Supercritical extraction equipment for Chinese herbal medicines

Abstract

The Chinese herbal medicine supercritical extraction equipment comprises a supporting frame, a mixed extraction mechanism is installed in the middle of the upper end of the supporting frame, material storing and feeding mechanisms are evenly distributed on the periphery of the mixed extraction mechanism in the circumferential direction, and movable connecting pieces are fixed to the upper ends of the material storing and feeding mechanisms; the device is stable in structure and reasonable in design, various Chinese herbal medicine raw materials of different types can be selectively and automatically put according to a co-extract target, co-extraction of various Chinese herbal medicines is achieved, manual feeding is not needed, time and labor are saved, and the efficiency is improved. And the feeding of different Chinese herbal medicine raw materials is driven by only one motor, so that the use number of motors is greatly reduced, the production cost is saved, the heat emission is reduced, and the device is energy-saving and environment-friendly.

Description

Technical Field

[0001] The invention belongs to the technical field of Chinese herbal medicine processing, and relates to an extraction device for Chinese herbal medicine, in particular to a supercritical extraction device for Chinese herbal medicine. Background Technique

[0002] Supercritical refers to supercritical fluid, which is a state that is neither gaseous nor liquid and is between gas and liquid. This substance can only exist when its temperature and pressure exceed the critical point. The density of supercritical fluid is relatively large, similar to that of a liquid, and its viscosity is closer to that of a gas. Therefore, supercritical fluid is an ideal extraction agent. Due to its excellent extraction ability, and the fact that CO2 as an extraction agent can ensure no pollution, no residue, and natural characteristics, the supercritical CO2 extraction technology greatly guarantees the purity, yield, and active ingredient content of Chinese herbal medicine extracts, and has gradually become the mainstream extraction method in Chinese herbal medicine extraction.

[0003] A large number of reports have been made on the combined effects of co-extracts of multiple plants in Chinese medicine extraction. Research shows that co-extraction conforms to the principles of traditional Chinese medicine theory, method, formula, and prescription, and can increase the solubility of active ingredients in drugs, eliminate or weaken the toxicity of certain drugs, generate new substances, exert new therapeutic effects, and exhibit new physiological activities. However, the existing extraction equipment can only achieve the extraction of a single plant, cannot achieve the co-extraction of multiple Chinese herbal medicines, and requires manual frequent elevation of the feeding during the addition of Chinese herbal medicine raw materials, resulting in high labor intensity and low work efficiency. Summary of the Invention

[0004] To solve the technical problems in the background technique, the invention proposes a supercritical extraction device for Chinese herbal medicine, which can selectively and automatically feed different types of multiple Chinese herbal medicine raw materials according to the co-extract target, realizing the co-extraction of multiple Chinese herbal medicines.

[0005] The purpose of the invention can be achieved through the following technical solutions:

[0006] A supercritical extraction device for Chinese herbal medicine, including a support frame. In the middle of the upper end of the support frame, a mixing and extraction mechanism is installed. The periphery of the mixing and extraction mechanism is evenly distributed with storage and feeding mechanisms along the circumferential direction. An active connecting piece is fixed at the upper end of the storage and feeding mechanism, and a feeding driving mechanism matched with the active connecting piece is installed above the mixing and extraction mechanism;

[0007] The support frame includes a circular installation main board. A through hole is vertically penetrated through the center of the installation main board. Installation support boards are evenly distributed along the circumferential direction of the outer periphery of the installation main board, and support columns are provided at the lower ends of the installation support boards;

[0008] The mixing and extraction mechanism includes a tank body. A tank cover is installed at the upper end of the tank body. A mixing and stirring assembly is installed at the center of the tank cover. Feed holes are evenly distributed along the circumferential direction at the upper end of the side wall of the tank body. Fixed seats are evenly distributed along the circumferential direction at the lower end of the side wall of the tank body. The lower ends of the fixed seats are fixedly connected to the upper end of the installation main board. A feed selection assembly is installed at the upper end of the inner wall of the tank body;

[0009] A slag discharge riser is provided at the center of the lower end of the tank body. The lower end of the slag discharge riser passes through the perforation and is connected with a sealing cover. The mixing and stirring assembly includes a first motor installed at the upper end of the tank cover. The output end of the first motor is connected with a stirring vertical shaft. The lower end of the stirring vertical shaft passes through the tank cover and extends into the interior of the slag discharge riser. Stirring blades are installed on the side wall of the stirring vertical shaft located inside the tank body. A first spiral blade is installed on the side wall of the stirring vertical shaft located inside the slag discharge riser;

