Equipment and method for preparing gynura formosana flavone product

Abstract

The invention discloses equipment and a method for preparing a gynura formosana flavone product, the equipment comprises a heating tank, the top of the heating tank is provided with an extraction mechanism, and the bottom of the heating tank is provided with a filtering reflux mechanism; the heating tank comprises a tank body; a flow guide hopper is fixedly mounted at the top of an inner cavity of the tank body; and the extraction mechanism comprises a tank cover mounted at the top of the tank body. The method has the advantage of high efficiency, and solves the problems that when flavone is extracted from the existing gynura formosana, the gynura formosana raw material is inconvenient to efficiently extract, the low-efficiency extraction often needs to repeatedly extract for multiple times or prolong the single time, the production efficiency is reduced, the low-efficiency extraction easily causes insufficient extraction, and the extraction time is shortened. And flavonoid compounds in gynura formosana cells cannot be fully released into the solvent.

Description

Technical Field

[0001] This invention relates to the field of white amaranth processing technology, specifically to a preparation device and method for white amaranth flavonoid products. Background Technology

[0002] Flavonoid products from *Bai Feng Cai* (white phoenix vegetable) refer to products with specific functions or uses made from the flavonoid compounds extracted or enriched from *Bai Feng Cai* raw materials. *Bai Feng Cai* is rich in various bioactive components, among which flavonoids are one of its important active substances. The equipment for preparing *Bai Feng Cai* flavonoid products involves extracting the active components from within the plant. This extraction equipment includes multi-functional extraction tanks, ultrasonic extraction equipment, microwave-assisted extraction equipment, and supercritical fluid extraction equipment. These devices can automatically extract flavonoid components from the *Bai Feng Cai* raw materials, facilitating the subsequent preparation of flavonoid products. Flavonoids are mainly found inside the plant cells of *Bai Feng Cai*, encapsulated by cell walls and cell membranes. Stirring and heating can disrupt the cell structure, promoting rupture and allowing the flavonoids to dissolve in the extract.

[0003] Existing methods for extracting flavonoids from white amaranth are not conducive to efficient extraction of the raw material. Inefficient extraction often requires repeated extractions or extended extraction times, reducing production efficiency. Moreover, inefficient extraction can easily lead to insufficient extraction, as the flavonoids in the white amaranth cells are not fully released into the solvent. Summary of the Invention

[0004] The purpose of this invention is to provide a preparation equipment and method for flavonoid products from *Gnaphalium affine*, which has the advantages of high efficiency. It solves the problem that existing methods for extracting flavonoids from *Gnaphalium affine* are not convenient for efficient extraction of the raw material. Inefficient extraction often requires repeated extractions or extended extraction times, which reduces production efficiency. Moreover, inefficient extraction can easily lead to insufficient extraction, and the flavonoids in the *Gnaphalium affine* cells are not fully released into the solvent.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a preparation device for flavonoid products of white amaranth, comprising a heating tank, wherein an extraction mechanism is installed at the top of the heating tank and a filtration and reflux mechanism is installed at the bottom of the heating tank;

[0006] The heating tank includes a tank body, and a guide bucket is fixedly installed on the top of the inner cavity of the tank body;

[0007] The extraction mechanism includes a can lid installed on the top of the can body, a first motor installed on the top of the can lid, and the output shaft of the first motor extends into the inner cavity of the can lid and is equipped with an extraction component.

[0008] The filtration and reflux mechanism includes a filter tank installed at the bottom of the tank body, a reflux tank connected to the bottom of the filter tank, a reflux pipe connected to the surface of the reflux tank, and the liquid outlet end of the reflux pipe connected to the inner cavity of the tank body.

[0009] As a preferred preparation device for the flavonoid product of *Gnaphalium affine* according to the present invention, the surface of the tank is equipped with an electric heating jacket and a temperature sensor, and the detection end of the temperature sensor extends into the inner cavity of the tank.

