Traditional Chinese medicine extraction preparation filtering device

Abstract

The utility model provides a kind of traditional Chinese medicine extraction preparation filtering device, it is related to traditional Chinese medicine preparation technical field.The filtering device includes: vertical filter tank body, its top and bottom are separately provided with liquid inlet pipe and liquid outlet pipe;First filter screen, it is set in vertical filter tank body inner chamber, and the inner chamber of vertical filter tank body is divided into raw liquid storage cavity and clear liquid storage cavity by vertically;Deslagging assembly, including gravity type deslagging pipe and low-frequency ultrasonic wave generating structure, one end of gravity type deslagging pipe is communicated with raw liquid storage cavity, and the other end extends to the outside of vertical filter tank body, and low-frequency ultrasonic wave generating structure is set on the lateral wall of vertical filter tank body;And magnetic field generating structure, including magnetic nano-particle adding pipe and multiple different diameter annular electromagnet, magnetic nano-particle adding pipe is communicated with raw liquid storage cavity, and multiple annular electromagnets are concentrically set in the bottom of first filter screen.The present application effectively alleviates the problem that viscous substance fills pore in conventional device, and resistance increases suddenly.

Description

Technical Field

[0001] This utility model relates to the field of traditional Chinese medicine preparation technology, and more specifically, to a traditional Chinese medicine extraction and preparation filtration device. Background Technology

[0002] The preparation of traditional Chinese medicine liquid usually involves selecting, cleaning, and processing the medicinal materials, soaking them in an appropriate amount of water, and then extracting the effective components through decoction. After decoction, the resulting mixture needs to be filtered to remove the dregs and impurities, forming a preliminary liquid. The filtration process directly affects the clarity and purity of the liquid. The Chinese medicine filtration device is mainly composed of a filter tank. The tank is equipped with a filter screen according to the filtration accuracy requirements. The filter screen is mostly made of stainless steel or nylon. The top of the tank is equipped with a liquid inlet and the bottom is equipped with a liquid outlet for the filtered medicine liquid to be discharged.

[0003] However, for viscous liquids, the polysaccharides, colloids and other components they contain tend to adhere to the surface of the filter screen during filtration. As filtration proceeds, the viscous substances gradually fill the pores of the filter screen, forming a dense filter cake. This not only hinders the flow of the liquid but also adsorbs more impurities due to its viscosity, leading to a sharp increase in filtration resistance and a significant decrease in efficiency. In particular, when the temperature drops, the viscosity of the viscous substances increases, and the clogging becomes more severe. Utility Model Content

[0004] The purpose of this invention is to provide a filtration device for the extraction and preparation of traditional Chinese medicine, which aims to solve the technical problems mentioned in the background art.

[0005] The embodiments of this utility model are implemented as follows: This application provides a traditional Chinese medicine extraction and preparation filtration device, comprising: a vertical filter tank body, with an inlet pipe and an outlet pipe respectively provided at the top and bottom; a first filter screen disposed in the inner cavity of the vertical filter tank body, dividing the inner cavity of the vertical filter tank body into a raw liquid storage cavity and a clear liquid storage cavity; and a slag discharge assembly, including a gravity slag discharge pipe and a low-frequency ultrasonic wave generating structure, one end of the gravity slag discharge pipe being connected to the raw liquid storage cavity and located above the center of the first filter screen, and the other end extending to the outside of the vertical filter tank body, and the low-frequency ultrasonic wave generating structure being disposed on the upper... On the outer wall of the vertical filter tank, low-frequency ultrasonic waves are generated towards the first filter screen; and a magnetic field generating structure includes a magnetic nanoparticle adding tube and multiple annular electromagnets of different diameters. The magnetic nanoparticle adding tube is connected to the original liquid storage cavity. The multiple annular electromagnets are concentrically arranged at the bottom of the first filter screen, and the center of any one of the annular electromagnets is located at the center of the first filter screen. The magnetic field strength of the multiple annular electromagnets gradually decreases outward along the radial direction of the first filter screen; wherein, the inner ring side of any one of the annular electromagnets is of the S class and the outer ring side is of the N class.

