A Chinese herbal medicine supercritical extraction method and extraction equipment

Abstract

The present application discloses a method for supercritical extraction of Chinese herbal medicine and extraction equipment thereof, and relates to the field of supercritical extractors for Chinese herbal medicine, and includes a sealing component, a gas transmission component and a storage component; the sealing component includes an extraction tank, a sealing cover and a stirring rod; the extraction tank is a cylindrical shape with an opening at the upper end, the sealing cover is a cylindrical shape with an opening at the lower end, and the lower end opening of the sealing cover is threadedly arranged at the upper end of the extraction tank; the stirring rod is a cylindrical shape, and the stirring rod is rotatably connected to the top side of the inner opening of the sealing cover, and the stirring rod is located in the extraction tank; the stirring rod and the stirring rod can be made hollow inside and have an air outlet, and supercritical carbon dioxide can be injected into the stirring rod and the stirring rod and discharged from the air outlet, thereby improving the extraction effect on the Chinese herbal medicine and avoiding the accumulation of the Chinese herbal medicine at the bottom due to its own gravity, resulting in a reduction in the extraction effect on the Chinese herbal medicine.

Description

Technical Field

[0001] The invention relates to the field of Chinese herbal medicine supercritical extractors, and in particular to a Chinese herbal medicine supercritical extraction method and extraction equipment thereof. Background Art

[0002] Supercritical extraction is a separation and purification technology that uses supercritical fluid as an extraction solvent. It takes advantage of the fact that the solubility of supercritical fluid depends on the extraction pressure and temperature. Supercritical extraction uses the relationship between the solubility of supercritical fluid and its density to achieve the purpose of extraction by changing temperature and pressure. The solubility of solute in supercritical fluid is closely related to its density. The greater the density, the greater the solubility. Near the critical point, a slight increase in pressure or a drop in temperature will cause the density of the supercritical fluid to increase significantly, thereby increasing the solubility of the solute and facilitating the extraction of the solute. Conversely, a slight drop in pressure or a rise in temperature will reduce the density of the supercritical fluid, which is beneficial to the separation of the solute and the recovery of the solvent.

[0003] In the prior art, when extracting Chinese herbal medicines, the contact area between the extractant and the Chinese herbal medicines is not large, which is not conducive to the extraction effect and efficiency of the effective components inside the Chinese herbal medicines.

[0004] For example, a supercritical extractor of effective ingredients of Chinese herbal medicine provided by authorization announcement No. CN110280042B, when in use, the Chinese herbal medicine is first processed, and then the processed Chinese herbal medicine is installed in a storage net. After the Chinese herbal medicine is installed, the connecting block above the storage net is connected to the mounting block below the shell cover through threads, and a plurality of storage nets with Chinese herbal medicine installed are fixedly connected to the shell cover, and then the storage net below the shell cover with the storage net installed is aligned with the through hole provided on the limit plate in the shell body, and the storage net is inserted into the shell body, thereby limiting the position of the shell cover, and supercritical fluid is poured into the liquid inlet pipe at the top of the shell cover, thereby driving the turbine to rotate, thereby driving the rotating shaft to rotate, so that the mainspring rotates. The spring is wound around the clamping block and the rotating column to tighten the spring, and the rotating column rotates under the drive of the rotating shaft, so that the stirring blades on the rotating column stir the crushed Chinese medicine in the storage net. When the supercritical fluid stops flowing, the spring unloads the spring, thereby driving the rotating column to reverse, and the stirring blades on the rotating column stir the crushed Chinese medicine in the storage net; through the use of the stirring mechanism in conjunction with the storage mechanism, the supercritical liquid enters from the liquid inlet pipe, so that the stirring mechanism rotates, and the Chinese herbal medicine in the storage mechanism is stirred by the stirring mechanism, so that the supercritical liquid and the Chinese herbal medicine are stirred in the stirring mechanism, thereby increasing the contact area between the supercritical liquid and the Chinese herbal medicine, which is beneficial to the use of the extraction reaction, thereby facilitating the extraction of effective ingredients in the Chinese herbal medicine.

[0005] It has major drawbacks: Chinese herbal medicines are stored in the storage net, and due to their own gravity, they are piled up at the bottom. The supercritical fluid is injected from the liquid inlet at the top. A large amount of supercritical fluid has poor contact with the Chinese herbal medicines below and cannot enter the Chinese herbal medicines piled up below, resulting in poor extraction effect for the Chinese herbal medicines. At the same time, the device controls the rotation of the stirring mechanism through the delivery of supercritical fluid, and the stirring effect is poor. The injection of gas needs to be stopped intermittently, resulting in reduced extraction efficiency. Summary of the invention

[0006] The embodiment of the present application provides a supercritical extraction method for Chinese herbal medicine and an extraction device thereof, which solves the problem in the prior art that Chinese herbal medicines are stored in a storage net, and the Chinese herbal medicines are accumulated at the bottom due to their own gravity. The supercritical fluid is injected from the liquid inlet at the top. A large amount of supercritical fluid has a poor contact effect with the Chinese medicinal materials at the bottom and cannot enter the Chinese herbal medicines accumulated at the bottom, resulting in a poor extraction effect for the Chinese herbal medicines. At the same time, the device controls the rotation of the stirring mechanism through the delivery of the supercritical fluid, and the stirring effect is poor. The injected gas needs to be stopped intermittently, resulting in a decrease in the extraction efficiency. The stirring rod and the stirring bar are hollow inside and have an air outlet. Supercritical carbon dioxide can be injected into the stirring rod and the stirring bar and discharged from the air outlet, thereby improving the extraction effect for the Chinese herbal medicines and avoiding the accumulation of the Chinese herbal medicines at the bottom due to their own gravity, resulting in a decrease in the extraction effect for the Chinese herbal medicines.