[0010] As a preferred preparation device for the flavonoid product of *Gnaphalium affine* according to the present invention, a fixing ring is fixedly sleeved on the top of the tank surface, and a support leg is fixedly connected to the bottom of the fixing ring.

[0011] As a preferred preparation device for the flavonoid product of *Gnaphalium affine* according to the present invention, a threaded seat is fixedly connected to the top of the inner wall of the tank, and a threaded sleeve is fixedly connected to the bottom of the inner wall of the tank cover, with the threaded sleeve threadedly fitted onto the threaded seat.

[0012] As a preferred preparation device for the flavonoid product of *Gnaphalium affine* according to the present invention, a pressure relief valve and a feed inlet are also fixedly installed on the top of the tank cover, and the liquid outlet end of the feed inlet and the air inlet end of the pressure relief valve extend into the inner cavity of the tank cover.

[0013] As a preferred preparation device for the flavonoid product of *Gnaphalium affine* according to the present invention, the extraction component includes a connecting rod, which is mounted on the output shaft of a first motor via a coupling. A mesh cylinder is installed at the bottom of the connecting rod, and the mesh cylinder holds the *Gnaphalium affine* raw material particles. A reinforcing rod is fixedly installed inside the mesh cylinder, and a through hole is opened at the top of the mesh cylinder. An arc-shaped mesh plate is arranged around the surface of the mesh cylinder.

[0014] As a preferred preparation device for the flavonoid product of *Gnaphalium affine* according to the present invention, the number of reflux pipes is several, an inlet sleeve is fixedly installed on the surface of the tank, and the liquid outlet end of the reflux pipe is installed inside the inlet sleeve and communicates with the top of the inner cavity of the tank.

[0015] As a preferred preparation device for the flavonoid product of *Gnaphalium affine* according to the present invention, the surface of the filter tank is connected to a drain valve, the surface of the reflux tank is connected to a drain valve, a second motor is fixedly connected to the bottom of the reflux tank, the output shaft of the second motor extends into the inner cavity of the reflux tank and a rotating drum is fixedly installed thereon, the surface of the rotating drum is provided with spiral blades, and the spiral blades transport the extract in the inner cavity of the reflux tank to the reflux pipe.

[0016] As a preferred preparation device for the flavonoid product of *Gnaphalium affine* according to the present invention, the inner wall of the filter tank is fixedly connected to a limiting seat, and a conical rotating bucket is rotatably connected inside the limiting seat. A filter screen is installed around the surface of the conical rotating bucket, and a support rod is fixedly connected to the middle of the bottom of the conical rotating bucket. The bottom of the support rod is fixedly connected to the top of the rotating drum for transmission. An installation rod is fixedly connected to the top of the conical rotating bucket, and several stirring blades are installed around the surface of the installation rod. The stirring blades are inclined downwards at an angle of 30-45°. The several stirring blades are located at the bottom of the inner cavity of the tank to guide the extract into the filter tank.

[0017] A method for preparing a flavonoid product from *Gnaphalium affine* includes the following steps:

[0018] S1. The can lid is opened and closed by the threaded sleeve and the threaded seat. The can lid is removed manually, and the pre-treated white amaranth raw material is put into the mesh cylinder through the through hole. The mesh cylinder is a detachable structure. The connecting rod is installed on the output shaft of the first motor by the coupling. Then the mesh cylinder is put into the inner cavity of the can body, and the threaded sleeve is screwed into the surface of the threaded seat to connect the can body and the can lid.

[0019] S2. Add a measured amount of extraction solvent into the tank through the feed inlet. The extraction solvent is ethanol, water, or a mixture of ethanol and water. The surface of the extraction solvent must cover the raw material in the mesh cylinder.

[0020] S3. The first motor is started by the control system. The output shaft of the first motor drives the mesh cylinder to rotate through the connecting rod. The extraction solvent enters the mesh cylinder through the arc-shaped mesh plate and then comes into contact with the white phoenix vegetable raw material inside the mesh cylinder. The white phoenix vegetable raw material and the extraction solvent are stirred and contacted inside the mesh cylinder to extract the flavonoid components in the white phoenix vegetable raw material.

