Extraction and preparation device and extraction method of liquiritin and glycyrrhizic acid of liquorice

Abstract

The invention relates to the technical field of liquorice extraction, and discloses an extraction and preparation device and method for liquiritin and glycyrrhizic acid of liquorice. The extraction and preparation device comprises an extraction tank and a smashing mechanism, the smashing mechanism is fixedly installed on one side of the extraction tank, and a discharging mechanism is fixedly installed at the top end of the extraction tank; a liquid discharging mechanism is fixedly mounted on the side, away from the extraction tank, of the discharging mechanism, a circulating mechanism is fixedly mounted on the other side of the extraction tank, and a separation mechanism is fixedly mounted on the inner side wall of the extraction tank. Through cooperative arrangement of a water suction pump, a water suction pipe, a conveying pipe and an extraction tank, during use, liquid which is uniformly stirred inside is conveyed into the conveying pipe through the water suction pump and the water suction pipe, and then the liquid is conveyed into the extraction tank through the conveying pipe, so that the effect of secondary stirring and filtering of the liquid is achieved; and the working efficiency of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of liquorice extraction, in particular to an extraction preparation device and an extraction method for liquiritin and glycyrrhizic acid of liquorice. Background Art

[0002] Licorice is the dried root or rhizome of the perennial herb Leguminosae plant Licorice. It is a tonic Chinese herbal medicine with the effects of tonifying the spleen and replenishing Qi, clearing away heat and detoxifying, removing phlegm and relieving cough, relieving acute pain and harmonizing various medicines.

[0003] In the prior art, there is a method for extracting and separating liquiritin and glycyrrhizic acid, such as a method disclosed in publication number CN113603737B, which comprises the following steps: S1, mixing an ionic liquid with licorice powder to extract liquiritin and glycyrrhizic acid; S2, after the extraction is completed, separating the solid from the liquid, taking the supernatant, adding a NaOH solution, and then heating the mixture to 65-80° C. to obtain an ionic liquid phase containing liquiritin and an aqueous phase containing glycyrrhizic acid, and separating the aqueous phase and the ionic liquid phase; wherein the ionic liquid is a temperature-responsive ionic liquid.

[0004] The above patent proposes that the existing licorice extraction usually can recycle and reuse the ionic liquid, which is green and environmentally friendly. However, when using, the licorice extraction is mostly a single extraction, which makes the licorice extraction incomplete during the extraction, and leaves too much glycyrrhizin and glycyrrhizic acid inside the licorice, resulting in reduced working efficiency of the device. In addition, when using, the licorice and the ionic liquid are added together into the extraction box for extraction. The two cannot be stirred during the extraction, resulting in licorice agglomeration and reducing the efficiency of the fusion reaction. Therefore, the present invention provides a device and method for extracting and preparing glycyrrhizin and glycyrrhizic acid of licorice. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides an extraction and preparation device and an extraction method for liquiritin and glycyrrhizic acid from licorice, which solves the problems raised in the above background technology.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention provides the following technical solutions: an extraction and preparation device and extraction method for glycyrrhizin and glycyrrhizic acid of licorice, comprising an extraction tank and a crushing mechanism, wherein the crushing mechanism is fixedly installed on one side of the extraction tank, the top of the extraction tank is fixedly installed with a feeding mechanism, the side of the feeding mechanism away from the extraction tank is fixedly installed with a liquid feeding mechanism, the other side of the extraction tank is fixedly installed with a circulation mechanism, and the inner wall of the extraction tank is fixedly installed with a separation mechanism.

[0009] Preferably, a power socket is fixedly installed on one side of the extraction tank, a discharge port is fixedly installed on the other side of the extraction tank, a manual valve is provided on the surface of the discharge port, an electric heating plate is fixedly installed on the inner bottom of the extraction tank, and a support base is fixedly installed on the bottom of the extraction tank.

[0010] Preferably, the crushing mechanism comprises a servo motor, a first rotating rod, a first transmission rod, a stirring blade and a crushing knife, and the servo motor is fixedly mounted on one side of the power socket.

[0011] Preferably, the output end of the servo motor is spline-connected with a first rotating rod, a first transmission rod is fixedly mounted on the end of the first rotating rod away from the servo motor, a plurality of stirring blades are fixedly mounted on the surface of the first transmission rod, and a plurality of crushing knives are fixedly mounted on the surface of the stirring blades.