[0010] A retaining edge is provided at the outer edge of the upper end of the tank body. The feed selection assembly includes a selection ring. The outer wall of the selection ring is slidably connected to the inner wall of the tank body. An external gear ring is provided on the outer side of the upper end of the selection ring. The lower side of the external gear ring is slidably connected to the upper end of the tank body. A driving gear is connected to one place of the external gear ring. A rotating vertical shaft is connected to the center of the driving gear. A fixed cross plate is connected to the outer wall of the tank body. The lower end of the rotating vertical shaft passes through the fixed cross plate and is connected with a second motor. A selection hole is horizontally penetrated and opened at one place of the selection ring;

[0011] The storage and feeding mechanism includes a herbal medicine barrel. The lower end of the herbal medicine barrel is fixedly connected to the upper end of the installation support plate. A semi-circular feeding port is provided at the upper end of the herbal medicine barrel. A semi-circular cover plate for sealing the semi-circular feeding port is hinged to the upper end of the herbal medicine barrel. A handle block is provided at the outer end of the semi-circular cover plate. A vertically distributed feeding riser is installed on one side of the herbal medicine barrel away from the semi-circular feeding port. The lower end of the feeding riser is slightly higher than the inner bottom of the herbal medicine barrel. A feeding vertical shaft is rotatably connected inside the feeding riser. The upper end of the feeding vertical shaft slides out above the herbal medicine barrel. A second spiral blade is provided on the side wall of the feeding vertical shaft. A feeding pipe is communicated with the upper end inside the herbal medicine barrel. The end of the feeding pipe away from the herbal medicine barrel is fixedly connected to the feed hole. A raw material propulsion port connected to the feeding pipe is provided at one place on the side wall of the feeding riser;

[0012] The movable connecting piece includes a connecting circular plate. A connecting square column is provided at the center of the upper end of the connecting circular plate. A lifting connecting column is provided at the lower end of the connecting circular plate. A guiding square hole is opened at the lower end of the lifting connecting column. A guiding square rod is slidably connected inside the guiding square hole. A return spring is fixed at the upper end of the guiding square rod. The upper end of the return spring is fixedly connected to the upper end of the guiding square hole. A fixed block is provided at the lower end of the guiding square rod. The lower end of the fixed block is welded to the upper end of the feeding vertical shaft;

[0013] The feeding drive mechanism includes a protective top plate and a central gear located below the protective top plate. A central shaft vertically penetrates through the center of the central gear. The upper end of the central shaft is rotatably connected to the lower end of the protective top plate. The lower end of the central shaft is connected to a third motor. The lower edge of the protective top plate is evenly distributed with support plates along the circumferential direction. The lower end of the third motor is connected to a fixed circular plate. The outer circumference of the fixed circular plate is evenly distributed with connecting cross plates along the circumferential direction. The outer ends of the connecting cross plates are fixedly connected to the inner walls of the support plates. The outer circumference of the central gear is evenly distributed with feeding transmission gears. The center of the feeding transmission gear vertically penetrates through and is connected to a transmission vertical shaft. The upper end of the transmission vertical shaft is rotatably connected to the protective top plate. The lower end of the transmission vertical shaft slides out below the connecting cross plate. A connecting adjustment component is installed on the support plate;

[0014] A connecting square hole that slidably cooperates with the connecting square column is opened at the lower end of the transmission vertical shaft. A vertically distributed lifting adjustment through groove is horizontally penetrated through the support plate. A positioning cross plate is vertically provided at the upper end outside the lifting adjustment through groove. The connecting adjustment component includes a horizontally distributed U-shaped adjustment plate. The open end of the U-shaped adjustment plate slidably passes through the lifting adjustment through groove and extends into the inner side of the support plate. The upper end of the connecting circular plate is slidably connected to the lower end of the U-shaped adjustment plate. A threaded adjustment rod is vertically penetrated through the outer end of the U-shaped adjustment plate. The threaded adjustment rod is threadedly connected to the U-shaped adjustment plate. The lower end of the threaded adjustment rod is rotatably connected to the upper end of the herb barrel. The upper end of the threaded adjustment rod slidably passes through the positioning cross plate and is connected to a rotating block.