[0007] The embodiment of the present application provides a Chinese herbal medicine supercritical extraction device, including a sealing component, a gas transmission component and a storage component;

[0008] The sealing assembly comprises an extraction tank, a sealing cover and a stirring rod;

[0009] The extraction tank is in the shape of a cylinder with an opening at the upper end, and the sealing cover is in the shape of a cylinder with an opening at the lower end, and the lower end opening of the sealing cover is threadedly arranged at the upper end of the extraction tank;

[0010] The stirring rod is cylindrical and is rotatably connected to the top side of the opening of the sealing cover. The stirring rod is located in the extraction tank.

[0011] The gas delivery component is used to deliver supercritical fluid, and the gas delivery component is arranged on the sealing cover and the stirring rod;

[0012] The storage component is used to store Chinese herbal medicines, and the storage component is arranged on the top side of the opening of the sealing cover, and the storage component is located in the extraction tank;

[0013] The sealing assembly also includes a stirring rod, an air outlet and an interception net;

[0014] There are a plurality of stirring rods, which are evenly spaced and distributed on the stirring rod. The stirring rod and the stirring rod are hollow inside, and the hollow cavities of the stirring rod and the stirring rod are connected.

[0015] The stirring rod and the stirring bar both have air outlets on their surfaces, and the air outlets on the surfaces of the stirring rod and the stirring bar are connected to the internal cavities of the two.

[0016] There are multiple air outlets, which are evenly spaced. The number of interception nets is consistent with the number of air outlets and corresponds one to one. The interception nets are fixed in the air outlets.

[0017] As an improvement, the axis of the stirring rod and the axis of the extraction tank are in the same straight line;

[0018] The mesh size of the interception net is smaller than the diameter of the Chinese herbal medicine.

[0019] As an improvement, the sealing assembly further includes a motor, an air outlet pipe and a sealing gasket;

[0020] The motor is fixed on the side of the sealing cover, and the output end of the motor is fixed on the stirring rod;

[0021] The air outlet pipe is fixed on one side of the extraction tank, and the air outlet pipe is connected to the extraction tank, and one end of the air outlet pipe away from the extraction tank is connected to the separation tank;

[0022] The sealing gasket is annular and made of rubber. The sealing gasket is fixed on the upper side of the extraction tank and is used to seal the gap between the extraction tank and the sealing cover.

[0023] The gas delivery assembly comprises a gas delivery sleeve, a groove, a connecting rod, a gas delivery pipe and an air inlet;

[0024] The gas delivery sleeve is a cylindrical body that is connected from top to bottom. The gas delivery sleeve sealing sleeve is arranged on the stirring rod. The inner ring of the gas delivery sleeve has a groove, which is annular and communicates with the hollow cavity inside the stirring rod.

[0025] The sealing cover is provided with an air inlet passage, and the air inlet passage connects the lower opening of the sealing cover with the upper side surface;

[0026] The lower end of the connecting rod is fixed to the upper side of the gas transmission sleeve, and the upper end of the connecting rod is fixed to the top side of the inner opening of the sealing cover;

[0027] The gas delivery pipe 1 is fixed in the air inlet, the lower end of the gas delivery pipe is fixed on the gas delivery sleeve, the gas delivery pipe 1 is connected to the groove, and the upper end of the gas delivery pipe 1 is connected to the gas source;

[0028] The storage assembly comprises an outer storage net, a fixing ring and a blocking net;

[0029] The fixing ring is in the shape of a cylinder that penetrates from top to bottom, and the fixing ring thread is arranged in the lower end opening of the sealing cover;

[0030] The outer storage net is cylindrical and penetrates from top to bottom, the blocking net 1 is semicircular, the blocking net 1 is fixed to the lower end of the outer storage net, and the upper end of the outer storage net is fixed to the lower side of the fixing ring;

[0031] The outer storage net and the blocking net are both mesh structures, and the mesh diameter of the outer storage net and the blocking net is smaller than the diameter of the Chinese herbal medicine;

[0032] The stirring rod and the stirring bar are both located in the cavity formed by the outer storage net and the blocking net.

[0033] As an improvement, the rotation axis of the motor and the axis of the extraction tank are on the same straight line;

[0034] The axis of the fixing ring and the axis of the extraction tank are in the same straight line;

[0035] The axes of the outer storage net and the first blocking net are on the same straight line, and the axes of the outer storage net and the extraction tank are on the same straight line.

[0036] As an improvement, the storage assembly further comprises an inner storage net, a second blocking net, an iron sheet and a fixing rope;

[0037] In the initial state, the inner storage net and the outer storage net have the same shape, and the blocking net 1 and the blocking net 2 have the same shape;

[0038] The second blocking net is fixed to the lower end of the inner storage net, and the upper end of the inner storage net is fixed to the lower side of the fixing ring;

[0039] The inner storage net and the blocking net are both made of nylon;

[0040] The inner storage net and the second plugging net are located in the cavity formed by the outer storage net and the first plugging net;

[0041] The stirring rod and the stirring bar are both located in the cavity formed by the inner storage net and the blocking net;

[0042] The inner storage net and the blocking net are both mesh structures, and the mesh diameters of the inner storage net and the blocking net are smaller than the diameter of the Chinese herbal medicine;

[0043] The iron sheets are fixed in the inner storage net, and the number of the iron sheets is consistent with the number of the stirring rods, and they correspond one to one, and the multiple iron sheets are evenly spaced and distributed;

[0044] The number of the fixing ropes is consistent with the number of the iron sheets, and they correspond one to one. One end of the fixing rope is fixed to the side of the iron sheet away from the axis of the inner storage net, and the other end of the fixing rope away from the iron sheet is arranged on the inner circle of the outer storage net.

[0045] A magnet is fixed at one end of the stirring rod away from the stirring rod.