[0012] Preferably, the unloading mechanism includes a unloading box, a unloading frame, a connecting plate, a motor, a second rotating rod, a second transmission rod and a unloading tray. The unloading box is fixedly installed on the top of the extraction tank, a feed port is opened on the top of the unloading box, and a unloading frame is fixedly installed inside the unloading box, and the unloading frame is directly below the feed port.

[0013] Preferably, a connecting plate is fixedly installed on the inner side wall of the unloading frame, a motor is fixedly installed on the bottom end of the connecting plate, a second rotating rod is spline-connected to the output end of the motor, a second transmission rod is fixedly installed on the end of the second rotating rod away from the motor, and a plurality of unloading trays are fixedly installed on the surface of the second transmission rod, and the unloading trays have different sizes.

[0014] Preferably, the liquid discharge mechanism includes an ionic liquid storage box, a liquid inlet, a drain pipe and a first solenoid valve, the ionic liquid storage box is fixedly installed on the side of the discharge box away from the extraction tank, the top of the ionic liquid storage box is fixedly installed with a liquid inlet, the bottom of the ionic liquid storage box is fixedly installed with a drain pipe, and the first solenoid valve is arranged inside the drain pipe.

[0015] Preferably, the circulation mechanism comprises a fixed support plate, a protective shell, a water pump, a water pumping pipe and a delivery pipe, a fixed support plate is fixedly installed on the other side of the extraction tank, and a protective shell is fixedly installed on the top of the fixed support plate;

[0016] The upper and lower ends of the protective shell are both provided with pipe connection ports, a water pump is placed inside the protective shell, a water pump is fixedly installed at the bottom end of the water pump, a delivery pipe is fixedly installed at the top end of the water pump, and one end of the water pump and the delivery pipe are both installed inside the extraction tank.

[0017] Preferably, the separation mechanism includes a partition plate, a circular row of holes, a filter, a pipe and a solenoid valve, the inner wall of the extraction tank is fixedly installed with a partition plate, the inner wall of the partition plate is provided with a circular row of holes, the inner wall of the circular row of holes is fixedly installed with a filter, the bottom of the circular row of holes is fixedly installed with a pipe, and the inside of the pipe is fixedly installed with a second solenoid valve.

[0018] A method for extracting and preparing liquiritigenin and glycyrrhizic acid from liquorice, comprising the following steps:

[0019] S1, pouring the licorice raw material powder into the inside of the unloading frame inside the unloading box, the motor external power supply drives the second rotating rod to rotate, the second rotating rod drives the second transmission rod to rotate, the second transmission rod drives the unloading plate to rotate, the licorice is evenly unloaded, and the licorice raw material is discharged from the inside of the unloading frame;

[0020] S2, opening the first solenoid valve to discharge the ionic liquid in the ionic liquid storage tank through the ionic liquid discharge pipe;

[0021] S3, driving the first rotating rod and the first transmission rod to rotate through the servo motor external power supply, and then driving the stirring blade to rotate through the first transmission rod, and then driving the crushing blade to rotate through the stirring blade to evenly stir the licorice and the ionic liquid;

[0022] S4, open the second solenoid valve, filter the mixed liquid through the filter screen, and discharge the mixed liquid through the inside of the pipeline;

[0023] S5, inserting a power plug into a power socket, thereby supplying power to the electric heating plate for heating, and extracting the licorice mixture;

[0024] S6, transporting the mixed liquid after stirring evenly inside to the delivery pipe through the pump and the pump pipe, and then transporting the liquid to the extraction tank through the delivery pipe to circulate and extract the licorice mixed liquid;

[0025] S7, after the extraction is completed, the solid and liquid are separated, the supernatant is taken, a NaOH solution is added, and then the temperature is raised to 65-80° C. to obtain an ionic liquid phase containing liquiritin and an aqueous phase containing glycyrrhizic acid, and the aqueous phase and the ionic liquid phase are separated;

[0026] S8, adding tannic acid aqueous solution to the ionic liquid phase, and then performing solid-liquid separation to obtain liquiritin and ionic liquid.

[0027] (III) Beneficial effects

[0028] Compared with the prior art, the present invention provides a device and method for extracting and preparing liquiritin and glycyrrhizic acid from licorice, which has the following beneficial effects:

[0029] 1. The present invention cooperates with a water pump, a water pipe, a delivery pipe and an extraction tank. When in use, the liquid after internal stirring is evenly delivered to the delivery pipe through the water pump and the water pipe, and then the liquid is delivered to the extraction tank through the delivery pipe, thereby achieving a secondary stirring and filtering effect on the liquid, thereby improving the working efficiency of the device.