[0006] Furthermore, based on the aforementioned scheme, a second filter screen is provided inside the above-mentioned raw liquid storage cavity, and the above-mentioned raw liquid storage cavity is divided into a first cavity and a second cavity. The filter pore diameter of the first filter screen is smaller than the filter pore diameter of the second filter screen.

[0007] Furthermore, based on the aforementioned scheme, a stirring paddle is rotatably disposed within the first cavity, and the stirring paddle is equipped with a drive motor that drives its rotation.

[0008] Furthermore, based on the aforementioned scheme, the top of the vertical filter tank is provided with an opening, and a sealing head is detachably provided on the opening; The second filter screen is detachably fitted to the vertical filter tank body. The agitator and the drive motor are both mounted on the sealing head. The second filter screen is mounted on the bottom side of the agitator and rotates with the agitator.

[0009] Furthermore, based on the aforementioned scheme, an annular rubber ring is provided on the outer ring side of the second filter screen for sealing and fitting with the inner wall of the vertical filter tank.

[0010] Furthermore, based on the aforementioned scheme, the vertical filter tank body is provided with an annular water bath chamber in the inner circumferential direction, and the annular water bath chamber is located on the outer periphery of the original liquid storage chamber. The aforementioned annular water bath chamber is connected to an inlet pipe and a drain pipe equipped with valves.

[0011] Furthermore, based on the aforementioned scheme, the first filter screen is a concave conical structure.

[0012] Furthermore, based on the aforementioned scheme, the first filter screen is provided with a slag discharge port at its center, the bottom of the slag discharge port is connected to a slag discharge box, and the gravity-type slag discharge pipe is connected to the slag discharge box.

[0013] Furthermore, based on the aforementioned scheme, the gravity-type slag discharge pipe is equipped with a first electric valve, and the liquid discharge pipe is equipped with a second valve.

[0014] Furthermore, based on the aforementioned scheme, the annular electromagnet with the smallest diameter is installed inside the aforementioned slag discharge port.

[0015] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects: In this application, the magnetic nanoparticles added to the original liquid storage cavity are surface-modified with affinity groups for viscous impurities such as polysaccharides and colloids, which can specifically adsorb these impurities to form magnetic complexes, reducing the probability of them freely suspending and adhering to the filter screen. The concentric ring electromagnets at the bottom of the first filter screen are arranged with "inner ring S pole and outer ring N pole", and the magnetic field strength increases from the outside to the inside, which can generate a continuous radial inward traction force on the magnetic complexes, guiding them to gather towards the center of the first filter screen. The gravity-type slag discharge pipe is located above the center of the filter screen, which can discharge the gathered magnetic complexes in time, preventing them from spreading and accumulating on the filter screen surface. At the same time, the low-frequency ultrasonic generator emits vibration energy to the first filter screen, which can cause the viscous impurities (including the parts not adsorbed by magnetic particles) that have adhered to the filter screen surface to detach from the filter screen. The detached impurities are also guided to the central slag discharge pipe for discharge under the dual action of gravity and magnetic field, forming a closed-loop treatment of "adsorption-traction-removal-discharge". The advantages of this design are as follows: by using the specific adsorption of magnetic nanoparticles, the non-specific binding of viscous impurities to the filter screen is reduced from the source; by using the directional traction of a gradient magnetic field, impurities are actively gathered towards the discharge port, preventing them from dispersing and adhering on the filter screen surface; and with the real-time cleaning effect of ultrasound, filter cake formation is further prevented. The three work together to continuously keep the filter screen pores open, effectively alleviating the problem of viscous substances filling the pores and the sudden increase in resistance in traditional devices. Even when the temperature decreases and the viscosity of the liquid increases, the synergy of magnetic field traction and ultrasonic vibration can still maintain a stable filtration efficiency and improve the adaptability of the device to viscous liquids. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an isometric view of a traditional Chinese medicine extraction and preparation filtration device according to an embodiment of the present invention; Figure 2 This is an exploded view of a traditional Chinese medicine extraction and preparation filtration device according to an embodiment of this utility model; Figure 3 This is a top view of a traditional Chinese medicine extraction and preparation filtration device according to an embodiment of the present invention; Figure 4 for Figure 3 A cross-sectional view along the AA direction; Figure 5 for Figure 4 A magnified view of part B in the image; Figure 6 for Figure 4 A magnified view of part C; Figure 7 This is an isometric view of the vertical filter tank body according to an embodiment of the present invention; Figure 8 This is an isometric view of the first filter screen in an embodiment of this utility model.