[0046] As an improvement, the diameter of the inner storage net is consistent with the inner circle diameter of the outer storage net, the diameter of the blocking net 1 is consistent with the inner circle diameter of the blocking net 1, the outer circle of the inner storage net is closely attached to the inner circle of the outer storage net, and the outer circle of the blocking net 2 is closely attached to the inner circle of the blocking net 1;

[0047] The length of the fixing rope is one quarter of the inner diameter of the outer storage net;

[0048] When the stirring rod drives the stirring bar to rotate, the magnet at one end of the stirring bar attracts the iron sheet, causing the inner storage net to deform and move closer to the inside.

[0049] As an improvement, the storage assembly further includes a slider;

[0050] The number of the sliders is consistent with the number of the fixing ropes, and they correspond one to one;

[0051] One end of the fixing rope away from the iron sheet is fixed on the sliding block;

[0052] It also includes a slide rail; the number of the slide rails is consistent with the number of the sliders and corresponds one to one, the slide rails are inclined, the slide rails are arc-shaped and fit the inner wall of the outer storage net, and the slide rails are fixed to the inner wall of the outer storage net;

[0053] The length of the slide rail is consistent with the length of the fixed rope;

[0054] The slider is slidably arranged on the slide rail;

[0055] In the initial state, the slider is located at the lowermost end of the slide rail.

[0056] As an improvement, during the rotation of the stirring rod, the magnet at one end of the stirring rod intermittently attracts the iron sheet, causing the slider to slide on the slide rail, driving the inner storage net to intermittently spiral upward.

[0057] As an improvement, the storage assembly further includes a swing rope;

[0058] There are two swing ropes, which are symmetrically arranged;

[0059] The lower end of the swing rope is fixed inside the second blocking net to the lowest end, and the upper end of the swing rope is fixed to the inner wall of the inner storage net;

[0060] The stirring rod comprises a fixed rod and a toggle rod;

[0061] The fixed rod is fixed on the stirring rod, the toggle rod is tilted, one end of the toggle rod is fixed to the end of the fixed rod away from the stirring rod, and the end of the toggle rod away from the fixed rod is fixed with a magnet;

[0062] The fixed rod and the toggle rod are both hollow inside, and the hollow cavities of the fixed rod and the toggle rod are connected to the internal cavity of the stirring rod, and the fixed rod and the toggle rod are both provided with air outlets;

[0063] When the stirring rod drives the stirring bar to rotate, the rotation front of the lowest toggle rod can contact the swing rope.

[0064] A method for supercritical extraction of Chinese herbal medicine comprises the following steps:

[0065] S1: Screening the Chinese herbal medicines, removing moldy and deteriorated raw materials, pre-drying the Chinese herbal medicines to make the water content of the Chinese herbal medicines no more than 8%, and reducing the moisture in the raw materials; crushing the pre-dried Chinese herbal medicines into 20-40 mesh powders, and drying and cooling again;

[0066] S2: dismantle the fixing ring, put the processed Chinese herbal medicine into the cavity between the outer storage net and the blocking net, and reinstall the fixing ring so that the stirring rod and the stirring rod are located in the cavity between the outer storage net and the blocking net for storing the Chinese herbal medicine;

[0067] S3: The pressurized carbon dioxide is input from the gas transmission pipe 1, and the pressurized carbon dioxide gas is fully contacted with the Chinese medicinal plant powder in the extraction tank, and the essential oil or effective ingredients are dissolved under the supercritical state, and then discharged from the gas outlet pipe and enters the separation tank to separate the carbon dioxide and the effective ingredients of the Chinese herbal medicine. The separated carbon dioxide can be reused;

[0068] S4: During the extraction process, the motor drives the stirring rod to rotate continuously to improve the extraction effect. After the extraction is completed, the fixing ring is removed to clean the Chinese herbal medicine inside.

[0069] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0070] First, the stirring rod and the stirring bar are hollow inside and have an air outlet, so that supercritical carbon dioxide can be injected into the stirring rod and the stirring bar and discharged from the air outlet, thereby improving the extraction effect of Chinese herbal medicines and preventing the Chinese herbal medicines from accumulating at the bottom due to their own gravity, resulting in a reduction in the extraction effect of the Chinese herbal medicines;

[0071] Secondly, when the inner storage net is in the state of adsorbing the iron sheet by the magnet, it will be deformed, squeezing the stored Chinese herbal medicine inward, changing the arrangement order of the Chinese herbal medicine, and breaking it up. When the stirring rod rotates to a certain extent, it loses adsorption to the iron sheet, and the iron sheet is reset through the fixed rope to generate vibration, which enhances the stirring effect, helps to destroy the close combination between the Chinese herbal medicine particles, increases the contact area between the Chinese herbal medicine particles and the supercritical fluid, and improves the extraction efficiency; the deformation of the inner storage net can make the Chinese herbal medicine be continuously redistributed in the inner storage net, which helps the supercritical fluid to penetrate into various parts of the Chinese herbal medicine more evenly, and improves the uniformity of extraction;

[0072] Thirdly, the inner storage net can be spirally raised along the inclined direction of the slide rail to raise the height of the inner storage net. In the process of gradually moving upward, the effect of squeezing the Chinese herbal medicine stored inside is improved. At the same time, when the iron sheet on the inner storage net loses the adsorption of the magnet, it falls due to its own weight, which can generate vibration, disperse the Chinese herbal medicine located below, and make it redispersed, thereby improving the dispersion effect of the Chinese herbal medicine and improving the extraction effect thereof.

