacts alternately with the inner wall of the rotating roller screen and the sieve hole during the movement of the sieve hole dredging member 23. When sliding relatively on the inner wall of the roller screen, the dredging cone 26 stores energy through spring compression. When reaching the sieve hole position, the dredging cone 26 releases energy through the spring to impact and dredge the blockage. At the same time, the air pressure nozzle 27 can also spray out the blockage still remaining in the sieve hole with the aid of jet air pressure. The sieve hole dredging member 23 can be symmetrically provided with two groups of air pressure nozzles 27 on both sides, such as Figure 7 , Figure 8 As shown, the dredging effect can be further guaranteed, and the specific number of settings can also be selected comprehensively according to factors such as equipment size and blockage conditions; the above-mentioned dredging cone 26 uses the release of spring potential energy to impact and dredge the blockage through a dredging action of extension and contraction, and the impact force makes it easier for the blockage to be flushed out of the sieve hole, rather than being squeezed and crushed and then pressed into the blocked hole, so that the dredging and cleaning mechanism 17 of the present invention can avoid secondary blockage of the sieve hole, which significantly improves the dredging effect.

[0064] In order to ensure smooth expansion and contraction when the roller screen frequently contacts the inner wall and the screen holes alternately during operation, Fig. 9 As shown, the dredging cone 26 includes a curved surface guide section 28 connected to the dredging spring 25 and a blockage contact section 29 connected to the end of the curved surface guide section 28. The curved surface guide section 28 and the blockage contact section 29 are tangent to each other at the connection point. The curved surface guide section 28 is used to provide a guiding force for the dredging cone 26 to move and contract in the direction of the spring when the dredging cone 26 contacts the inner wall of the slag screen hole 6 and the specification classification screen hole 7. During the rotation of the rolling screen, when the dredging cone 26 is subjected to the force from the side of the rolling screen in the screen hole, it will generate a component force in the direction of the spring contraction under the guidance of the curved surface guide section 28, thereby retracting. This process is a continuous process under the guidance of the curved surface, which can significantly reduce the impact force on the dredging cone 26 and its mechanism, extend the service life of the mechanism, and improve the fluency of the dredging and cleaning work.

[0065] Example 5

[0066] This embodiment is an automatic classification method for Angelica dahurica, which specifically includes:

[0067] S100, placing the Angelica dahurica raw material on the feeding belt 14 at the bottom of the feeding and lifting mechanism 1, starting the feeding and lifting mechanism 1, and continuously lifting the Angelica dahurica raw material to above the feed hopper 3, so that the Angelica dahurica raw material falls into the first rolling screen 4 through the feed hopper 3, and in the lifting process of the feeding and lifting mechanism 1, the surface of the accumulated raw material is flattened by the flattening mechanism 15;

[0068] S200, start the first roller screen 4, the second roller screen 5 and the dredging and cleaning mechanism 17, the first roller screen 4 rotates to make the Angelica dahurica raw material therein rub and collide, the impurities attached to the Angelica dahurica raw material fall off through the friction and collision, are screened out through the slag sieve holes 6 on the first roller screen 4 and fall into the slag conveying mechanism 11 below, and are transported and collected by the slag conveying mechanism 11; during the screening process, the slag sieve holes 6 and the specification classification sieve holes 7 are blocked and dredged from the inside to the outside through the dredging and cleaning mechanism 17;

[0069] S300, the Angelica dahurica raw material after the impurities are screened out by the first roller screen 4 enters the second roller screen 5, and the raw material with a size smaller than the maximum diameter of the specification classification sieve hole 7 is screened out through the specification classification sieve hole 7 on the second roller screen 5, and falls into the second discharging conveying mechanism 12 below after passing through the air separation and dropping mechanism for conveying and unified collection;

[0070] S400, the Angelica dahurica raw material retained in the second roller screen 5 after screening by the second roller screen 5 is discharged through the outlet end of the second roller screen 5, and after passing through the air separation and dropping mechanism, falls into the first discharging conveying mechanism 8 below for conveying and unified collection, thereby completing the cleaning and classification of the Angelica dahurica raw material.

[0071] The method of this embodiment unclogs and unclogs the residue sieve holes 6 and the specification classification sieve holes 7 from the inside to the outside through the dredging and cleaning mechanism 17, which can avoid damaging the surface of the Angelica dahurica medicinal material, thereby protecting the product and ensuring the processing quality. Compared with the prior art of dredging from the outside to the inside, it can avoid squeezing the clogging impurities back into the sieve cylinder, preventing the impurities from continuing to clog the sieve holes during subsequent screening processes, thereby achieving a more thorough cleaning and dredging effect, and significantly improving the cleaning effect and efficiency.