[0021] S4. During the extraction process, the extraction solvent is heated. The electric heating mantle is turned on by the temperature controller to heat the tank. The temperature sensor monitors the internal temperature in real time and feeds it back to the temperature controller to control the electric heating mantle to maintain the set temperature.

[0022] S5. Start the filtration and reflux mechanism for dynamic circulation extraction. The output shaft of the second motor drives the rotating drum and its spiral blades to rotate. The rotating drum drives the stirring blades to rotate synchronously through the support rod, the conical rotating bucket and the mounting rod. The stirring blades are designed to be inclined downwards at 30–45°. When rotating, they generate a downward axial flow, which strongly guides the solvent inside the tank into the filtration tank, thereby breaking the concentration gradient and improving the extraction efficiency. In the filtration tank, the liquid undergoes preliminary filtration through the filter screen on the surface of the conical rotating bucket to remove large particulate impurities. The filtered clear liquid enters the reflux tank and is pushed to the reflux pipe by the spiral blades.

[0023] S6. The reflux liquid is sprayed to the top of the tank through the water inlet jacket, and evenly distributed through the guide bucket. It then re-enters the screen cylinder to achieve dynamic solvent circulation. During the rotation of the conical rotating bucket, the filter screen is rotated simultaneously to perform self-cleaning and reduce the risk of clogging. After the set time is reached, the electric heating jacket, the first motor and the second motor are turned off.

[0024] S7. When it is necessary to remove the extract, open the drain valve to discharge the filtered flavonoid extract from the reflux tank and send it to the subsequent concentration equipment for solvent recovery and concentration. After discharge, open the tank cover, remove the remaining white ginseng residue from the mesh cylinder, then reset the extraction mechanism and open the drain valve. Inject the cleaning solution into the tank through the feed port, repeat the stirring and circulation to automatically clean the equipment, and discharge the residue trapped inside the equipment through the drain valve. After cleaning, dry the equipment to prepare for the next extraction.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. This invention significantly improves the extraction efficiency and product quality of flavonoids from *Gynostemma pentaphyllum* by integrating heating extraction, dynamic filtration, and solvent reflux functions. The equipment uses extraction components to concentrate the raw materials in a permeable container. An arc-shaped mesh plate allows the extraction solvent to enter and prevents the *Gynostemma pentaphyllum* raw materials from spilling out. The arc-shaped mesh plate rotates with the mesh cylinder, effectively preventing clogging by residue. Simultaneously, a downward-sloping (30–45°) stirring blade at the bottom, driven by a conical rotating bucket, generates forced downward flow, promoting solvent penetration through the filter, breaking the concentration gradient, enhancing the mass transfer process, and increasing the flavonoid dissolution rate and extraction rate. Combined with electric heating and a closed-loop temperature control system with a temperature sensor, precise control of the extraction temperature is achieved, preventing degradation of heat-sensitive components and ensuring the stability and safety of the extraction process.

[0027] 2. This invention constructs an integrated process for dynamic circulation extraction and filtration. Driven by a second motor, the extract enters the reflux tank after preliminary filtration through a conical rotating bucket and a filter screen. It is then pushed to the reflux pipe by spiral blades and sprayed back from the top of the tank, forming a continuous solvent circulation. This design not only reduces solvent consumption and improves utilization, but also achieves self-cleaning through the filter and its rotating mechanism, effectively reducing the risk of clogging. The machine has a compact structure, is easy to operate, and supports automatic liquid and slag discharge and online cleaning, greatly improving production continuity and cleaning efficiency. It is suitable for the efficient, environmentally friendly, and large-scale preparation of plant flavonoids such as those from *Gnaphalium affine*. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention;

[0029] Figure 2 This is a cross-sectional view of the present invention;

[0030] Figure 3This is a schematic diagram of the heating tank structure of the present invention;

[0031] Figure 4 This is a cross-sectional view of the heating tank of the present invention;

[0032] Figure 5 This is a cross-sectional view of the extraction mechanism of the present invention;

[0033] Figure 6 This is a schematic diagram of the filter recirculation mechanism of the present invention;

[0034] Figure 7 This is a cross-sectional view of the filter recirculation mechanism of the present invention.