[0073] Fourthly, by adding a swing rope, the Chinese herbal medicines at the bottom can be constantly turned up and down. In this process, their arrangement is constantly changed, thereby improving the extraction effect. This can effectively prevent the Chinese herbal medicines at the bottom from receiving a large pressure due to gravity, which reduces the turning effect and worsens the extraction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] Figure 1 This is a front cross-sectional view of a Chinese herbal medicine supercritical extraction device of the present invention;

[0075] Figure 2 A Chinese herbal medicine supercritical extraction device according to the present invention Figure 1 A magnified view of the structure at inner A;

[0076] Figure 3 This is a front and cross-sectional view of a gas transmission component of a Chinese herbal medicine supercritical extraction device of the present invention;

[0077] Figure 4 A schematic diagram of the gas outlet of a Chinese herbal medicine supercritical extraction device of the present invention;

[0078] Figure 5 This is a schematic diagram of the installation of a slide rail of a Chinese herbal medicine supercritical extraction device according to the present invention;

[0079] Figure 6 This is a schematic diagram of the installation of a slider of a Chinese herbal medicine supercritical extraction device of the present invention;

[0080] Figure 7 This is a schematic diagram of the installation of a swing rope of a Chinese herbal medicine supercritical extraction device of the present invention;

[0081] Figure 8 This is a top view of the installation of a fixing rod and a toggle rod of a Chinese herbal medicine supercritical extraction device according to the present invention.

[0082] In the figure: 100, sealing assembly; 110, extraction tank; 120, sealing cover; 130, motor; 140, air outlet pipe; 150, sealing pad; 160, stirring rod; 170, stirring rod; 171, fixing rod; 172, toggle rod; 180, air outlet; 190, interception net;

[0083] 200, gas delivery assembly; 210, gas delivery sleeve; 211, groove; 220, connecting rod; 230, gas delivery pipe 1; 240, air inlet;

[0084] 300, storage assembly; 310, outer storage net; 320, inner storage net; 330, iron sheet; 340, fixing rope; 350, fixing ring; 360, swing rope; 370, slider; 380, blocking net 1; 390, blocking net 2;

[0085] 400. Slide rail. DETAILED DESCRIPTION

[0086] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0087] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0088] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0089] Embodiment 1: Figure 1-Figure 4 As shown, the present application is a Chinese herbal medicine supercritical extraction device, comprising a sealing component 100, a gas transmission component 200 and a storage component 300;

[0090] The sealing assembly 100 includes an extraction tank 110, a sealing cover 120 and a stirring rod 160;

[0091] The extraction tank 110 is in the shape of a cylinder with an opening at the upper end, and the sealing cover 120 is in the shape of a cylinder with an opening at the lower end. The lower end opening of the sealing cover 120 is threadedly disposed at the upper end of the extraction tank 110;

[0092] The stirring rod 160 is cylindrical, the axis of the stirring rod 160 is in the same straight line as the axis of the extraction tank 110, the stirring rod 160 is rotatably connected to the top side of the opening of the sealing cover 120, and the stirring rod 160 is located in the extraction tank 110;

[0093] The gas delivery component 200 is used to deliver supercritical fluid, and the gas delivery component 200 is disposed on the sealing cover 120 and the stirring rod 160;

[0094] The storage assembly 300 is used to store Chinese herbal medicines. The storage assembly 300 is arranged on the top side of the opening of the sealing cover 120, and the storage assembly 300 is located in the extraction tank 110;

[0095] The sealing assembly 100 further includes a stirring rod 170, an air outlet 180 and an interception net 190;

[0096] There are a plurality of stirring rods 170, which are evenly spaced and distributed on the stirring rod 160. The stirring rods 160 and 170 are hollow inside, and the hollow cavities of the stirring rods 160 and 170 are connected.

[0097] The stirring rod 160 and the stirring rod 170 both have air outlets 180 on their surfaces, and the air outlets 180 on the surfaces of the stirring rod 160 and the stirring rod 170 are connected to their internal cavities;

[0098] There are multiple air outlets 180, which are evenly spaced. The number of interception nets 190 is consistent with the number of air outlets 180, and they correspond one to one. The interception nets 190 are fixed in the air outlets 180;

[0099] The mesh size of the interception net 190 is smaller than the diameter of the Chinese herbal medicine;

[0100] The sealing assembly 100 further includes a motor 130, an air outlet pipe 140 and a sealing gasket 150;

[0101] The motor 130 is fixed to the upper side of the sealing cover 120, the output end of the motor 130 is fixed to the stirring rod 160, and the rotation axis of the motor 130 is on the same straight line as the axis of the extraction tank 110;

[0102] The air outlet pipe 140 is fixed to one side of the extraction tank 110, and the air outlet pipe 140 is connected to the extraction tank 110, and one end of the air outlet pipe 140 away from the extraction tank 110 is connected to the separation tank;

[0103] The separation tank is prior art and will not be described in detail here;

[0104] The sealing gasket 150 is annular and made of rubber. The sealing gasket 150 is fixed to the upper side of the extraction tank 110 and is used to seal the gap between the extraction tank 110 and the sealing cover 120.

[0105] The gas delivery assembly 200 includes a gas delivery sleeve 210, a groove 211, a connecting rod 220, a gas delivery pipe 230 and an air inlet 240;

[0106] The gas delivery sleeve 210 is a cylindrical body that is connected from top to bottom. The sealing sleeve of the gas delivery sleeve 210 is arranged on the stirring rod 160. The inner ring of the gas delivery sleeve 210 has a groove 211. The groove 211 is annular and communicates with the hollow cavity inside the stirring rod 160.

[0107] The sealing cover 120 has an air inlet 240 therein, and the air inlet 240 connects the lower opening and the upper side of the sealing cover 120;

[0108] The lower end of the connecting rod 220 is fixed to the upper side of the gas transmission sleeve 210, and the upper end of the connecting rod 220 is fixed to the top side of the opening of the sealing cover 120;

[0109] The gas delivery pipe 230 is fixed in the air inlet 240, the lower end of the gas delivery pipe 230 is fixed on the gas delivery sleeve 210, and the gas delivery pipe 230 is connected to the groove 211, and the upper end of the gas delivery pipe 230 is connected to the gas source;

[0110] The storage assembly 300 includes an outer storage net 310, a fixing ring 350 and a blocking net 380;

[0111] The fixing ring 350 is in the shape of a cylinder that penetrates from top to bottom. The axis of the fixing ring 350 is on the same straight line as the axis of the extraction tank 110. The fixing ring 350 is threadedly disposed in the lower end opening of the sealing cover 120.

