Plant extract extraction device and method

Abstract

The invention belongs to the technical field of plant extraction, and discloses a plant extract extraction device and method.The plant extract extraction device comprises an extraction tank, a stirring assembly is fixedly installed at the top end of the extraction tank, and the stirring assembly comprises a speed reducer fixedly installed at the top end of the extraction tank; the output end of the speed reducer is connected with a stirring shaft through a flat key, a flow guide blade is fixedly installed at the top of the outer surface of the stirring shaft, and a drainage cover is fixedly installed at the position, located at the bottom end of the flow guide blade, of the outer side of the stirring shaft. According to the stirring device, liquid can be guided to flow, the liquid can be uniformly heated in the stirring process, local overheating is avoided, meanwhile, the inclined design of the flow guide blades enables the liquid to enter the drainage cover in an accelerated mode, the stirring efficiency is further improved, the extraction efficiency is improved, and the quality of an extracting solution and the integrity of active ingredients are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of plant extraction, and in particular relates to a device and method for extracting plant extract. Background Art

[0002] Plant extract is a solution extracted from plants by physical or chemical methods. It is used in various application fields, such as medicine, daily chemical industry and food industry. The extraction methods of plant extract mainly include the following:

[0003] Solvent extraction: This is one of the most commonly used methods. Appropriate solvents (such as ethanol, water, glycerol, etc.) are used to extract active ingredients from plant materials. The selection and concentration of the solvent, the material-liquid ratio, the extraction temperature and time will affect the extraction efficiency. For example, ethanol extraction is often used to make tinctures, while steam extraction is suitable for the extraction of water-soluble components.

[0004] Ultrasonic extraction method: The strong vibration and cavitation effect generated by ultrasound accelerates the release and dissolution of substances in plant cells. It has the advantages of high efficiency and energy saving. The ultrasonic extraction method can greatly shorten the extraction time and improve the extraction rate.

[0005] Supercritical fluid extraction: using supercritical carbon dioxide as a solvent for extraction, it can be carried out at low temperatures, retaining plant active ingredients, and is suitable for the extraction of heat-sensitive ingredients. This method has the advantages of no residue and environmental protection;

[0006] Steam distillation: suitable for extracting volatile plant components, such as essential oils. This method uses water vapor to remove volatile components and collects them after condensation. This method is suitable for stable and water-insoluble plant active ingredients, and is simple to operate and low-cost;

[0007] Microwave extraction: Use microwave heating to accelerate the extraction process and improve extraction efficiency. Microwave extraction can reach high temperatures in a short time, thereby accelerating the release of active ingredients.

[0008] Most of the current plant extract extraction devices use steam distillation to evaporate the solvent by heating to achieve the purpose of extraction. During the evaporation process, especially the long-term high-temperature heating process, the chemical composition of the plant extract changes, which will affect the quality and stability of the product. Summary of the invention

[0009] The present invention aims to solve the problem that the chemical composition of the plant extract changes during the long-term high-temperature heating process in the prior art, which affects the quality and stability of the product, and proposes the following technical solution:

[0010] A plant extract extraction device comprises: an extraction tank, a stirring assembly is fixedly installed on the top of the extraction tank, the stirring assembly comprises a reducer fixedly installed on the top of the extraction tank, the output end of the reducer is connected to a stirring shaft via a flat key, a guide vane is fixedly installed on the top of the outer surface of the stirring shaft, a drainage hood is fixedly installed on the outside of the stirring shaft at the bottom end of the guide vane, a flip rod is equidistantly and movably connected to the bottom end of the drainage hood, and a stirring blade is fixedly installed on the outside of the stirring shaft.

[0011] As a preferred embodiment of the above technical solution, the outside of the extraction tank is connected to a condenser through a pipeline, the outside of the extraction tank is connected to an oil-water separator through a pipeline, the bottom end of the oil-water separator is connected to a coolant storage tank, and the outside of the extraction tank is connected to a single-effect concentrator through a pipeline.