[0030] 2. The present invention cooperates with a servo motor, a first rotating rod, a first transmission rod, a stirring blade and a crushing knife. When in use, the servo motor external power supply drives the first rotating rod and the first transmission rod to rotate, and then the first transmission rod drives the stirring blade to rotate, and then the stirring blade drives the crushing knife to rotate, thereby playing a role in uniformly stirring the licorice and the ionic liquid, preventing the licorice from agglomerating and reducing the efficiency of the fusion reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the present invention;

[0032] Figure 2 It is a cross-sectional view of the structure of the present invention;

[0033] Figure 3 It is a schematic diagram of the disassembly of the connection structure between the servo motor and the crushing knife of the present invention;

[0034] Figure 4 It is a schematic diagram of the connection structure between the motor and the feed tray of the present invention;

[0035] Figure 5 This is a schematic diagram of the connection structure between the protective shell and the delivery pipe of the present invention;

[0036] Figure 6 For the present invention Figure 2 A magnified view of the structure in the middle.

[0037] In the figure: 1. extraction tank; 2. crushing mechanism; 3. feeding mechanism; 4. liquid feeding mechanism; 5. circulation mechanism; 6. separation mechanism; 7. power socket; 8. discharge port; 9. manual valve; 10. electric heating plate; 11. support base; 12. servo motor; 13. first rotating rod; 14. first transmission rod; 15. stirring blade; 16. crushing knife; 17. feeding box; 18. feeding frame; 19. connecting plate; 20. motor; 21. second rotating rod; 22. second transmission rod; 23. feeding tray; 24. ionic liquid storage box; 25. liquid inlet; 26. discharge pipe; 27. first solenoid valve; 28. fixed support plate; 29. ​​protective shell; 30. water pump; 31. water pipe; 32. delivery pipe; 33. partition plate; 34. circular row holes; 35. filter screen; 36. pipeline; 37. second solenoid valve. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Example 1

[0040] See also Figure 1-3 The present invention provides a technical solution: an extraction and preparation device and extraction method of licorice glycoside and glycyrrhizic acid, comprising an extraction tank 1 and a crushing mechanism 2, wherein the crushing mechanism 2 is fixedly installed on one side of the extraction tank 1, a feeding mechanism 3 is fixedly installed on the top of the extraction tank 1, a liquid feeding mechanism 4 is fixedly installed on the side of the feeding mechanism 3 away from the extraction tank 1, a circulation mechanism 5 is fixedly installed on the other side of the extraction tank 1, a separation mechanism 6 is fixedly installed on the inner side wall of the extraction tank 1, a power socket 7 is fixedly installed on one side of the extraction tank 1, a discharge port 8 is fixedly installed on the other side of the extraction tank 1, a manual valve 9 is arranged on the surface of the discharge port 8, an electric heating plate 10 is fixedly installed on the inner bottom of the extraction tank 1, a supporting base 11 is fixedly installed on the bottom of the extraction tank 1, the crushing mechanism 2 comprises a servo motor 12, a first A rotating rod 13, a first transmission rod 14, a stirring blade 15 and a crushing knife 16, a servo motor 12 is fixedly installed on one side of the power socket 7, the output end of the servo motor 12 is spline-connected with the first rotating rod 13, the end of the first rotating rod 13 away from the servo motor 12 is fixedly installed with the first transmission rod 14, a plurality of stirring blades 15 are fixedly installed on the surface of the first transmission rod 14, a plurality of crushing knives 16 are fixedly installed on the surface of the stirring blade 15, the unloading mechanism 3 includes a unloading box 17, a unloading frame 18, a connecting plate 19, a motor 20, a second rotating rod 21, a second transmission rod 22 and a unloading tray 23, a unloading box 17 is fixedly installed on the top of the extraction tank 1, a feed port is opened on the top of the unloading box 17, a unloading frame 18 is fixedly installed inside the unloading box 17, and the unloading frame 18 is directly below the feed port.