[0112] The outer storage net 310 is cylindrical and penetrates from top to bottom, and the blocking net 1 380 is semicircular. The axes of the outer storage net 310 and the blocking net 1 380 are on the same straight line, and the axes of the outer storage net 310 and the extraction tank 110 are on the same straight line. The blocking net 1 380 is fixed to the lower end of the outer storage net 310, and the upper end of the outer storage net 310 is fixed to the lower side of the fixing ring 350.

[0113] The outer storage net 310 and the blocking net 380 are both mesh structures, and the mesh diameters of the outer storage net 310 and the blocking net 380 are smaller than the diameter of the Chinese herbal medicine;

[0114] The stirring rod 160 and the stirring bar 170 are both located in the cavity formed by the outer storage net 310 and the blocking net 1 380 .

[0115] A method for supercritical extraction of Chinese herbal medicine, using the above device, comprises the following steps:

[0116] S1: Screening the Chinese herbal medicines, removing moldy and deteriorated raw materials, pre-drying the Chinese herbal medicines to make the water content of the Chinese herbal medicines no more than 8%, and reducing the moisture in the raw materials; crushing the pre-dried Chinese herbal medicines into 20-40 mesh powders, and drying and cooling again;

[0117] S2: Remove the fixing ring 350, put the processed Chinese herbal medicine into the cavity of the outer storage net 310 and the blocking net 380, and reinstall the fixing ring 350 so that the stirring rod 160 and the stirring rod 170 are located in the cavity of the outer storage net 310 and the blocking net 380 for storing Chinese herbal medicine;

[0118] S3: The pressurized carbon dioxide is input from the gas transmission pipe 230, and the pressurized carbon dioxide gas fully contacts with the Chinese medicinal plant powder in the extraction tank 110, dissolves the essential oil or effective components under the supercritical state, and is discharged from the gas outlet pipe 140 and enters the separation tank to separate the carbon dioxide and the effective components of the Chinese herbal medicine. The separated carbon dioxide can be reused;

[0119] S4: During the extraction process, the motor 130 drives the stirring rod 170 to rotate continuously to improve the extraction effect. After the extraction is completed, the fixing ring 350 is removed to clean the Chinese herbal medicine inside.

[0120] Compared with the prior art, the stirring rod 160 and the stirring rod 170 are hollow inside and have an air outlet 180. Supercritical carbon dioxide can be injected into the stirring rod 160 and the stirring rod 170 and discharged from the air outlet 180, thereby improving the extraction effect of the Chinese herbal medicine and preventing the Chinese herbal medicine from accumulating at the bottom due to its own gravity, resulting in a decrease in the extraction effect of the Chinese herbal medicine.

[0121] Embodiment 2: When the embodiment 1 is used, the stirring rod 160 and the stirring rod 170 are used to stir the Chinese herbal medicine to be extracted, so that it can be in better contact with the supercritical fluid. However, when used, the stirring effect of the stirring rod 160 and the stirring rod 170 alone is poor. Based on this, the solution of the embodiment 1 is improved, such as Figure 1-Figure 2 As shown:

[0122] The storage assembly 300 further includes an inner storage net 320, a second blocking net 390, an iron sheet 330 and a fixing rope 340;

[0123] In the initial state, the inner storage net 320 and the outer storage net 310 have the same shape, and the blocking net 1 380 and the blocking net 2 390 have the same shape;

[0124] The second blocking net 390 is fixed to the lower end of the inner storage net 320, and the upper end of the inner storage net 320 is fixed to the lower side of the fixing ring 350;

[0125] The inner storage net 320 and the second blocking net 390 are both made of nylon;

[0126] The inner storage net 320 and the second blocking net 390 are located in the cavity formed by the outer storage net 310 and the first blocking net 380. The diameter of the inner storage net 320 is consistent with the inner circle diameter of the outer storage net 310. The diameter of the first blocking net 380 is consistent with the inner circle diameter of the first blocking net 380. The outer circle of the inner storage net 320 is in close contact with the inner circle of the outer storage net 310. The outer circle of the second blocking net 390 is in close contact with the inner circle of the first blocking net 380.

[0127] The stirring rod 160 and the stirring bar 170 are both located in the cavity formed by the inner storage net 320 and the second blocking net 390;

[0128] The inner storage net 320 and the second blocking net 390 are both mesh structures, and the mesh diameters of the inner storage net 320 and the second blocking net 390 are smaller than the diameter of the Chinese herbal medicine;

[0129] The iron sheets 330 are fixed in the inner storage net 320, and the number of the iron sheets 330 is consistent with the number of the stirring rods 170, and they correspond one to one, and the multiple iron sheets 330 are evenly spaced.

[0130] The number of the fixing ropes 340 is consistent with the number of the iron sheets 330, and they correspond one to one. One end of the fixing rope 340 is fixed to the side of the iron sheet 330 away from the axis of the inner storage net 320, and the other end of the fixing rope 340 away from the iron sheet 330 is arranged on the inner circle of the outer storage net 310.

[0131] The length of the fixing rope 340 is one quarter of the inner diameter of the outer storage net 310;

[0132] The stirring rod 170 is fixed with a magnet at one end away from the stirring rod 160;

[0133] When the stirring rod 160 drives the stirring bar 170 to rotate, the magnet at one end of the stirring bar 170 attracts the iron sheet 330, causing the inner storage net 320 to deform and move inward.