[0018] Icons: 1-Low-frequency ultrasonic generator structure, 2-Vertical filter tank body, 3-Sealing head, 4-Inlet pipe, 5-Drive motor, 6-Magnetic nanoparticle addition pipe, 7-Drain pipe, 8-Water inlet pipe, 9-Gravity slag discharge pipe, 10-First electric valve, 11-Drain pipe, 12-Second valve, 13-First filter screen, 14-Second filter screen, 15-Agitator, 16-Annular water bath chamber, 17-Clear liquid storage chamber, 18-Original liquid storage chamber, 1801-First chamber, 1802-Second chamber, 19-Slag discharge box, 20-Slag discharge port, 21-Annular rubber ring, 22-Annular electromagnet. Detailed Implementation

[0019] The embodiments of this application will now be described in detail with reference to the accompanying drawings. Example

[0020] Please refer to Figures 1-8 This application provides a traditional Chinese medicine extraction and preparation filtration device, comprising: a vertical filter tank body 2, with an inlet pipe 4 and an outlet pipe 11 respectively provided at the top and bottom; a first filter screen 13, which is disposed in the inner cavity of the vertical filter tank body 2, dividing the inner cavity of the vertical filter tank body 2 into a raw liquid storage cavity 18 and a clear liquid storage cavity 17; and a slag discharge assembly, including a gravity slag discharge pipe 9 and a low-frequency ultrasonic wave generating structure 1, one end of the gravity slag discharge pipe 9 being connected to the raw liquid storage cavity 18 and located above the center of the first filter screen 13, and the other end extending to the outside of the vertical filter tank body 2, and the low-frequency ultrasonic wave generating structure 1 being disposed in the... On the outer wall of the vertical filter tank 2, low-frequency ultrasonic waves are generated to the first filter screen 13; and a magnetic field generating structure is provided, including a magnetic nanoparticle adding tube 6 and multiple annular electromagnets 22 of different diameters. The magnetic nanoparticle adding tube 6 is connected to the original liquid storage cavity 18. The multiple annular electromagnets 22 are concentrically arranged at the bottom of the first filter screen 13, and the center of any one of the annular electromagnets 22 is located at the center of the first filter screen 13. The magnetic field strength of the multiple annular electromagnets 22 gradually decreases outward along the radial direction of the first filter screen 13; wherein, the inner ring side of any one of the annular electromagnets 22 is of the S class and the outer ring side is of the N class.

[0021] In this application, the magnetic nanoparticles added to the original liquid storage chamber 18 are surface-modified with affinity groups for viscous impurities such as polysaccharides and colloids, which can specifically adsorb these impurities to form magnetic complexes, reducing the probability of them freely suspending and adhering to the filter screen. The concentric ring electromagnets 22 at the bottom of the first filter screen 13 are arranged with "inner ring S pole and outer ring N pole", and the magnetic field strength increases from the outside to the inside, which can generate a continuous radial inward traction force on the magnetic complexes, guiding them to gather towards the center of the first filter screen 13. The gravity discharge pipe 9 is located above the center of the filter screen, which can discharge the gathered magnetic complexes in time, preventing them from spreading and accumulating on the filter screen surface. At the same time, the low-frequency ultrasonic generator 1 emits vibration energy to the first filter screen 13, which can cause the viscous impurities (including the part not adsorbed by the magnetic particles) that have adhered to the filter screen surface to detach from the filter screen. The detached impurities are also guided to the central discharge pipe for discharge under the dual action of gravity and magnetic field, forming a closed-loop treatment of "adsorption-traction-removal-discharge". The advantages of this design are as follows: by using the specific adsorption of magnetic nanoparticles, the non-specific binding of viscous impurities to the filter screen is reduced from the source; by using the directional traction of the gradient magnetic field, impurities are actively gathered towards the slag discharge port 20, preventing them from being dispersed and attached to the filter screen surface; and with the real-time cleaning effect of ultrasound, filter cake formation is further prevented. The three work together to continuously keep the filter screen pores open, effectively alleviating the problem of viscous substances filling the pores and the sudden increase in resistance in traditional devices. Even when the temperature decreases and the viscosity of the liquid increases, the device can still maintain a stable filtration efficiency through the synergy of magnetic field traction and ultrasonic vibration, improving the device's adaptability to viscous liquids.