[0015] Further, a notch is opened at one place of the edge, and the driving gear is located at the notch.

[0016] Further, the diameter of the selection hole is the same as that of the feeding hole, and the selection hole and the feeding hole are located on the same horizontal plane.

[0017] Further, a first magnet is fixed to the upper end of the hand-held block, and a second magnet that attracts the first magnet is fixed to the outer end of the positioning cross plate. When adding raw materials, the semi-circular cover plate 32 can be lifted and fixed on the positioning cross plate through the cooperation of the first magnet and the second magnet.

[0018] The beneficial effects of the present invention:

[0019] 1. In this application, the stirring blades in the tank can quickly stir and mix the Chinese herbal medicine raw materials to achieve the co-extraction of various Chinese herbal medicines. The first spiral blade can quickly discharge the extracted Chinese herbal medicine residues. No manual participation is required, that is, the residues are cleaned for the next extraction, and the situation of blockage of the slag discharge riser can be prevented, ensuring smooth slag discharge.

[0020] 2. In the present application, the Chinese herbal medicine raw materials to be put in can be selected through the feeding selection component. When a certain Chinese herbal medicine raw material needs to be put in, the second motor in the feeding selection component is started to make the selection hole coincide with the feeding hole corresponding to this Chinese herbal medicine raw material. Then, the threaded adjusting rod above the herb barrel corresponding to this Chinese herbal medicine raw material is rotated to prompt the U-shaped adjusting plate to move upward. Next, the third motor in the feeding driving mechanism is started to make the feeding vertical shaft and the second spiral blade in the feeding vertical pipe rotate, and the Chinese herbal medicine raw material is sent from the bottom of the herb barrel through the feeding vertical pipe, the material conveying pipe, the feeding hole, and the selection hole into the tank body, thus completing the automatic feeding work of this Chinese herbal medicine raw material, eliminating the need for manual feeding and saving time and effort.

[0021] 3. In the present application, only one motor is used to drive the feeding of different raw materials, greatly reducing the number of motors used. This not only saves production costs but also reduces heat emissions, achieving energy conservation and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the present invention.

[0023] Figure 2 is a structural sectional view of the present invention.

[0024] Figure 3 is a schematic partial structural diagram of the present invention.

[0025] Figure 4 is a partial structural sectional view of the present invention.

[0026] Figure 5 is a schematic partial structural diagram of the present invention.

[0027] Figure 6 is an exploded view of the partial structure of the present invention.

[0028] Figure 7 is a partial structural sectional view of the present invention.

[0029] Figure 8 is an exploded view of the partial structure of the present invention.

[0030] Figure 9 is an exploded view of the partial structure of the present invention.

[0031] Figure 10 is a front view of the partial structure of the present invention.

[0032] Figure 11 is a schematic partial structural diagram of the present invention.

[0033] Figure 12 is an enlarged view of the partial structure of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] As Figure 1 shown, the present invention provides a supercritical extraction device for Chinese herbal medicines, including a support frame 1. In the middle of the upper end of the support frame 1, a mixing extraction mechanism 2 is installed. Along the circumferential direction around the outer periphery of the mixing extraction mechanism 2, a storage and feeding mechanism 3 is evenly distributed. At the upper end of the storage and feeding mechanism 3, a movable connecting piece 4 is fixed. Above the mixing extraction mechanism 2, a feeding driving mechanism 5 that cooperates with the movable connecting piece 4 is installed.

[0036] As Figure 2 shown, the support frame 1 includes an installation main board 11 with a circular structure. A through hole 111 is vertically penetrated through the center of the installation main board 11. Along the circumferential direction around the outer periphery of the installation main board 11, installation support boards 12 are evenly distributed. At the lower end of the installation support board 12, a support column 13 is provided.

[0037] As Figure 3 shown, the mixing extraction mechanism 2 includes a tank body 21. At the upper end of the tank body 21, a tank cover 22 is installed. At the center of the tank cover 22, a mixing and stirring assembly 23 is installed. Along the circumferential direction around the upper end of the side wall of the tank body 21, feeding holes 201 are evenly distributed. Along the circumferential direction around the lower end of the side wall of the tank body 21, fixing seats 211 are evenly distributed. The lower end of the fixing seat 211 is fixedly connected to the upper end of the installation main board 11. At the upper end of the inner wall of the tank body 21, a feeding selection assembly 24 is installed.