[0035] In the diagram: 1. Heating tank; 2. Extraction mechanism; 3. Filtration and reflux mechanism; 101. Tank body; 102. Electric heating jacket; 103. Temperature sensor; 104. Fixing ring; 105. Support leg; 106. Water inlet jacket; 107. Threaded seat; 108. Guide hopper; 201. Tank cover; 202. First motor; 203. Feed inlet; 204. Through hole; 205. Reinforcing rod; 206. Arc-shaped mesh plate; 207. 208. Threaded sleeve; 209. Connecting rod; 210. Pressure relief valve; 301. Filter tank; 302. Drain valve; 303. Drain valve; 304. Second motor; 305. Return tank; 306. Return pipe; 307. Spiral blade; 308. Rotary drum; 309. Limiting seat; 310. Filter screen; 311. Agitator blade; 312. Mounting rod; 313. Conical rotating bucket; 314. Support rod. Detailed Implementation

[0036] Example 1

[0037] Please see Figures 1-7 A device for preparing flavonoid products from white amaranth includes a heating tank 1, an extraction mechanism 2 installed on the top of the heating tank 1, and a filtration and reflux mechanism 3 installed at the bottom of the heating tank 1.

[0038] Furthermore, the heating tank 1 includes a tank body 101, and a guide bucket 108 is fixedly installed on the top of the inner cavity of the tank body 101.

[0039] Furthermore, an electric heating jacket 102 and a temperature sensor 103 are installed on the surface of the tank 101, with the detection end of the temperature sensor 103 extending into the inner cavity of the tank 101.

[0040] Furthermore, a fixing ring 104 is fixedly sleeved on the top surface of the tank body 101, and a support leg 105 is fixedly connected to the bottom of the fixing ring 104.

[0041] Furthermore, a threaded seat 107 is fixedly connected to the top of the inner wall of the tank body 101, and a threaded sleeve 208 is fixedly connected to the bottom of the inner wall of the tank cover 201. The threaded sleeve 208 is threaded onto the threaded seat 107.

[0042] Furthermore, the output terminal of the temperature sensor 103 is electrically connected to a temperature controller, and the detection signal is transmitted to the temperature controller. The temperature controller adjusts the heating power of the electric heating jacket 102 according to the detected temperature and the preset temperature to keep the extract liquid inside the tank 101 at a constant temperature.

[0043] Furthermore, the top surface of the threaded seat 107 is provided with threaded teeth, and the bottom of the threaded sleeve 208 is provided with a threaded groove that cooperates with the threaded teeth.

[0044] Furthermore, the extraction mechanism 2 includes a can lid 201 installed on the top of the can body 101, a first motor 202 installed on the top of the can lid 201, and the output shaft of the first motor 202 extends into the inner cavity of the can lid 201 and is equipped with an extraction component.

[0045] Furthermore, a pressure relief valve 210 and a feed inlet 203 are also fixedly installed on the top of the can lid 201. The liquid outlet end of the feed inlet 203 and the air inlet end of the pressure relief valve 210 extend into the inner cavity of the can lid 201.

[0046] Furthermore, the extraction component includes a connecting rod 209, which is mounted on the output shaft of the first motor 202 via a coupling. A mesh cylinder 207 is installed at the bottom of the connecting rod 209, and the mesh cylinder 207 holds the raw material particles of white amaranth. A reinforcing rod 205 is fixedly installed inside the mesh cylinder 207, and a through hole 204 is opened at the top of the mesh cylinder 207. An arc-shaped mesh plate 206 is arranged around the surface of the mesh cylinder 207.