[0041] In this embodiment, through the coordinated setting of the power socket 7 and the electric heating plate 10, when in use, the personnel insert the power plug into the power socket 7, and then power and heat the electric heating plate 10, so that the temperature-responsive ionic liquid is used as an extractant, and the system temperature is changed after the extraction is completed, so that the separation of glycyrrhizin and glycyrrhizic acid can be achieved. Through the coordinated setting of the servo motor 12, the first rotating rod 13, the first transmission rod 14, the stirring blade 15 and the crushing knife 16, when in use, the servo motor 12 is connected to an external power source to drive the first rotating rod 13 and the first transmission rod 14 to rotate, and then the stirring blade 15 is driven to rotate by the first transmission rod 14, and then The stirring blade 15 drives the crushing knife 16 to rotate, thereby playing a role in uniformly stirring the licorice and the ionic liquid, preventing the licorice from agglomerating and reducing the efficiency of the fusion reaction. Through the coordinated arrangement of the discharge box 17, the motor 20, the second rotating rod 21, the second transmission rod 22 and the discharge tray 23, the processed licorice is placed in the discharge box 17 when in use, and then the second rotating rod 21 is driven to rotate by the external power supply of the motor 20, and then the second rotating rod 21 drives the second transmission rod 22 to rotate, and the discharge tray 23 is driven to rotate by the second transmission rod 22, thereby playing a role in uniformly discharging the licorice and preventing blockage.

[0042] Example 2

[0043] like Figure 4-6As shown, based on the same concept as the above-mentioned embodiment 1, this embodiment further proposes that a connecting plate 19 is fixedly installed on the inner side wall of the unloading frame 18, a motor 20 is fixedly installed on the bottom end of the connecting plate 19, a second rotating rod 21 is spline-connected to the output end of the motor 20, a second transmission rod 22 is fixedly installed on the end of the second rotating rod 21 away from the motor 20, a plurality of unloading trays 23 are fixedly installed on the surface of the second transmission rod 22, and the unloading trays 23 have different sizes. The liquid unloading mechanism 4 includes an ionic liquid storage box 24, a liquid inlet 25, a drain pipe 26 and a first solenoid valve 27. The side of the unloading box 17 away from the extraction tank 1 is fixedly installed with an ionic liquid storage box 24, a liquid inlet 25 is fixedly installed on the top of the ionic liquid storage box 24, a drain pipe 26 is fixedly installed on the bottom end of the ionic liquid storage box 24, and a first solenoid valve 27 is arranged inside the drain pipe 26. The circulation mechanism 5 includes a fixed support plate 28, a protective shell 29, a water pump 30, a water pump pipe 31 and a delivery pipe 32. A fixed support plate 28 is fixedly installed on the other side of the extraction tank 1. A protective shell 29 is fixedly installed on the top of the fixed support plate 28. Pipe connection ports are provided at the upper and lower ends of the protective shell 29. A water pump 30 is placed inside the protective shell 29. A water pump 31 is fixedly installed on the bottom end of the water pump 30. A delivery pipe 32 is fixedly installed on the top of the water pump 30. One ends of the water pump 31 and the delivery pipe 32 are both installed inside the extraction tank 1. The separation mechanism 6 includes a partition plate 33, a circular row of holes 34, a filter screen 35, a pipe 36 and a solenoid valve 37. A partition plate 33 is fixedly installed on the inner side wall of the extraction tank 1. A circular row of holes 34 are provided on the inner side wall of the partition plate 33. A filter screen 35 is fixedly installed on the inner side wall of the circular row of holes 34. A pipe 36 is fixedly installed on the bottom of the circular row of holes 34. A second solenoid valve 37 is fixedly installed inside the pipe 36.

[0044] In this embodiment, through the coordinated arrangement of the ionic liquid storage box 24, the drain pipe 26 and the first solenoid valve 27, when in use, the personnel transports the ionic liquid to the ionic liquid storage box 24, and then the personnel remotely opens the first solenoid valve 27, and then the ionic liquid is discharged through the drain pipe 26, thereby achieving the effect of quantitative discharge of the ionic liquid. Through the coordinated arrangement of the water pump 30, the water pipe 31, the delivery pipe 32 and the extraction tank 1, when in use, the liquid after internal stirring is evenly transported to the delivery pipe 32 through the water pump 30 and the water pipe 31, and then the liquid is transported to the extraction tank 1 through the delivery pipe 32, thereby achieving the effect of secondary stirring and filtering of the liquid, thereby improving the working efficiency of the device. Through the coordinated arrangement of the filter screen 35, the pipeline 36 and the second solenoid valve 37, when in use, the personnel controls the second solenoid valve 37, and then the liquid is discharged from the pipeline 36 through the filter screen 35, thereby achieving the effect of filtering the liquid to prevent larger particles from entering.