[0038] As Figure 4 shown, at the center of the lower end of the tank body 21, a slag discharge riser 212 is provided. The lower end of the slag discharge riser 212 passes through the through hole 111 and is connected to a sealing cover 2121. The mixing and stirring assembly 23 includes a first motor 231 installed at the upper end of the tank cover 22. The output end of the first motor 231 is connected to a stirring vertical shaft 232. The lower end of the stirring vertical shaft 232 passes through the tank cover 22 and extends into the interior of the slag discharge riser 212. On the side wall of the stirring vertical shaft 232 located inside the tank body 21, stirring blades 2321 are installed. On the side wall of the stirring vertical shaft 232 located inside the slag discharge riser 212, a first spiral blade 2322 is installed.

[0039] As Figure 5As shown in the figure, a retaining edge 213 is provided at the outer edge of the upper end of the tank body 21. A notch 2131 is formed at one place of the retaining edge 213. The feeding selection assembly 24 includes a selection ring 241. The outer wall of the selection ring 241 is slidably connected to the inner wall of the tank body 21. An outer gear ring 242 is provided on the outer side of the upper end of the selection ring 241. The lower side of the outer gear ring 242 is slidably connected to the upper end of the tank body 21. A driving gear 243 is connected to one place of the outer gear ring 242. The driving gear 243 is located at the notch 2131. A rotating vertical shaft 2431 is connected to the center of the driving gear 243. A fixed horizontal plate 244 is connected to the outer wall of the tank body 21. The lower end of the rotating vertical shaft 2431 passes through the fixed horizontal plate 244 and is connected to a second motor 245. The second motor 245 is fixedly connected to the outer wall of the tank body 21. A selection hole 2411 is horizontally penetrated through one place of the selection ring 241. The diameter of the selection hole 2411 is the same as that of the feeding hole 201 and the selection hole 2411 and the feeding hole 201 are located on the same horizontal plane.

[0040] As Figure 6 and Figure 7 shown, the storage and feeding mechanism 3 includes a herbal medicine barrel 31. Each herbal medicine barrel 31 corresponds to a feeding hole 201, that is, each kind of Chinese herbal medicine raw material corresponds to a feeding hole 201. The lower end of the herbal medicine barrel 31 is fixedly connected to the upper end of the installation support plate 12. A semi-circular feeding port 211 is provided at the upper end of the herbal medicine barrel 31. A semi-circular cover plate 32 for sealing the semi-circular feeding port 211 is hingedly connected to the upper end of the herbal medicine barrel 31. A handle block 321 is provided at the outer end of the semi-circular cover plate 32. A first magnet 3211 is fixed to the upper end of the handle block 321. A vertically distributed feeding riser 33 is installed on one side of the herbal medicine barrel 31 away from the semi-circular feeding port 211. The lower end of the feeding riser 33 is slightly higher than the inner bottom of the herbal medicine barrel 31. A feeding vertical shaft 331 is rotatably connected inside the feeding riser 33. The upper end of the feeding vertical shaft 331 slides out above the herbal medicine barrel 31. A second spiral blade 3311 is provided on the side wall of the feeding vertical shaft 331. A feeding pipe 34 is communicated and provided at the upper inner side of the herbal medicine barrel 31. One end of the feeding pipe 34 away from the herbal medicine barrel 31 is fixedly connected to the feeding hole 201. A raw material pushing port 3312 connected to the feeding pipe 34 is provided at one place of the side wall of the feeding riser 33.

[0041] As Figure 8 and Figure 9 shown, the movable connecting piece 4 includes a connecting circular plate 41. A connecting square column 42 is provided at the center of the upper end of the connecting circular plate 41. A lifting connecting column 43 is provided at the lower end of the connecting circular plate 41. A guiding square hole 431 is opened at the lower end of the lifting connecting column 43. A guiding square rod 44 is slidably connected inside the guiding square hole 431. A return spring 45 is fixed to the upper end of the guiding square rod 44. The upper end of the return spring 45 is fixedly connected to the upper end of the guiding square hole 431. A fixing block 46 is provided at the lower end of the guiding square rod 44. The lower end of the fixing block 46 is welded to the upper end of the feeding vertical shaft 331.