[0047] Furthermore, the threaded sleeve 208 is provided with a tapered guide cavity, so that the extract discharged from the feed port 203 enters the through hole 204.

[0048] Furthermore, there are several return pipes 306. A water inlet sleeve 106 is fixedly installed on the surface of the tank body 101. The liquid outlet end of the return pipe 306 is installed inside the water inlet sleeve 106 and communicates with the top of the inner cavity of the tank body 101.

[0049] Furthermore, the filtration reflux mechanism 3 includes a filter tank 301 installed at the bottom of the tank body 101, a reflux tank 305 connected to the bottom of the filter tank 301, a reflux pipe 306 connected to the surface of the reflux tank 305, and the liquid outlet end of the reflux pipe 306 connected to the inner cavity of the tank body 101.

[0050] Furthermore, a drain valve 302 is connected to the surface of the filter tank 301, and a drain valve 303 is connected to the surface of the return tank 305. A second motor 304 is fixedly connected to the bottom of the return tank 305. The output shaft of the second motor 304 extends into the inner cavity of the return tank 305 and a rotating drum 308 is fixedly installed thereon. The surface of the rotating drum 308 is provided with spiral blades 307. The spiral blades 307 transport the extract in the inner cavity of the return tank 305 to the return pipe 306.

[0051] Furthermore, a limiting seat 309 is fixedly connected to the inner wall of the filter tank 301. A conical rotating bucket 313 is rotatably connected inside the limiting seat 309. A filter screen 310 is installed around the surface of the conical rotating bucket 313. A support rod 314 is fixedly connected to the middle of the bottom of the conical rotating bucket 313. The bottom of the support rod 314 is fixedly connected to the top of the rotating drum 308 for transmission. An installation rod 312 is fixedly connected to the top of the conical rotating bucket 313. Several stirring blades 311 are installed around the surface of the installation rod 312. The stirring blades 311 are inclined downwards at an angle of 30-45°. The several stirring blades 311 are located at the bottom of the inner cavity of the tank 101 to guide the extract into the filter tank 301.

[0052] Furthermore, the limiting seat 309 and the conical rotating bucket 313 are rotatably connected by bearings, and a sealing ring is provided at the connection between the limiting seat 309 and the conical rotating bucket 313.

[0053] By integrating heating extraction, dynamic filtration, and solvent reflux functions, the extraction efficiency and product quality of flavonoids from *Gynostemma pentaphyllum* are significantly improved. The equipment uses extraction components to concentrate the raw materials in a permeable container. An arc-shaped mesh plate 206 is used to allow the extraction solvent to enter and prevent spillage of the *Gynostemma pentaphyllum* raw materials. The arc-shaped mesh plate 206 rotates with the mesh cylinder 207, effectively preventing clogging by residue. Simultaneously, a downward-inclined stirring blade 311 at the bottom, tilted at 30–45°, generates forced downward flow under the action of a conical rotating bucket 313, promoting solvent penetration through the filter screen 310, breaking the concentration gradient, enhancing the mass transfer process, and improving the flavonoid dissolution rate and extraction rate. Combined with a closed-loop temperature control system using electric heating 102 and a temperature sensor 103, precise control of the extraction temperature is achieved, preventing degradation of heat-sensitive components and ensuring the stability and safety of the extraction process.

[0054] Furthermore, this equipment innovatively constructs an integrated process of dynamic circulation extraction and filtration. Driven by the second motor 304, the extract enters the reflux tank 305 after preliminary filtration through the conical rotating bucket 313 and the filter screen 310. It is then pushed to the reflux pipe 306 by the spiral blades 307 and sprayed back from the top of the tank 101, forming a continuous solvent circulation. This design not only reduces solvent consumption and improves utilization, but also achieves self-cleaning function through the rotation of the filter screen 310, effectively reducing the risk of clogging. The whole machine has a compact structure, is easy to operate, and supports automatic liquid discharge, slag discharge and online cleaning, which greatly improves production continuity and cleaning efficiency. It is suitable for the efficient, environmentally friendly and large-scale preparation of plant flavonoids such as white pine needles.