[0045] Example 3

[0046] like Figure 1-6 As shown, a method for extracting and preparing liquiritin and glycyrrhizic acid from licorice comprises the following steps:

[0047] S1, pour the licorice raw material powder into the inside of the blanking frame 18 inside the blanking box 17, the motor 20 is connected to the external power supply to drive the second rotating rod 21 to rotate, the second rotating rod 21 drives the second transmission rod 22 to rotate, and the second transmission rod 22 drives the blanking plate 23 to rotate, the licorice is uniformly discharged, and the licorice raw material is discharged from the inside of the blanking frame 18;

[0048] S2, opening the first solenoid valve 27, and discharging the ionic liquid in the ionic liquid storage tank 24 through the ionic liquid discharge pipe 26;

[0049] S3, the servo motor 12 is connected to an external power source to drive the first rotating rod 13 and the first transmission rod 14 to rotate, and then the first transmission rod 14 drives the stirring blade 15 to rotate, and then the stirring blade 15 drives the crushing blade 16 to rotate, so that the licorice and the ionic liquid are evenly stirred;

[0050] S4, opening the second solenoid valve 37, the mixed liquid is filtered through the filter screen 35, and the mixed liquid is discharged through the inside of the pipeline 36;

[0051] S5, inserting the power plug into the power socket 7, thereby supplying power to the electric heating plate 10 for heating, and extracting the liquorice mixture;

[0052] S6, the mixed liquid after being stirred evenly inside is transported to the delivery pipe 32 through the pump 30 and the pump pipe 31, and then the liquid is transported to the extraction tank 1 through the delivery pipe 32, and the licorice mixed liquid is circulated and extracted;

[0053] S7, after the extraction is completed, the solid and liquid are separated, the supernatant is taken, a NaOH solution is added, and then the temperature is raised to 65-80° C. to obtain an ionic liquid phase containing liquiritin and an aqueous phase containing glycyrrhizic acid, and the aqueous phase and the ionic liquid phase are separated;

[0054] S8, adding tannic acid aqueous solution to the ionic liquid phase, and then performing solid-liquid separation to obtain liquiritin and ionic liquid.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for extracting and preparing liquiritin and glycyrrhizic acid from liquorice, comprising an extraction tank (1) and a crushing mechanism (2), characterized in that: A crushing mechanism (2) is fixedly mounted on one side of the extraction tank (1), a feeding mechanism (3) is fixedly mounted on the top of the extraction tank (1), a liquid feeding mechanism (4) is fixedly mounted on the side of the feeding mechanism (3) away from the extraction tank (1), a circulation mechanism (5) is fixedly mounted on the other side of the extraction tank (1), and a separation mechanism (6) is fixedly mounted on the inner wall of the extraction tank (1).

2. The device for extracting and preparing liquiritin and glycyrrhizic acid from liquorice according to claim 1, characterized in that: A power socket (7) is fixedly mounted on one side of the extraction tank (1), a discharge port (8) is fixedly mounted on the other side of the extraction tank (1), a manual valve (9) is provided on the surface of the discharge port (8), an electric heating plate (10) is fixedly mounted on the inner bottom of the extraction tank (1), and a support base (11) is fixedly mounted on the bottom of the extraction tank (1).

3. The device for extracting and preparing liquiritigenin and glycyrrhizic acid from liquorice according to claim 1, characterized in that: The crushing mechanism (2) comprises a servo motor (12), a first rotating rod (13), a first transmission rod (14), a stirring blade (15) and a crushing knife (16); the servo motor (12) is fixedly mounted on one side of the power socket (7).

4. The device for extracting and preparing liquiritigenin and glycyrrhizic acid from liquorice according to claim 3, characterized in that: The output end of the servo motor (12) is spline-connected with a first rotating rod (13); an end of the first rotating rod (13) away from the servo motor (12) is fixedly mounted with a first transmission rod (14); a plurality of stirring blades (15) are fixedly mounted on the surface of the first transmission rod (14); and a plurality of crushing knives (16) are fixedly mounted on the surface of the stirring blades (15).

5. The device for extracting and preparing liquiritigenin and glycyrrhizic acid from liquorice according to claim 1, characterized in that: The unloading mechanism (3) comprises an unloading box (17), an unloading frame (18), a connecting plate (19), a motor (20), a second rotating rod (21), a second transmission rod (22) and an unloading plate (23); the unloading box (17) is fixedly mounted on the top of the extraction tank (1); a feed inlet is provided at the top of the unloading box (17); a unloading frame (18) is fixedly mounted inside the unloading box (17); and the unloading frame (18) is directly below the feed inlet.