[0042] As Figure 10 andFigure 11 As shown in the figure, the feeding drive mechanism 5 includes a protective top plate 51 and a central gear 52 located directly below the protective top plate 51. A central shaft 521 vertically penetrates through the center of the central gear 52. The upper end of the central shaft 521 is rotatably connected to the lower end of the protective top plate 51. The lower end of the central shaft 521 is connected to a third motor 53. The protective top plate 51 has a circular structure. Support plates 511 are evenly distributed along the circumferential direction at the lower edge of the protective top plate 51. The lower end of the third motor 53 is connected to a fixed circular plate 55. Connecting cross plates 551 are evenly distributed along the circumferential direction on the outer periphery of the fixed circular plate 55. The outer ends of the connecting cross plates 551 are fixedly connected to the inner walls of the support plates 511. Feeding transmission gears 54 are evenly distributed on the outer periphery of the central gear 52. The feeding transmission gears 54 are meshed with the central gear 52. A transmission vertical shaft 541 vertically penetrates through the center of the feeding transmission gear 54. The upper end of the transmission vertical shaft 541 is rotatably connected to the protective top plate 51. The lower end of the transmission vertical shaft 541 slides out below the connecting cross plate 551. A connecting adjustment component 56 is installed on the support plate 511.

[0043] As Figure 12 shown in the figure, a connecting square hole 5411 that is slidably matched with the connecting square column 42 is opened at the lower end of the transmission vertical shaft 541. A vertically distributed lifting adjustment through slot 5111 is horizontally penetrated through the support plate 511. A positioning cross plate 5112 is vertically provided at the upper end outside the lifting adjustment through slot 5111. The connecting adjustment component 56 includes a horizontally distributed U-shaped adjustment plate 561. The open end of the U-shaped adjustment plate 561 slidably passes through the lifting adjustment through slot 5111 and extends into the inner side of the support plate 511. The upper end of the connecting circular plate 41 is slidably connected to the lower end of the U-shaped adjustment plate 561. A threaded adjustment rod 562 is vertically penetrated through the outer end of the U-shaped adjustment plate 561. The threaded adjustment rod 562 is threadedly connected to the U-shaped adjustment plate 561. The lower end of the threaded adjustment rod 562 is rotatably connected to the upper end of the herbal medicine barrel 31. The upper end of the threaded adjustment rod 562 slides through the positioning cross plate 5112 and is connected to a rotating block 563. A second magnet 5113 that attracts the first magnet 3211 is fixed to the outer end of the positioning cross plate 5112.

[0044] In the present invention, the stirring blades 2321 in the tank body 21 can rapidly stir and mix the Chinese herbal medicine raw materials to achieve the co-extraction of various Chinese herbal medicines. The first spiral blade 2322 can rapidly discharge the extracted Chinese herbal medicine residue, without the need for manual participation, that is, cleaning the residue for the next extraction, and can prevent the slag discharge riser from being blocked, ensuring smooth slag discharge. In the present invention, the feeding selection component 24 can select the Chinese herbal medicine raw materials to be put in. When a certain Chinese herbal medicine raw material needs to be put in, start the second motor 24 in the feeding selection component 24. The second motor 24 drives the driving gear 243 to rotate. The driving gear 243 drives the outer gear ring 242 to rotate. The outer gear ring 242 drives the selection ring 241 to rotate until the selection hole 2411 coincides with the feeding hole 201 corresponding to this kind of Chinese herbal medicine raw material. Then rotate the thread adjusting rod 562 above the herb barrel 31 corresponding to this kind of Chinese herbal medicine raw material to make the U-shaped adjusting plate 561 move upward. At this time, the connecting square column 42 in the movable connecting piece 4 pops up upward under the action of the return spring 45 and is connected to the driving vertical shaft 541. Then start the third motor 53 in the feeding driving mechanism 5 to drive the central gear 52 to rotate. The central gear 52 drives the feeding transmission gear 54 to rotate. The feeding transmission gear 54 drives the driving vertical shaft 541 to rotate. The driving vertical shaft 541 drives the feeding vertical shaft 331 and the second spiral blade 3311 in the feeding vertical pipe 33 to rotate through the movable connecting piece 4, so as to send the Chinese herbal medicine raw materials from the bottom of the herb barrel 31 through the feeding vertical pipe 33, the conveying pipe 34, the feeding hole 201, and the selection hole 2411 into the tank body 21, thus completing the feeding work of this kind of Chinese herbal medicine raw material. In the present invention, only one third motor 53 is used to drive the feeding of different kinds of Chinese herbal medicine raw materials, greatly reducing the number of motors used, not only saving the production cost, but also reducing the heat emission, being energy-saving and environment-friendly.