[0022] In this scheme, magnetic nanoparticles can typically be iron(III) oxide (Fe3O4) nanoparticles, because they have good biocompatibility, strong magnetic and chemical stability, and their surface can be easily modified with affinity groups (such as amino and hydroxyl groups) for sticky impurities such as polysaccharides and colloids, making them suitable for the specific adsorption of target impurities in drug solutions.

[0023] Optionally, there are two low-frequency ultrasonic generating structures 1, symmetrically arranged about the middle of the vertical filter tank 2. The low-frequency ultrasonic generating structure 1 mainly consists of an ultrasonic generator, an ultrasonic transducer, and a fixed coupling assembly. The ultrasonic generator is used to convert mains power into an electrical signal of a specific frequency (low frequency band); the ultrasonic transducer (mostly made of piezoelectric ceramic material) is installed on the outer wall of the vertical filter tank, corresponding to the position of the first filter screen 13, and can convert the electrical signal into mechanical vibration to generate low-frequency ultrasonic waves; the fixed coupling assembly (such as high-temperature resistant coupling agent, metal fixing seat) ensures that the transducer is in close contact with the tank wall, reduces vibration energy loss, and enables the ultrasonic waves to be efficiently transmitted to the first filter screen 13, realizing the vibration removal of impurities on the filter screen surface.

[0024] In a preferred embodiment, a second filter screen 14 is provided in the above-mentioned original liquid storage cavity 18, and the above-mentioned original liquid storage cavity 18 is divided into a first cavity 1801 and a second cavity 1802. The filter hole diameter of the first filter screen 13 is smaller than the filter hole diameter of the second filter screen 14.

[0025] In the above embodiment, a second filter screen 14 with a pore diameter larger than that of the first filter screen 13 is provided in the original liquid storage chamber 18, dividing the original liquid storage chamber 18 into an upper and lower first chamber 1801 and a second chamber 1802. This allows for a graded primary filtration process of "coarse first, fine later": the liquid first enters the first chamber 1801, where the second filter screen 14 intercepts larger particulate impurities (such as drug residue, coarse fibers, etc.), and after preliminary purification, it enters the second chamber 1802, where the first filter screen 13 filters out fine impurities. This design can block large impurities first, preventing them from directly entering the second chamber 1802 and clogging the fine pores of the first filter screen 13, reducing the filtration load on the first filter screen 13, lowering the probability of clogging, thereby improving the overall primary filtration efficiency and extending the service life of the first filter screen 13.

[0026] In a preferred embodiment, a stirring paddle 15 is rotatably disposed inside the first cavity 1801, and the stirring paddle 15 is provided with a drive motor 5 that drives it to rotate.

[0027] In the above embodiment, a rotatable stirring paddle 15 driven by a drive motor 5 is provided in the first chamber 1801. The paddle can continuously stir the raw liquid entering the first chamber 1801 to fully mix with the magnetic nanoparticles, thereby improving the adsorption efficiency of the magnetic particles on viscous impurities such as polysaccharides and colloids. At the same time, it can prevent large particles of impurities from accumulating locally on the upper surface of the second filter screen 14 to form a filter cake, reducing the risk of clogging in the coarse filtration stage, ensuring smooth flow of the medicine from the first chamber 1801 to the second chamber 1802, and providing a more uniform pre-treated medicine for subsequent fine filtration, thereby improving the overall operational stability and efficiency of the filtration device.

[0028] In a preferred embodiment, the top of the vertical filter tank 2 is provided with an opening, and a sealing head 3 is detachably provided on the opening. The second filter screen 14 is detachably coupled to the vertical filter tank body 2. The stirring paddle 15 and the drive motor 5 are both mounted on the sealing head 3. The second filter screen 14 is mounted on the bottom side of the stirring paddle 15 and rotates with the stirring paddle 15.