[0072] Example 6

[0073] Based on the above-mentioned embodiment 5, in order to further ensure the classification effect and the cleaning effect, this embodiment further implements the method of using the unblocking and cleaning mechanism 17 in S200 to block and dredge the slag sieve hole 6 and the specification classification sieve hole 7, including the following steps:

[0074] S201, respectively measure the adjacent spacings of the slag sieve holes 6 and the specification classification sieve holes 7 on the first roller screen 4 and the second roller screen 5, and respectively take a group of axial holes arranged in a direction parallel to the central axis of the roller screen and a group of circumferential holes distributed in a circle along the circumferential direction of the roller screen surface, take the center point of the hole as the measuring point, and measure the spacings between the center points of two adjacent axial holes and the circumferential holes;

[0075] S202, obtaining the spacing measured in S201, and adjusting the spacing between the multiple cleaning parts on the walking dredging assembly 21, so that the spacing between adjacent cleaning parts on the two groups of walking dredging assemblies 21 and the spacing between adjacent holes on the first roller screen 4 and the second roller screen 5 are respectively equal in the axial direction and the circumferential direction;

[0076] S203, through the connection support of the mechanism hoisting bracket 18 of the dredging and cleaning mechanism 17, the cleaning slide rail 20 is set at the top of the first roller screen 4 and the second roller screen 5, and two sets of walking dredging components 21 are respectively installed on the cleaning slide rail 20 in the first roller screen 4 and the second roller screen 5, so that the cleaning parts used for dredging and cleaning on the walking dredging components 21 are in contact with the inner walls of the first roller screen 4 and the second roller screen 5, and the walking dredging components 21 are allowed to slide along the cleaning slide rail 20 in a contact state;

[0077] S204, obtaining the spacing measured in S201 to adjust the walking time, walking speed, and walking interval dwell time of the two groups of walking dredging components 21 respectively, so that the walking dredging components 21 stay at a new position after walking a certain distance and the cleaning parts correspond to the sieve holes at the new positions one by one, and the dwelling time at the new position needs to be such that the cleaning parts are in contact with all the circumferential sieve holes at the corresponding positions for at least one round;

[0078] S205, setting the initial position of the walking and unblocking component 21 at the corresponding position of one end of the sieve hole distribution surface of the first roller screen 4 and the second roller screen 5, and setting the cleaning part and the position of the sieve hole in a one-to-one correspondence. After the first roller screen 4 and the second roller screen 5 start to rotate, start the two groups of walking and unblocking components 21 to dredge the blocked holes of the rotating first roller screen 4 and the second roller screen 5 from the inside to the outside. After the walking and unblocking component 21 stays at the initial position for the time preset in S204, it starts to walk and stay along the cleaning slide rail 20 for the preset time. The cleaning part alternately contacts the inner wall and the sieve hole of the rotating roller screen. When sliding relatively on the inner wall of the roller screen, the cleaning part stores energy through spring compression. When reaching the sieve hole position, the cleaning part releases energy through the spring to collide and dredge the blockage until it reaches the corresponding position at the other end of the sieve hole distribution surface of the roller screen. The walking and unblocking component 21 then moves back and forth in the opposite direction to clean and dredge.

[0079] This embodiment measures the distance between the sieve holes and sets the parameters such as the walking time, walking speed, and walking interval dwell time of the walking dredging component 21, so that the walking dredging component 21 is positioned and dwelled at intervals at the corresponding position of each sieve hole on the rolling screen, so that all the sieve holes around the rolling screen at this position can be dredged and cleaned. Therefore, through the control of positioning and dwelling time, the pertinence and accuracy of dredging are significantly improved, so that each dredging of the dredging and cleaning mechanism 17 can be accurately aligned with the sieve holes, avoiding the dredging and cleaning mechanism 17 only contacting the inner wall of the rolling screen most of the time during movement without fully dredging the sieve holes, thereby ensuring the comprehensive coverage of the dredging treatment work.