[0055] Example 2

[0056] Please see Figures 1-7 A method for preparing a flavonoid product from white amaranth includes the following steps:

[0057] S1. The can lid 201 is opened and closed by the threaded sleeve 208 and the threaded seat 107. The can lid 201 is removed manually, and the pre-treated white amaranth raw material is put into the mesh cylinder 207 through the through hole 204. The mesh cylinder 207 is a detachable structure. The connecting rod 209 is installed on the output shaft of the first motor 202 by the coupling. Then the mesh cylinder 207 is put into the inner cavity of the can body 101, and the threaded sleeve 208 is screwed into the surface of the threaded seat 107 to connect the can body 101 and the can lid 201.

[0058] S2. A certain amount of extraction solvent is added into the tank 101 through the feed inlet 203. The extraction solvent is ethanol, water or a mixture of ethanol and water. The surface of the extraction solvent liquid must cover the raw material in the mesh cylinder 207.

[0059] S3. The first motor 202 is started by the control system. The output shaft of the first motor 202 drives the mesh cylinder 207 to rotate through the connecting rod 209. The extraction solvent enters the mesh cylinder 207 through the arc-shaped mesh plate 206 and then comes into contact with the white phoenix vegetable raw material inside the mesh cylinder 207. The white phoenix vegetable raw material and the extraction solvent are stirred and contacted inside the mesh cylinder 207 to extract the flavonoid components in the white phoenix vegetable raw material.

[0060] S4. During the extraction process, the extraction solvent is heated. The electric heating jacket 102 is turned on by the temperature controller to heat the tank 101. The temperature sensor 103 monitors the internal temperature in real time and feeds it back to the temperature controller to control the electric heating jacket 102 to maintain the set temperature.

[0061] S5. Start the filtration reflux mechanism 3 for dynamic circulation extraction. The output shaft of the second motor 304 drives the rotating drum 308 and its spiral blades 307 to rotate. The rotating drum 308 drives the stirring blades 311 to rotate synchronously through the support rod 314, the conical rotating bucket 313 and the mounting rod 312. The stirring blades 311 are designed to be inclined downwards at 30–45°. When rotating, they generate a downward axial flow, which strongly guides the solvent inside the tank 101 into the filter tank 301, thereby breaking the concentration gradient and improving the extraction efficiency. In the filter tank 301, the liquid is initially filtered through the filter screen 310 on the surface of the conical rotating bucket 313 to remove large particulate impurities. The filtered clear liquid enters the reflux tank 305 and is pushed to the reflux pipe 306 by the spiral blades 307.

[0062] S6. The reflux liquid is sprayed onto the top of the tank 101 through the water inlet jacket 106, and evenly distributed through the guide bucket 108. It then re-enters the mesh cylinder 207 to achieve dynamic solvent circulation. During the rotation of the conical rotating bucket 313, the filter screen 310 is rotated simultaneously for self-cleaning, reducing the risk of clogging. After the set time is reached, the electric heating jacket 102, the first motor 202, and the second motor 304 are turned off.

[0063] S7. When it is necessary to remove the extract, open the drain valve 303 to discharge the filtered flavonoid extract in the reflux tank 305 and send it to the subsequent concentration equipment for solvent recovery and concentration. After discharge, open the tank cover 201, remove the residual white pine residue in the mesh cylinder 207, then reset the extraction mechanism 2 and open the drain valve 302. Inject the cleaning solution into the tank 101 through the feed port 203, repeat the stirring and circulation to automatically clean the equipment, and discharge the residue trapped inside the equipment through the drain valve 302. After cleaning, dry the equipment to prepare for the next extraction.