[0134] During the rotation of the stirring rod 160 and the stirring rod 170, the magnet at one end of the stirring rod 170 can intermittently adsorb the iron sheet 330, causing the inner storage net 320 to deform and move inward. When the stirring rod 160 and the stirring rod 170 continue to rotate, the deformed inner storage net 320 will be driven to deform to one side following the magnet at one end of the stirring rod 170. When the stirring rod 170 rotates, the magnet adsorbed to the iron sheet 330 moves farther and farther away, and the suction force on the iron sheet 330 gradually weakens, and the adsorption of the iron sheet 330 is lost, and the iron sheet 330 is reset by the fixing rope 340.

[0135] When the inner storage net 320 is in the state of being adsorbed by the iron sheet 330 by the magnet, it will be deformed, squeezing the stored Chinese herbal medicines inward, changing the arrangement order of the Chinese herbal medicines and breaking them up. When the stirring rod 170 rotates to a certain extent, it loses adsorption to the iron sheet 330, and the iron sheet 330 is reset through the fixing rope 340 to generate vibration, thereby enhancing the stirring effect, helping to break the tight bonding between the Chinese herbal medicine particles, increasing the contact area between the supercritical fluid and the extraction efficiency. The deformation of the inner storage net 320 can cause the Chinese herbal medicines to be continuously redistributed in the inner storage net 320, which helps the supercritical fluid to penetrate into various parts of the Chinese herbal medicines more evenly and improve the uniformity of the extraction.

[0136] Embodiment 3: When the embodiment 2 is in use, the magnet at one end of the stirring rod 170 adsorbs the iron sheet 330, causing the inner storage net 320 to deform and squeeze the Chinese herbal medicine. At the same time, when the iron sheet 330 loses the adsorption of the magnet and resets, the Chinese herbal medicine stored inside can vibrate. However, when in use, the dispersion effect of the Chinese herbal medicine can be further improved. Based on this, the solution of the embodiment 2 is improved, such as Figure 5-Figure 6 As shown:

[0137] The storage assembly 300 further includes a slider 370;

[0138] The number of the sliders 370 is consistent with the number of the fixing ropes 340 and corresponds one to one;

[0139] One end of the fixing rope 340 away from the iron sheet 330 is fixed on the slider 370;

[0140] It also includes a slide rail 400; the number of the slide rails 400 is consistent with the number of the sliders 370, and they correspond one to one. The slide rails 400 are arranged obliquely, and the slide rails 400 are arc-shaped and fit the inner wall of the outer storage net 310. The slide rails 400 are fixed to the inner wall of the outer storage net 310;

[0141] The length of the slide rail 400 is consistent with the length of the fixing rope 340;

[0142] The slider 370 is slidably disposed on the slide rail 400;

[0143] In the initial state, the slider 370 is located at the lowermost end of the slide rail 400;

[0144] During the rotation of the stirring rod 160 , the magnet at one end of the stirring rod 170 intermittently attracts the iron sheet 330 , causing the slider 370 to slide on the slide rail 400 , driving the inner storage net 320 to intermittently spirally rotate upward.

[0145] As the magnet attracts the iron sheet 330 and the iron sheet 330 moves with the magnet, the slider 370 slides in the slide rail 400 and gradually rises along the direction of the slide rail 400. In the process of gradually moving upward, the inner storage net 320 is driven to spirally rise and the height of the inner storage net 320 is raised. As the magnet rotates, it gradually loses its adsorption of the iron sheet 330, and the inner storage net 320 is reset by its own weight and the sliding of the slider 370 on the slide rail 400.

[0146] The inner storage net 320 can rise in a spiral direction along the inclined direction of the slide rail 400 to raise the height of the inner storage net 320. In the process of gradually moving upward, the effect of squeezing the Chinese herbal medicines stored inside is improved. At the same time, when the iron sheet 330 on the inner storage net 320 loses the adsorption of the magnet, it falls due to its own weight and can generate vibrations, which can disperse the Chinese herbal medicines located below and redisperse them, thereby improving the dispersion effect of the Chinese herbal medicines and improving the extraction effect thereof.

[0147] Embodiment 4: When the embodiment 3 is in use, the inner storage net 320 can be made to rotate upward in the direction of the slide rail 400, so as to generate vibration when it falls. However, when the device is in use, the stirring effect of the Chinese herbal medicine at the lowest end of the inner storage net 320 is poor and cannot be completely stirred. Based on this, the solution of the embodiment 3 is improved, such as Figure 7-Figure 8 As shown:

[0148] The storage assembly 300 further includes a swing rope 360;

[0149] There are two swing ropes 360, which are symmetrically arranged;

[0150] The lower end of the swing rope 360 ​​is fixed to the lowest end in the second blocking net 390, and the upper end of the swing rope 360 ​​is fixed to the inner wall of the inner storage net 320;

[0151] The stirring rod 170 includes a fixed rod 171 and a toggle rod 172;

[0152] The fixing rod 171 is fixed on the stirring rod 160, the toggle rod 172 is tilted, one end of the toggle rod 172 is fixed to the end of the fixing rod 171 away from the stirring rod 160, and the end of the toggle rod 172 away from the fixing rod 171 is fixed with a magnet;

[0153] The fixing rod 171 and the toggle rod 172 are both hollow inside, and the hollow cavities of the fixing rod 171 and the toggle rod 172 are connected to the internal cavity of the stirring rod 160, and the fixing rod 171 and the toggle rod 172 are provided with an air outlet 180;

[0154] When the stirring rod 160 drives the stirring bar 170 to rotate, the front of the lowest toggle rod 172 can contact the swing rope 360 ​​.

[0155] During the rotation of the stirring rod 160 and the stirring bar 170, Figure 8 As shown, by rotating counterclockwise, the toggle rod 172 will continuously contact the swing rope 360, contacting the swing rope 360 ​​to move forward a distance. After contacting the swing rope 360 ​​to move forward a distance, the swing rope 360 ​​will slide down from one side of the toggle rod 172. In the process of the swing rope 360 ​​being contacted and reset, the inner storage net 320 can vibrate, causing the Chinese herbal medicines on the bottom side to turn up.