[0045] The above content is only an example and description of the structure of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar methods for substitution. As long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book, they should all belong to the protection scope of the present invention.

Claims

1. A Chinese herbal medicine supercritical extraction device, characterized in that: The invention comprises a support frame (1), a mixing and extracting mechanism (2) is installed in the middle of the upper end of the support frame (1), a material storage and feeding mechanism (3) is evenly distributed along the circumferential direction on the outer circumference of the mixing and extracting mechanism (2), a movable connecting member (4) is fixed on the upper end of the material storage and feeding mechanism (3), and a feeding driving mechanism (5) matched with the movable connecting member (4) is installed above the mixing and extracting mechanism (2); The support frame (1) comprises a mounting main board (11) of circular structure, a through hole (111) is vertically penetrated at the center of the mounting main board (11), mounting support plates (12) are evenly distributed along the circumferential direction on the outer circumference of the mounting main board (11), and a support column (13) is provided at the lower end of the mounting support plate (12); The mixed extraction mechanism (2) comprises a tank body (21), a tank cover (22) is installed at the upper end of the tank body (21), a mixing and stirring assembly (23) is installed at the center of the tank cover (22), feeding holes (201) are evenly distributed along the circumferential direction at the upper end of the side wall of the tank body (21), a slag discharge standpipe (212) is provided at the center of the lower end of the tank body (21), the lower end of the slag discharge standpipe (212) passes through the through hole (111) and is connected to a sealing cover (2121), fixing seats (211) are evenly distributed along the circumferential direction at the lower end of the side wall of the tank body (21), the lower end of the fixing seat (211) is fixedly connected to the upper end of the mounting main board (11), a retaining edge (213) is provided at the outer edge of the upper end of the tank body (21), and a feed selection assembly (24) is installed at the upper end of the inner wall of the tank body (21); The material storage and feeding mechanism (3) comprises a herbal medicine barrel (31), the lower end of the herbal medicine barrel (31) is fixedly connected to the upper end of the mounting support plate (12), the upper end of the herbal medicine barrel (31) is provided with a semicircular feeding port (211), the upper end of the herbal medicine barrel (31) is hingedly connected with a semicircular cover plate (32) for sealing the semicircular feeding port (211), a vertically distributed feeding standpipe (33) is installed on the side of the herbal medicine barrel (31) away from the semicircular feeding port (211), the lower end of the feeding standpipe (33) is higher than the bottom of the herbal medicine barrel (31), the upper end of the inner side of the herbal medicine barrel (31) is connected to a feeding pipe (34), the end of the feeding pipe (34) away from the herbal medicine barrel (31) is fixedly connected to the feeding hole (201), and a raw material pushing port (3312) connected to the feeding pipe (34) is provided at a side wall of the feeding standpipe (33); The movable connecting member (4) comprises a connecting circular plate (41), a connecting square column (42) is arranged at the center of the upper end of the connecting circular plate (41), a lifting connecting column (43) is arranged at the lower end of the connecting circular plate (41), a guiding square hole (431) is opened at the lower end of the lifting connecting column (43), a guiding square rod (44) is slidably connected in the guiding square hole (431), a return spring (45) is fixed at the upper end of the guiding square rod (44), the upper end of the return spring (45) is fixedly connected to the upper end of the guiding square hole (431), a fixing block (46) is arranged at the lower end of the guiding square rod (44), and the lower end of the fixing block (46) is welded to the upper end of the feed vertical shaft (331).

2. The Chinese herbal medicine supercritical extraction equipment according to claim 1, characterized in that: The mixing and stirring assembly (23) comprises a first motor (231) mounted on the upper end of the tank cover (22); the output end of the first motor (231) is connected to a stirring vertical shaft (232); the lower end of the stirring vertical shaft (232) passes through the tank cover (22) and extends into the interior of the slag discharge vertical pipe (212); a stirring blade (2321) is mounted on the side wall of the stirring vertical shaft (232) located inside the tank body (21); and a first spiral blade (2322) is mounted on the side wall of the stirring vertical shaft (232) located inside the slag discharge vertical pipe (212).