[0064] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A preparation device for flavonoid products from white amaranth, comprising a heating tank (1), characterized in that: An extraction mechanism (2) is installed on the top of the heating tank (1), and a filtration and reflux mechanism (3) is installed on the bottom of the heating tank (1). The heating tank (1) includes a tank body (101), and a guide bucket (108) is fixedly installed on the top of the inner cavity of the tank body (101). The extraction mechanism (2) includes a can lid (201) installed on the top of the can body (101), a first motor (202) is installed on the top of the can lid (201), and the output shaft of the first motor (202) extends into the inner cavity of the can lid (201) and is equipped with an extraction component; The filtration reflux mechanism (3) includes a filter tank (301) installed at the bottom of the tank body (101), a reflux tank (305) connected to the bottom of the filter tank (301), a reflux pipe (306) connected to the surface of the reflux tank (305), and the liquid outlet end of the reflux pipe (306) connected to the inner cavity of the tank body (101).

2. The equipment for preparing flavonoid products from *Gnaphalium affine* according to claim 1, characterized in that: An electric heating jacket (102) and a temperature sensor (103) are installed on the surface of the tank (101), and the detection end of the temperature sensor (103) extends into the inner cavity of the tank (101).

3. The equipment for preparing flavonoid products from *Gnaphalium affine* according to claim 2, characterized in that: A fixing ring (104) is fixedly fitted on the top of the surface of the tank (101), and a support leg (105) is fixedly connected to the bottom of the fixing ring (104).

4. The equipment for preparing flavonoid products from *Gnaphalium affine* according to claim 3, characterized in that: The top of the inner wall of the tank (101) is fixedly connected to a threaded seat (107), and the bottom of the inner wall of the tank cover (201) is fixedly connected to a threaded sleeve (208). The threaded sleeve (208) is threaded onto the threaded seat (107).

5. The equipment for preparing flavonoid products from *Gnaphalium affine* according to claim 4, characterized in that: The top of the can lid (201) is also fixedly installed with a pressure relief valve (210) and a feed inlet (203), with the liquid outlet of the feed inlet (203) and the air inlet of the pressure relief valve (210) penetrating into the inner cavity of the can lid (201).

6. The equipment for preparing flavonoid products from *Gnaphalium affine* according to claim 5, characterized in that: The extraction component includes a connecting rod (209), which is mounted on the output shaft of the first motor (202) via a coupling. A mesh cylinder (207) is installed at the bottom of the connecting rod (209). The mesh cylinder (207) holds the raw material particles of white phoenix vegetable. A reinforcing rod (205) is fixedly installed inside the mesh cylinder (207). A through hole (204) is opened at the top of the mesh cylinder (207). An arc-shaped mesh plate (206) is arranged around the surface of the mesh cylinder (207).

7. The equipment for preparing flavonoid products from *Gnaphalium affine* according to claim 6, characterized in that: The number of return pipes (306) is several. A water inlet sleeve (106) is fixedly installed on the surface of the tank body (101). The liquid outlet end of the return pipe (306) is installed inside the water inlet sleeve (106) and communicates with the top of the inner cavity of the tank body (101).

8. The equipment for preparing flavonoid products from *Gnaphalium affine* according to claim 7, characterized in that: The surface of the filter tank (301) is connected to a drain valve (302), and the surface of the reflux tank (305) is connected to a drain valve (303). A second motor (304) is fixedly connected to the bottom of the reflux tank (305). The output shaft of the second motor (304) extends into the inner cavity of the reflux tank (305) and a rotating drum (308) is fixedly installed thereon. The surface of the rotating drum (308) is provided with spiral blades (307). The spiral blades (307) transport the extract in the inner cavity of the reflux tank (305) to the reflux pipe (306).

9. The equipment for preparing flavonoid products from *Gnaphalium affine* according to claim 8, characterized in that: The filter tank (301) is fixedly connected to the inner wall of the limiting seat (309). The limiting seat (309) is rotatably connected to the conical rotating bucket (313). The surface of the conical rotating bucket (313) is surrounded by a filter screen (310). The bottom of the conical rotating bucket (313) is fixedly connected to the middle of the bottom of the conical rotating bucket (313). The bottom of the support rod (314) is fixedly connected to the top of the rotating drum (308) for transmission. The top of the conical rotating bucket (313) is fixedly connected to the mounting rod (312). Several stirring blades (311) are mounted around the surface of the mounting rod (312). The stirring blades (311) are inclined downwards at an angle of 30-45°. Several stirring blades (311) are located at the bottom of the inner cavity of the tank body (101) to guide the extract into the filter tank (301).