[0080] Example 7

[0081] This embodiment is based on embodiment 5. Since the raw material is in the screening process, in order to facilitate the judgment of the progress of the impurity cleaning process, the impurity cleaning completion rate information of the raw material is obtained, so as to facilitate the judgment of the timing of starting the next level of screening, this embodiment adopts a method of measuring the impurities screened out in S200 to judge the impurity cleaning completion degree. After the impurity cleaning completion degree reaches the requirement, the Angelica dahurica raw material is input into the second rolling screen. Specifically, the method for judging the impurity cleaning completion degree is:

[0082] A gravity sensor is installed on the slag conveying mechanism to obtain the gravity information of the slag impurities screened out during the screening process. Let G(t) be the gravity value that changes with time t, which represents the gravity accumulated by the impurities on the conveying mechanism over time. In the screening time period T, the total gravity of the impurities accumulated is G i (t end )for:

[0083]

[0084] Among them, t end is the end time point of the integration within the screening time period T, and t is the integration variable;

[0085] Cleaning completion rate R(t end )for:

[0086]

[0087] Among them, G total is the total weight of the Angelica dahurica raw material before screening;

[0088] For R(t end ) is derived to obtain the first-order derivative R'(t end ) and the second-order derivative R”(t end ), then R(t end ) is the function curvature K(t end )for:

[0089]

[0090] K(t end ) is dK(t end ) / dt end , K(t end ) reflects the cumulative change trend of the gravity of impurities collected during the cleaning process. end ) is close to 0, and it is considered that the cleaning completion rate R(t end ) tends to be stable around this time point, assuming K(t end )’s rate of change takes the point threshold as ∈, and takes dK(t end ) / dt end ≤∈, calculate the cleaning completion rate R(t') at that time point and compare it with the preset standard cleaning completion rate R standard For comparison, when R(t')≥R standard , it is judged that the cleaning is completed. The specific information acquisition, collection and processing can be selected and implemented based on the gravity sensor and computer processor combined with the existing technology. The gravity sensor model can be selected as follows: SZOBTE LSZ-S06, JCXD AR-DN23.

[0091] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A method for automatically removing impurities and classifying angelica dahurica, characterized in that: The steps include: S100, placing the Angelica dahurica raw material on the feeding belt (14) at the bottom of the feeding and lifting mechanism (1), starting the feeding and lifting mechanism (1), so that the Angelica dahurica raw material is lifted and then falls into the first rolling screen (4) through the feeding hopper (3), and during the feeding and lifting process, the surface of the accumulated raw material is flattened by the flattening mechanism (15); S200, starting the first roller screen (4), the second roller screen (5) and the dredging and cleaning mechanism (17) to remove impurities on the Angelica dahurica raw material, the impurities are screened out through the slag sieve holes (6) on the first roller screen (4) and fall into the slag conveying mechanism (11) below, and are transported and collected by the slag conveying mechanism (11); during the screening process, the slag sieve holes (6) and the specification classification sieve holes (7) are blocked and dredged from the inside to the outside through the dredging and cleaning mechanism (17); S300, the Angelica dahurica raw material enters the second rolling screen (5), passes through the specification classification sieve holes (7) on the second rolling screen (5), and the raw material with a size smaller than the maximum diameter of the specification classification sieve holes (7) is screened out and falls into the second discharging conveying mechanism (12) below for conveying and collection; S400, the Angelica dahurica raw material retained in the second roller screen (5) after being screened by the second roller screen (5) is discharged through the outlet end of the second roller screen (5), and after passing through the air separation and dropping mechanism, falls into the first discharging conveying mechanism (8) below for conveying and collection, thereby completing the cleaning and classification of the Angelica dahurica raw material.