3. The Chinese herbal medicine supercritical extraction equipment according to claim 1, characterized in that: The feed selection component (24) comprises a selection ring (241), the outer wall of the selection ring (241) is slidably connected to the inner wall of the tank body (21), an outer gear ring (242) is arranged on the outer side of the upper end of the selection ring (241), the lower side of the outer gear ring (242) is slidably connected to the upper end of the tank body (21), a driving gear (243) is connected to one part of the outer gear ring (242), a rotating vertical shaft (2431) is connected to the center of the driving gear (243), the outer wall of the tank body (21) is connected to a fixed horizontal plate (244), the lower end of the rotating vertical shaft (2431) passes through the fixed horizontal plate (244) and is connected to a second motor (245), and a selection hole (2411) is horizontally penetrated at one part of the selection ring (241).

4. The Chinese herbal medicine supercritical extraction equipment according to claim 3, characterized in that: A notch (2131) is formed at one part of the retaining edge (213), and the driving gear (243) is located at the notch (2131).

5. The Chinese herbal medicine supercritical extraction equipment according to claim 3, characterized in that: The diameter of the selection hole (2411) is the same as the diameter of the feed hole (201), and the selection hole (2411) and the feed hole (201) are located on the same horizontal plane.

6. The Chinese herbal medicine supercritical extraction equipment according to claim 1, characterized in that: A feeding vertical shaft (331) is rotatably connected inside the feeding vertical pipe (33), and the upper end of the feeding vertical shaft (331) slides out to the top of the herbal medicine barrel (31), and a second spiral blade (3311) is provided on the side wall of the feeding vertical shaft (331).

7. The Chinese herbal medicine supercritical extraction equipment according to claim 1, characterized in that: The feed drive mechanism (5) comprises a protective top plate (51) and a central gear (52) located below the protective top plate (51); a central shaft (521) vertically penetrates and is connected to the center of the central gear (52); the upper end of the central shaft (521) is rotatably connected to the lower end of the protective top plate (51); the lower end of the central shaft (521) is connected to a third motor (53); the lower edge of the protective top plate (51) is evenly distributed with support plates (511) along the circumferential direction; the lower end of the third motor (53) is connected to a fixed circular plate (55); the fixed circular plate (55) Connecting transverse plates (551) are evenly distributed on the outer circumference in the circumferential direction, and the outer ends of the connecting transverse plates (551) are fixedly connected to the inner wall of the support plate (511). Feeding transmission gears (54) are evenly distributed on the outer circumference of the central gear (52), and a transmission vertical shaft (541) is vertically penetrated and connected at the center of the feeding transmission gear (54), and the upper end of the transmission vertical shaft (541) is rotatably connected to the protective top plate (51), and the lower end of the transmission vertical shaft (541) slides and extends below the connecting transverse plate (551), and a connecting adjustment component (56) is installed on the support plate (511).

8. The Chinese herbal medicine supercritical extraction equipment according to claim 7, characterized in that: A connecting square hole (5411) is provided at the lower end of the transmission vertical shaft (541) for slidingly cooperating with the connecting square column (42); a vertically distributed lifting adjustment through groove (5111) is horizontally penetrated on the support plate (511); and a positioning horizontal plate (5112) is vertically provided at the upper end of the outer side of the lifting adjustment through groove (5111).

9. The Chinese herbal medicine supercritical extraction equipment according to claim 8, characterized in that: The connection adjustment component (56) includes a horizontally distributed U-shaped adjustment plate (561), the open end of the U-shaped adjustment plate (561) slides through the lifting adjustment groove (5111) and extends into the inner side of the support plate (511), the upper end of the connecting circular plate (41) is slidably connected to the lower end of the U-shaped adjustment plate (561), the outer end of the U-shaped adjustment plate (561) is vertically penetrated by a threaded adjustment rod (562), the threaded adjustment rod (562) is threadedly connected to the U-shaped adjustment plate (561), the lower end of the threaded adjustment rod (562) is rotatably connected to the upper end of the herbal medicine barrel (31), and the upper end of the threaded adjustment rod (562) slides through the positioning horizontal plate (5112) and is connected to a rotating block (563).

10. The Chinese herbal medicine supercritical extraction equipment according to claim 8, characterized in that: A carrying block (321) is provided at the outer end of the semicircular cover plate (32), a first magnet (3211) is fixed to the upper end of the carrying block (321), and a second magnet (5113) that attracts the first magnet (3211) is fixed to the outer end of the positioning horizontal plate (5112).

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