[0156] By adding a 360-degree swing rope, the Chinese herbal medicines at the bottom can be constantly turned up and down. In this process, their arrangement is constantly changed, thereby improving the extraction effect. This can effectively prevent the Chinese herbal medicines at the bottom from receiving greater pressure due to gravity, which reduces the turning effect and worsens the extraction effect.

[0157] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A Chinese herbal medicine supercritical extraction device, comprising a sealing component (100), a gas transmission component (200) and a storage component (300); The sealing assembly (100) comprises an extraction tank (110), a sealing cover (120) and a stirring rod (160); The extraction tank (110) is in the shape of a cylinder with an opening at the upper end, and the sealing cover (120) is in the shape of a cylinder with an opening at the lower end, and the lower end opening of the sealing cover (120) is threadedly arranged at the upper end of the extraction tank (110); The stirring rod (160) is cylindrical in shape, and the stirring rod (160) is rotatably connected to the top side of the opening of the sealing cover (120), and the stirring rod (160) is located in the extraction tank (110); The gas delivery component (200) is used to deliver supercritical fluid, and the gas delivery component (200) is arranged on the sealing cover (120) and the stirring rod (160); The storage component (300) is used to store Chinese herbal medicines, and the storage component (300) is arranged on the top side of the opening of the sealing cover (120), and the storage component (300) is located in the extraction tank (110); It is characterized in that The sealing assembly (100) further comprises a stirring rod (170), an air outlet (180) and an intercepting net (190); There are a plurality of stirring rods (170) which are evenly spaced and distributed on the stirring rod (160); the stirring rod (160) and the stirring rod (170) are hollow inside, and the hollow cavities of the stirring rod (160) and the stirring rod (170) are in communication; The stirring rod (160) and the stirring bar (170) both have air outlets (180) on their surfaces, and the air outlets (180) on the surfaces of the stirring rod (160) and the stirring bar (170) are both connected to the internal cavities of the two. There are a plurality of air outlets (180) which are evenly spaced and distributed; the number of the interception nets (190) is consistent with the number of the air outlets (180) and corresponds one to one; and the interception nets (190) are fixed inside the air outlets (180); The storage assembly (300) further comprises an inner storage net (320), a second blocking net (390), an iron sheet (330) and a fixing rope (340); In the initial state, the inner storage net (320) and the outer storage net (310) have the same shape, and the first blocking net (380) and the second blocking net (390) have the same shape; The second blocking net (390) is fixed to the lower end of the inner storage net (320), and the upper end of the inner storage net (320) is fixed to the lower side of the fixing ring (350); The inner storage net (320) and the second blocking net (390) are both made of nylon; The inner storage net (320) and the second blocking net (390) are located in a cavity formed by the outer storage net (310) and the first blocking net (380); The stirring rod (160) and the stirring bar (170) are both located in a cavity formed by the inner storage net (320) and the second blocking net (390); The inner storage net (320) and the second blocking net (390) are both mesh structures, and the mesh diameters of the inner storage net (320) and the second blocking net (390) are smaller than the diameter of the Chinese herbal medicine; The iron sheets (330) are fixed in the inner storage net (320), and the number of the iron sheets (330) is consistent with the number of the stirring rods (170), and they correspond one to one, and the plurality of iron sheets (330) are evenly spaced and distributed; The number of the fixing ropes (340) is consistent with the number of the iron sheets (330) and corresponds one to one. One end of the fixing rope (340) is fixed to a side of the iron sheet (330) away from the axis of the inner storage net (320), and the end of the fixing rope (340) away from the iron sheet (330) is arranged on the inner circle of the outer storage net (310); A magnet is fixed to one end of the stirring rod (170) away from the stirring rod (160); The diameter of the inner storage net (320) is consistent with the inner circle diameter of the outer storage net (310), the diameter of the first blocking net (380) is consistent with the inner circle diameter of the first blocking net (380), the outer circle of the inner storage net (320) is closely attached to the inner circle of the outer storage net (310), and the outer circle of the second blocking net (390) is closely attached to the inner circle of the first blocking net (380); The length of the fixing rope (340) is one quarter of the inner circle diameter of the outer storage net (310); When the stirring rod (160) drives the stirring bar (170) to rotate, the magnet at one end of the stirring bar (170) attracts the iron sheet (330), causing the inner storage net (320) to deform and move inward.

2. A Chinese herbal medicine supercritical extraction device as claimed in claim 1, characterized in that: The axis of the stirring rod (160) and the axis of the extraction tank (110) are on the same straight line; The mesh size of the interception net (190) is smaller than the diameter of the Chinese herbal medicine.