2. A method for automatically removing impurities and classifying angelica dahurica according to claim 1, characterized in that: The method of using the unblocking and cleaning mechanism (17) to unblock the slag sieve holes (6) and the specification classification sieve holes (7) in S200 comprises the following steps: S201, respectively measuring the adjacent spacings between the slag sieve holes (6) and the specification classification sieve holes (7) on the first roller screen (4) and the second roller screen (5), taking a group of axial holes arranged in a direction parallel to the central axis of the roller screen and a group of circumferential holes distributed in a circle along the circumferential direction of the surface of the roller screen, taking the center point of the hole as the measuring point, and measuring the spacings between the center points of two adjacent axial holes and the circumferential holes; S202, obtaining the spacing measured in S201, and adjusting the spacing between the plurality of cleaning components on the walking dredging assembly (21) so that the spacing between adjacent cleaning components on the two groups of walking dredging assemblies (21) and the spacing between adjacent holes on the first roller screen (4) and the second roller screen (5) are respectively equal in the axial direction and the circumferential direction; S203, by means of the connection support of the mechanism hoisting bracket (18) of the dredging and cleaning mechanism (17), the cleaning slide rail (20) is arranged at the top of the first roller screen (4) and the second roller screen (5), and two groups of walking dredging components (21) are respectively installed on the cleaning slide rail (20) in the first roller screen (4) and the second roller screen (5), so that the cleaning parts used for dredging and cleaning on the walking dredging components (21) are in contact with the inner walls of the first roller screen (4) and the second roller screen (5), and the walking dredging components (21) are allowed to slide along the cleaning slide rail (20) in a contact state; S204, obtaining the spacing measured in S201 to adjust the walking time, walking speed, and walking interval dwell time of the two groups of walking dredging components (21) respectively, so that the walking dredging components (21) stay at a new position after walking a certain distance, and the cleaning parts correspond to the sieve holes at the new positions one by one, and the dwell time at the new position needs to be sufficient to allow the cleaning parts to contact all the circumferential sieve holes at the corresponding positions for at least one round; S205, the initial positions of the walking and unblocking components (21) are respectively set at the corresponding positions at one end of the sieve hole distribution surface of the first roller screen (4) and the second roller screen (5), and the cleaning parts are set in a one-to-one correspondence with the positions of the sieve holes. After the first roller screen (4) and the second roller screen (5) start to rotate, the two groups of walking and unblocking components (21) are started to unblock the blocked holes of the rotating first roller screen (4) and the second roller screen (5) from the inside to the outside. After the walking and unblocking components (21) stay at the initial position for a preset time in S204, they start to move and stay along the cleaning slide rail (20) for a preset time. The cleaning parts are alternately in contact with the inner wall and the sieve holes of the rotating roller screen. When the cleaning parts slide relatively on the inner wall of the roller screen, they store energy through spring compression. When they reach the sieve hole position, the cleaning parts release energy through the spring to collide and unblock the blockage until they reach the corresponding position at the other end of the sieve hole distribution surface of the roller screen. The walking and unblocking components (21) then move back and forth in the opposite direction to clean and unblock.

3. A method for automatically removing impurities and classifying angelica dahurica according to claim 1, characterized in that: In S200, a method of measuring the impurities screened out is adopted to determine the degree of impurity removal. After the degree of impurity removal reaches the requirement, the Angelica dahurica raw material is input into the second rolling screen. Specifically, the method of determining the degree of impurity removal is as follows: A gravity sensor is installed on the slag conveying mechanism to obtain the gravity information of the slag impurities screened out during the screening process. Let G(t) be the gravity value that changes with time t, which represents the gravity accumulated by the impurities on the conveying mechanism over time. In the screening time period T, the total gravity of the impurities accumulated is G i (t end )for: Among them, t end is the end time point of the integration within the screening time period T, and t is the integration variable; Cleaning completion rate R(t end )for: Among them, G total is the total weight of the Angelica dahurica raw material before screening; For R(t end ) is derived to obtain the first-order derivative R'(t end ) and the second-order derivative R”(t end ), then R(t end ) is the function curvature K(t end )for: K(t end ) is dK(t end ) / dt end , K(t end ) reflects the cumulative change trend of the gravity of impurities collected during the cleaning process. end ) is close to 0, and it is considered that the cleaning completion rate R(t end ) tends to be stable around this time point, assuming K(t end )’s rate of change takes the point threshold as ∈, and takes dK(t end ) / dt end ≤∈, calculate the cleaning completion rate R(t') at that time point and compare it with the preset standard cleaning completion rate R standard For comparison, when R(t')≥R standard , it is judged that the cleaning is completed.

4. An automatic cleaning and sorting device for Angelica dahurica, characterized in that: The invention comprises a feeding and lifting mechanism (1), wherein a roller screen cleaning and sorting device (2) is arranged at the outlet end of the feeding and lifting mechanism (1), a feed hopper (3) cooperating with the feeding and lifting mechanism (1) is arranged inside the roller screen cleaning and sorting device (2), a first roller screen (4) is arranged at the outlet end of the feed hopper (3), a second roller screen (5) is connected to the end of the first roller screen (4), the first roller screen (4) and the second roller screen (5) are both arranged inside the roller screen cleaning and sorting device (2), a slag sieve hole (6) is arranged on the first roller screen (4), a specification classification sieve hole (7) is arranged on the second roller screen (5), the maximum aperture of the slag sieve hole (6) is smaller than the maximum aperture of the size specification sieve hole, and a first discharge conveying mechanism (8) is arranged below the outlet end of the second roller screen (5).