10. A method for preparing a flavonoid product from *Gnaphalium affine*, applicable to the equipment for preparing a flavonoid product from *Gnaphalium affine* as described in claim 9, characterized in that... Includes the following steps: S1. Open and close the can lid (201) using the threaded sleeve (208) and the threaded seat (107). Manually remove the can lid (201) and put the pre-treated white amaranth raw material into the mesh cylinder (207) through the through hole (204). The mesh cylinder (207) is a detachable structure. Install the connecting rod (209) on the output shaft of the first motor (202) through the coupling. Then put the mesh cylinder (207) into the inner cavity of the can body (101) and screw the threaded sleeve (208) into the surface of the threaded seat (107) to connect the can body (101) and the can lid (201). S2. Add a certain amount of extraction solvent into the tank (101) through the feed inlet (203). The extraction solvent is ethanol, water or a mixture of ethanol and water. The surface of the extraction solvent liquid should cover the raw material in the mesh cylinder (207). S3. Start the first motor (202) through the control system. The output shaft of the first motor (202) drives the mesh cylinder (207) to rotate through the connecting rod (209). The extraction solvent enters the mesh cylinder (207) through the arc-shaped mesh plate (206) and then comes into contact with the white phoenix vegetable raw material inside the mesh cylinder (207). The white phoenix vegetable raw material and the extraction solvent are stirred and contacted inside the mesh cylinder (207) to extract the flavonoid components in the white phoenix vegetable raw material. S4. During the extraction process, the extraction solvent is heated. The electric heating mantle (102) is turned on by the temperature controller to heat the tank (101). The temperature sensor (103) monitors the internal temperature in real time and feeds it back to the temperature controller to control the electric heating mantle (102) to maintain the set temperature. S5. Start the filtration reflux mechanism (3) for dynamic cyclic extraction. The output shaft of the second motor (304) drives the rotating drum (308) and its spiral blades (307) to rotate. The rotating drum (308) drives the stirring blades (311) to rotate synchronously through the support rod (314), the conical rotating bucket (313) and the mounting rod (312). The stirring blades (311) are designed to tilt downwards at 30–45°. When rotating, they generate a downward axial flow, which strongly guides the solvent inside the tank (101) to the filter tank (301), thereby breaking the concentration gradient and improving the extraction efficiency. In the filter tank (301), the liquid undergoes preliminary filtration through the filter screen (310) on the surface of the conical rotating bucket (313) to remove large particulate impurities. The filtered clear liquid enters the reflux tank (305) and is pushed to the reflux pipe (306) by the spiral blades (307). S6. The reflux liquid is sprayed onto the top of the tank (101) through the water inlet jacket (106), and evenly distributed through the guide bucket (108). It then re-enters the mesh cylinder (207) to achieve dynamic solvent circulation. During the rotation of the conical rotating bucket (313), the filter screen (310) is rotated simultaneously to perform self-cleaning and reduce the risk of clogging. After the set time is reached, the electric heating jacket (102), the first motor (202), and the second motor (304) are turned off. S7. When it is necessary to remove the extract, open the drain valve (303) to discharge the filtered flavonoid extract in the reflux tank (305) and send it to the subsequent concentration equipment for solvent recovery and concentration. After the discharge is completed, open the tank cover (201) and take out the residual white pine residue in the mesh cylinder (207). Then reset the extraction mechanism (2) and open the drain valve (302). Inject the cleaning liquid into the tank (101) through the feed port (203). Repeat the stirring and circulation to automatically clean the equipment. Discharge the medicine residue trapped inside the equipment through the drain valve (302). After cleaning, dry the equipment to prepare for the next extraction.

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