3. The Chinese herbal medicine supercritical extraction equipment according to claim 1, characterized in that: The sealing assembly (100) further comprises a motor (130), an air outlet pipe (140) and a sealing gasket (150); The motor (130) is fixed to the upper side of the sealing cover (120), and the output end of the motor (130) is fixed to the stirring rod (160); The air outlet pipe (140) is fixed to one side of the extraction tank (110), and the air outlet pipe (140) is in communication with the extraction tank (110); an end of the air outlet pipe (140) away from the extraction tank (110) is in communication with the separation tank; The sealing gasket (150) is annular and made of rubber. The sealing gasket (150) is fixed to the upper side of the extraction tank (110). The sealing gasket (150) is used to seal the gap between the extraction tank (110) and the sealing cover (120); The gas delivery assembly (200) comprises a gas delivery sleeve (210), a groove (211), a connecting rod (220), a gas delivery pipe 1 (230) and an air inlet (240); The gas transmission sleeve (210) is in the shape of a cylinder that is connected from top to bottom. The sealing sleeve of the gas transmission sleeve (210) is arranged on the stirring rod (160). The inner ring of the gas transmission sleeve (210) is provided with a groove (211). The groove (211) is annular and communicates with the hollow cavity inside the stirring rod (160). The sealing cover (120) has an air inlet (240) therein, and the air inlet (240) communicates with the lower opening and the upper side surface of the sealing cover (120); The lower end of the connecting rod (220) is fixed to the upper side of the gas transmission sleeve (210), and the upper end of the connecting rod (220) is fixed to the top side of the inner opening of the sealing cover (120); The gas delivery pipe 1 (230) is fixed in the air inlet (240), the lower end of the gas delivery pipe 1 (230) is fixed on the gas delivery sleeve (210), the gas delivery pipe 1 (230) is connected to the groove (211), and the upper end of the gas delivery pipe 1 (230) is connected to the gas source; The storage assembly (300) comprises an outer storage net (310), a fixing ring (350) and a blocking net 1 (380); The fixing ring (350) is in the shape of a cylinder that penetrates from top to bottom, and the fixing ring (350) is threadedly arranged in the lower end opening of the sealing cover (120); The outer storage net (310) is cylindrical and penetrates from top to bottom, the blocking net 1 (380) is semicircular, the blocking net 1 (380) is fixed to the lower end of the outer storage net (310), and the upper end of the outer storage net (310) is fixed to the lower side of the fixing ring (350); The outer storage net (310) and the first blocking net (380) are both mesh structures, and the mesh diameters of the outer storage net (310) and the first blocking net (380) are smaller than the diameter of the Chinese herbal medicine; The stirring rod (160) and the stirring bar (170) are both located in a cavity formed by the outer storage net (310) and the first blocking net (380).

4. A Chinese herbal medicine supercritical extraction device as claimed in claim 3, characterized in that: The rotation axis of the motor (130) and the axis of the extraction tank (110) are on the same straight line; The axis of the fixing ring (350) and the axis of the extraction tank (110) are on the same straight line; The axes of the outer storage net (310) and the first blocking net (380) are on the same straight line, and the axes of the outer storage net (310) and the extraction tank (110) are on the same straight line.

5. The Chinese herbal medicine supercritical extraction equipment according to claim 1, characterized in that: The storage assembly (300) further includes a slider (370); The number of the sliding blocks (370) is consistent with the number of the fixing ropes (340), and they correspond one to one; One end of the fixing rope (340) away from the iron sheet (330) is fixed on the sliding block (370); It also includes a slide rail (400); the number of the slide rails (400) is consistent with the number of the sliders (370), and they correspond one to one; the slide rails (400) are arranged obliquely; the slide rails (400) are in an arc shape that fits the inner wall of the outer storage net (310); and the slide rails (400) are fixed to the inner wall of the outer storage net (310); The length of the slide rail (400) is consistent with the length of the fixing rope (340); The sliding block (370) is slidably disposed on the sliding rail (400); In an initial state, the sliding block (370) is located at the lowermost end of the sliding rail (400).

6. The Chinese herbal medicine supercritical extraction equipment according to claim 5, characterized in that: During the rotation of the stirring rod (160), the magnet at one end of the stirring rod (170) intermittently attracts the iron sheet (330), causing the slider (370) to slide on the slide rail (400), thereby driving the inner storage net (320) to intermittently rotate spirally upward.

7. The Chinese herbal medicine supercritical extraction equipment according to claim 5, characterized in that: The storage assembly (300) further includes a swing rope (360); There are two swing ropes (360) which are symmetrically arranged; The lower end of the swing rope (360) is fixed inside the second blocking net (390) to the lowest end, and the upper end of the swing rope (360) is fixed to the inner wall of the inner storage net (320); The stirring rod (170) comprises a fixed rod (171) and a toggle rod (172); The fixed rod (171) is fixed on the stirring rod (160), the toggle rod (172) is arranged obliquely, one end of the toggle rod (172) is fixed to an end of the fixed rod (171) away from the stirring rod (160), and a magnet is fixed to an end of the toggle rod (172) away from the fixed rod (171); The fixed rod (171) and the toggle rod (172) are both hollow inside, and the hollow cavities of the fixed rod (171) and the toggle rod (172) are connected to the internal cavity of the stirring rod (160), and the fixed rod (171) and the toggle rod (172) are both provided with an air outlet (180); When the stirring rod (160) drives the stirring bar (170) to rotate, the front of the lowest toggle rod (172) can contact the swing rope (360).

8. A method for supercritical extraction of Chinese herbal medicine, characterized in that: The Chinese herbal medicine supercritical extraction equipment according to any one of claims 1 to 7 comprises the following steps: S1: Screening the Chinese herbal medicines, removing moldy and deteriorated raw materials, pre-drying the Chinese herbal medicines to make the water content of the Chinese herbal medicines no more than 8%, and reducing the moisture in the raw materials; crushing the pre-dried Chinese herbal medicines into 20-40 mesh powders, and drying and cooling again; S2: dismantle the fixing ring (350), place the processed Chinese herbal medicine into the cavity between the outer storage net (310) and the first blocking net (380), and reinstall the fixing ring (350) so that the stirring rod (160) and the stirring rod (170) are located in the cavity between the outer storage net (310) and the first blocking net (380) for storing the Chinese herbal medicine; S3: The pressurized carbon dioxide is input from the gas transmission pipe 1 (230), and the pressurized carbon dioxide gas is fully contacted with the Chinese medicinal plant powder in the extraction tank (110), and the essential oil or effective components are dissolved under a supercritical state, and then discharged from the gas outlet pipe (140) and enters the separation tank to separate the carbon dioxide and the effective components of the Chinese herbal medicine. The separated carbon dioxide can be reused; S4: During the extraction process, the motor (130) drives the stirring rod (170) to rotate continuously to improve the extraction effect. After the extraction is completed, the fixing ring (350) is removed to clean the Chinese herbal medicine inside.

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