5. The automatic angelica root cleaning and sorting device according to claim 4 is characterized in that: The bottoms of the first roller screen (4) and the second roller screen (5) are respectively connected to a first lower hopper (9) and a second lower hopper (10); a slag conveying mechanism (11) for conveying slag to the outside of the device is arranged below the first lower hopper (9); a second discharge conveying mechanism (12) for conveying material screened and discharged by the second roller screen (5) to the outside of the device is arranged below the second lower hopper (10).

6. The automatic angelica root cleaning and sorting device according to claim 5, characterized in that: The outlet ends of the first discharging conveying mechanism (8) and the second discharging conveying mechanism (12) are respectively provided with a pneumatic blanking mechanism, a blower is provided inside the pneumatic blanking mechanism, and the pneumatic blanking mechanism is respectively provided with a pneumatic inlet, a pneumatic outlet and a pneumatic slag outlet.

7. The automatic angelica root cleaning and sorting device according to claim 4 is characterized in that: The feeding and lifting mechanism (1) comprises a feeding belt roller (13), a feeding belt (14) is arranged on the feeding belt roller (13), a plurality of feeding and lifting grids are formed by arranging a plurality of dividing strips on the feeding belt (14), a flat material mechanism (15) is arranged above one end of the feeding belt (14) close to the bottom end of the feeding and lifting mechanism (1), the flat material mechanism (15) comprises a flat material rotating shaft arranged on the feeding and lifting mechanism (1), the flat material rotating shaft is connected to a flat material motor, a flat material scraper (16) is arranged on the flat material rotating shaft, and the edge of the flat material scraper (16) is arranged in an arc shape.

8. The automatic angelica root cleaning and sorting device according to claim 4, characterized in that: A dredging and cleaning mechanism (17) is arranged on the inner wall of the device housing, and the dredging and cleaning mechanism (17) comprises a mechanism hanging bracket (18) connected to the inner wall of the device housing, and the mechanism hanging bracket (18) is connected to a mechanism supporting base frame (19), and the mechanism supporting base frame (19) is arranged in the first rolling screen (4) and the second rolling screen (5), and a cleaning slide rail (20) is connected to the mechanism supporting base frame (19), and the cross section of the cleaning slide rail (20) is square. A walking dredging assembly (21) is sleeved on the cleaning slide rail (20), and a sieve hole dredging member (23) is arranged on the walking dredging assembly (21). The sieve hole dredging member (23) contacts the inner wall of the first roller screen (4) and the second roller screen (5) and acts on the slag sieve hole (6) and the specification classification sieve hole (7) from the inside to the outside. The outer cover of the walking dredging assembly (21) is provided with a protective barrier cover (22), and the protective barrier cover (22) is connected to the mechanism support frame (19).

9. The device for automatically cleaning and sorting angelica root according to claim 8, characterized in that: The walking dredging assembly (21) comprises a walking support sleeve slidably arranged on the cleaning slide rail (20), the walking support sleeve being connected to a screen hole dredging member (23), the screen hole dredging member (23) comprising a base (24), the base (24) being provided with an installation groove, the installation groove being provided with a dredging spring (25), the end of the dredging spring (25) facing the inner wall of the first roller screen (4) and the second roller screen (5) being connected to a dredging cone (26) for clearing and unblocking the slag screen holes (6) and the specification classification screen holes (7) by releasing the potential energy of the spring, the walking support sleeve being further connected to a pneumatic nozzle (27), the pneumatic nozzle (27) being connected to an air supply hose that can move with the pneumatic nozzle (27).

10. The automatic angelica root cleaning and sorting device according to claim 9, characterized in that: The dredging cone (26) comprises a curved guide section (28) connected to the dredging spring (25) and a blockage contact section (29) connected to the end of the curved guide section (28). The surfaces of the curved guide section (28) and the blockage contact section (29) are tangent at the connection point. The curved guide section (28) is used to provide a guiding force for the dredging cone (26) to move and contract in the direction of the spring when the dredging cone (26) contacts the inner wall of the slag sieve hole (6) and the specification classification sieve hole (7).

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