6. The device for extracting and preparing liquiritigenin and glycyrrhizic acid from liquorice according to claim 5, characterized in that: A connecting plate (19) is fixedly mounted on the inner side wall of the material discharge frame (18); a motor (20) is fixedly mounted on the bottom end of the connecting plate (19); a second rotating rod (21) is spline-connected to the output end of the motor (20); a second transmission rod (22) is fixedly mounted on the end of the second rotating rod (21) away from the motor (20); a plurality of material discharge trays (23) are fixedly mounted on the surface of the second transmission rod (22); and the material discharge trays (23) have different sizes.

7. The device for extracting and preparing liquiritigenin and glycyrrhizic acid from liquorice according to claim 1, characterized in that: The liquid discharge mechanism (4) comprises an ionic liquid storage box (24), a liquid inlet (25), a liquid discharge pipe (26) and a first solenoid valve (27); the ionic liquid storage box (24) is fixedly mounted on a side of the discharge box (17) away from the extraction tank (1); the liquid inlet (25) is fixedly mounted on the top end of the ionic liquid storage box (24); the liquid discharge pipe (26) is fixedly mounted on the bottom end of the ionic liquid storage box (24); and the first solenoid valve (27) is arranged inside the liquid discharge pipe (26).

8. The device for extracting and preparing liquiritin and glycyrrhizic acid from liquorice according to claim 1, characterized in that: The circulation mechanism (5) comprises a fixed support plate (28), a protective shell (29), a water pump (30), a water pumping pipe (31) and a delivery pipe (32); the other side of the extraction tank (1) is fixedly mounted with a fixed support plate (28), and the top end of the fixed support plate (28) is fixedly mounted with a protective shell (29); The upper and lower ends of the protective shell (29) are both provided with pipeline connection ports, a water pump (30) is placed inside the protective shell (29), a water pump (31) is fixedly installed at the bottom end of the water pump (30), and a delivery pipe (32) is fixedly installed at the top end of the water pump (30), and one end of the water pump (31) and the delivery pipe (32) are both installed inside the extraction tank (1).

9. The device for extracting and preparing liquiritigenin and glycyrrhizic acid from liquorice according to claim 1, characterized in that: The separation mechanism (6) comprises a partition plate (33), a circular row of holes (34), a filter screen (35), a pipe (36) and a solenoid valve (37); the partition plate (33) is fixedly mounted on the inner side wall of the extraction tank (1); the inner side wall of the partition plate (33) is provided with a circular row of holes (34); the filter screen (35) is fixedly mounted on the inner side wall of the circular row of holes (34); the pipe (36) is fixedly mounted at the bottom of the circular row of holes (34); and a second solenoid valve (37) is fixedly mounted inside the pipe (36).

10. The method for extracting and preparing liquiritigenin and glycyrrhizic acid from liquorice according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, pouring liquorice raw material powder into the inside of the discharge frame (18) inside the discharge box (17), the motor (20) is connected to an external power supply to drive the second rotating rod (21) to rotate, the second rotating rod (21) drives the second transmission rod (22) to rotate, the second transmission rod (22) drives the discharge plate (23) to rotate, the liquorice is evenly discharged, and the liquorice raw material is discharged from the inside of the discharge frame (18); S2, opening the first solenoid valve (27) to discharge the ionic liquid in the ionic liquid storage tank (24) through the ionic liquid discharge pipe (26); S3, driving the first rotating rod (13) and the first transmission rod (14) to rotate through the servo motor (12) connected to an external power source, and then driving the stirring blade (15) to rotate through the first transmission rod (14), and then driving the crushing blade (16) to rotate through the stirring blade (15), so as to evenly stir the licorice and the ionic liquid; S4, opening the second solenoid valve (37), filtering the mixed liquid through the filter screen (35), and discharging the mixed liquid through the inside of the pipeline (36); S5, inserting a power plug into the power socket (7), thereby supplying power to the electric heating plate (10) for heating, and extracting the liquorice mixture; S6, conveying the mixed liquid after being evenly stirred inside to the conveying pipe (32) through the water pump (30) and the water pipe (31), and then conveying the liquid to the extraction tank (1) through the conveying pipe (32), so as to circulate and extract the liquorice mixed liquid; S7, after the extraction is completed, the solid and liquid are separated, the supernatant is taken, a NaOH solution is added, and then the temperature is raised to 65-80° C. to obtain an ionic liquid phase containing liquiritin and an aqueous phase containing glycyrrhizic acid, and the aqueous phase and the ionic liquid phase are separated; S8, adding tannic acid aqueous solution to the ionic liquid phase, and then performing solid-liquid separation to obtain liquiritin and ionic liquid.

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