[0029] In the above embodiment, the top of the vertical filter tank 2 is provided with a detachable sealing head 3, and the second filter screen 14 is separable from the vertical filter tank 2. The stirring paddle 15 and the drive motor 5 are integrated into the sealing head 3, and the second filter screen 14 and the stirring paddle 15 are rotatably engaged. The advantage of this design is that the stirring paddle 15, the drive motor 5 and the second filter screen 14 can be taken out simultaneously by opening the sealing head 3, which greatly simplifies the disassembly process of the components, facilitates the cleaning and replacement of the second filter screen 14 (especially suitable for the cleaning needs of the filter screen after filtering viscous liquid), and also facilitates the inspection and maintenance of the stirring paddle 15 and the drive motor 5.

[0030] As a preferred embodiment, the outer ring side of the second filter screen 14 is provided with an annular rubber ring 21 for sealing and fitting with the inner wall of the vertical filter tank 2.

[0031] In the above embodiment, the annular rubber ring 21 on the outer ring side of the second filter screen is sealed to the inner wall of the tank, which can prevent the original liquid in the first cavity 1801 from flowing directly into the second cavity 1802 without being filtered by the second filter screen 14, thus ensuring the graded filtration effect and avoiding leakage of the medicine.

[0032] In a preferred embodiment, the vertical filter tank 2 is provided with an annular water bath chamber 16 in the inner circumference, and the annular water bath chamber 16 is located on the outer periphery of the original liquid storage chamber 18. The aforementioned annular water bath chamber 16 is connected to an inlet pipe 8 with a valve and an outlet pipe 7.

[0033] In the above embodiment, the annular water bath chamber 16 in the inner circumference of the vertical filter tank 2 can be filled with hot water through the inlet pipe 8 and the drain pipe 7 (with valve) to prevent the viscosity of the viscous components such as polysaccharides and colloids from increasing due to low temperature, which would aggravate the clogging of the filter screen, while maintaining the fluidity of the medicine to cooperate with the filtration operation.

[0034] As a preferred embodiment, the first filter screen 13 is a concave conical structure.

[0035] In the above embodiment, the first filter screen 13 has a concave conical structure, which facilitates the accumulation of impurities towards the center under the action of gravity, making it easier to discharge them through the central slag discharge pipe and reducing the accumulation and clogging on the surface of the filter screen.

[0036] In a preferred embodiment, the first filter screen 13 is provided with a slag discharge port 20 at its center, the bottom of the slag discharge port 20 is connected to a slag discharge box 19, and the gravity slag discharge pipe 9 is connected to the slag discharge box 19.

[0037] In the above embodiment, the slag discharge port 20 at the center of the first filter screen 13 guides impurities into the slag discharge box 19, and then discharges them through the gravity slag discharge pipe 9, so that the collected impurities can be discharged through the gravity slag discharge pipe 9 after reaching a certain amount.

[0038] In a preferred embodiment, the gravity-type slag discharge pipe 9 is equipped with a first electric valve 10, and the liquid discharge pipe 11 is equipped with a second valve 12.

[0039] In the above embodiments, the first electric valve 10 of the gravity-type slag discharge pipe 9 facilitates automatic control of slag discharge, and the second valve 12 of the liquid discharge pipe 11 can regulate the discharge of the liquid. The two work together to achieve independent operation of slag discharge and liquid discharge, avoiding mutual interference.

[0040] In a preferred embodiment, the annular electromagnet 22 with the smallest diameter is disposed inside the slag discharge port 20.

[0041] In the above embodiment, the annular electromagnet 22 with the smallest diameter is set inside the slag discharge port 20, which can enhance the magnetic field strength at the slag discharge port 20, strengthen the attraction of magnetic impurities, promote their entry into the slag discharge port 20, and improve the slag discharge efficiency.

[0042] Furthermore, unless otherwise explicitly specified or limited, the terms "installation" and "connection" in this application embodiment should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "lower," "left," "right," "inner," "outer," and "side," etc., are merely for reference to the direction in the accompanying drawings or the usual placement of the product during use. They are only for clearly describing this application and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application. The terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance; "multiple" refers to at least two. In this application embodiment, the limitations on relative positional relationships such as parallel, perpendicular, and aligned are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallel, perpendicular, and aligned are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.

[0043] The above are only some embodiments and implementation methods of this application. The protection scope of this application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A filtration device for the extraction and preparation of traditional Chinese medicine, characterized in that, include: The vertical filter tank body (2) is provided with an inlet pipe (4) and a drain pipe (11) at the top and bottom respectively; The first filter screen (13) is installed in the inner cavity of the vertical filter tank body (2) and divides the inner cavity of the vertical filter tank body (2) into a raw liquid storage chamber (18) and a clear liquid storage chamber (17). The slag discharge assembly includes a gravity slag discharge pipe (9) and a low-frequency ultrasonic wave generating structure (1). One end of the gravity slag discharge pipe (9) is connected to the raw liquid storage chamber (18) and is located above the center of the first filter screen (13). The other end extends to the outside of the vertical filter tank body (2). The low-frequency ultrasonic wave generating structure (1) is disposed on the outer wall of the vertical filter tank body (2) and is used to generate low-frequency ultrasonic waves to the first filter screen (13). as well as The magnetic field generating structure includes a magnetic nanoparticle adding tube (6) and multiple annular electromagnets (22) of different diameters. The magnetic nanoparticle adding tube (6) is connected to the original liquid storage cavity (18). The multiple annular electromagnets (22) are concentrically arranged at the bottom of the first filter screen (13), and the center of any one of the annular electromagnets (22) is located at the center of the first filter screen (13). The magnetic field strength of the multiple annular electromagnets (22) gradually decreases as they extend outward along the radial direction of the first filter screen (13). In any of the ring electromagnets (22), the inner ring side is of class S and the outer ring side is of class N.

2. The traditional Chinese medicine extraction and preparation filtration device according to claim 1, characterized in that, The original liquid storage chamber (18) is provided with a second filter screen (14), which divides the original liquid storage chamber (18) into a first chamber (1801) and a second chamber (1802). The filter hole diameter of the first filter screen (13) is smaller than that of the filter hole diameter of the second filter screen (14).

3. The traditional Chinese medicine extraction and preparation filtration device according to claim 2, characterized in that, A stirring paddle (15) is rotatably disposed inside the first cavity (1801), and the stirring paddle (15) is provided with a drive motor (5) that drives it to rotate.

4. The traditional Chinese medicine extraction and preparation filtration device according to claim 3, characterized in that, The top of the vertical filter tank (2) is provided with an opening, and the opening is detachably provided with a sealing head (3); The second filter screen (14) is detachably coupled to the vertical filter tank body (2). The stirring paddle (15) and the drive motor (5) are both mounted on the sealing head (3). The second filter screen (14) is mounted on the bottom side of the stirring paddle (15) and rotates with the stirring paddle (15).

5. The traditional Chinese medicine extraction and preparation filtration device according to claim 4, characterized in that, The outer ring of the second filter screen (14) is provided with an annular rubber ring (21) for sealing with the inner wall of the vertical filter tank (2).

6. A traditional Chinese medicine extraction and preparation filtration device according to any one of claims 1-5, characterized in that, The vertical filter tank (2) has an annular water bath chamber (16) arranged in the inner circumference, and the annular water bath chamber (16) is located on the outer periphery of the original liquid storage chamber (18); The annular water bath chamber (16) is connected to an inlet pipe (8) with a valve and an outlet pipe (7).

7. The traditional Chinese medicine extraction and preparation filtration device according to claim 1, characterized in that, The first filter screen (13) has a concave conical structure.

8. The traditional Chinese medicine extraction and preparation filtration device according to claim 7, characterized in that, The first filter screen (13) has a slag discharge port (20) at its center. The bottom of the slag discharge port (20) is connected to a slag discharge box (19). The gravity slag discharge pipe (9) is connected to the slag discharge box (19).

9. A traditional Chinese medicine extraction and preparation filtration device according to claim 8, characterized in that, The gravity-type slag discharge pipe (9) is equipped with a first electric valve (10), and the liquid discharge pipe (11) is equipped with a second valve (12).

10. A traditional Chinese medicine extraction and preparation filtration device according to claim 8, characterized in that, The annular electromagnet (22) with the smallest diameter is disposed inside the slag discharge port (20).

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