[0012] As a preferred embodiment of the above technical solution, a plurality of conical heads are fixedly installed at the bottom end of the drainage hood, and a vertically installed metal tube is integrally formed at the bottom end of the conical head. A corrugated hose with bending function is connected to the bottom end of the metal tube, and the bottom end of the corrugated hose is located inside the flip rod, and a blocking block is rotatably connected to the outside of the flip rod, and the blocking block is fixedly installed at the bottom end of the outer side of the stirring shaft.

[0013] As a preferred embodiment of the above technical solution, a lifting rod is vertically movably connected inside the stirring shaft, the bottom end of the lifting rod and the lifting ring are fixedly connected, a rotating ring is fixedly installed on the outside of the lifting rod, and the top end of the rotating ring is coaxially rotatably connected to a fixed ring.

[0014] As a preferred embodiment of the above technical solution, telescopic rods are equidistantly embedded and installed at the top of the fixing ring, a cylinder is embedded and installed at the top of the fixing ring between two telescopic rods, and the fixed end of the cylinder is fixedly installed at the top of the extraction tank.

[0015] As a preferred embodiment of the above technical solution, the lifting rod is L-shaped, and a fitting groove that fits the lifting rod is provided inside the stirring shaft.

[0016] As a preferred embodiment of the above technical solution, a concave block is welded to the top of the lifting rod, a deflection rod is rotatably connected inside the concave block, a deflection arm is movably connected to the outside of the deflection rod, a knocking block is fixedly installed at one end of the deflection arm, a rectangular rod is slidably connected inside the deflection arm, and a positioning strip is fixedly installed on the outside of the rectangular rod.

[0017] As a preferred embodiment of the above technical solution, one end of the positioning bar is welded to the outer side of the stirring shaft, and the number of the positioning bars is set to two.

[0018] As a preferred embodiment of the above technical solution, a limiting groove is provided inside the deflection arm, and the rectangular rod is slidably connected inside the limiting groove.

[0019] The present invention also discloses an extraction method of a plant extract extraction device, comprising the following steps:

[0020] Step 1: Pretreatment: Pretreatment of plant raw materials;

[0021] Step 2: Extraction: Place the plant material into an extraction tank, add a solvent, and extract by stirring the component and heating;

[0022] Step 3: Filtration: The mixed solution after extraction is filtered to separate the solvent from the solid waste to obtain the plant extract;

[0023] Step 4: Concentration: The plant extract obtained in step 3 is evaporated at normal pressure to remove the solvent in the extract to obtain a concentrated plant extract.

[0024] The beneficial effects of the present invention are:

[0025] (1) The device achieves efficient stirring of the extract through the design of the stirring assembly. The inclined design of the guide vane on the top of the stirring shaft can guide the flow of the liquid so that the liquid is evenly heated during the stirring process to avoid local overheating. At the same time, the inclined design of the guide vane accelerates the liquid to enter the drainage cover, further improving the stirring efficiency. Not only does it improve the extraction efficiency, but it also ensures the quality of the extract and the integrity of the active ingredients, thereby increasing the extraction effect of the plant extract;

[0026] (2) The rotation of the stirring shaft drives the lifting rod to rotate. The lifting rod can adjust the deflection angle of the flip rod through the cooperation of the lifting ring and the rotating ring. The angle of the flip rod can be further automatically adjusted by adjusting the speed of the reducer. When the speed of the stirring shaft is faster, the centrifugal force is greater and the deflection angle of the flip rod is greater. This automatic adjustment mechanism can optimize the stirring effect according to different extraction requirements and improve the extraction efficiency of the plant extract;

[0027] (3) It can effectively remove the residual materials on the outside of the stirring shaft. The up and down movement of the lifting rod drives the concave block to move. The concave block cooperates with the deflection rod and the deflection arm to make the knocking block knock against the stirring shaft, forming a shake, so that the residual materials on the outside of the stirring shaft fall off. This method is not only convenient for cleaning, but also reduces the maintenance cost of the equipment and increases the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The structure diagram of the extraction device in Example 1 is shown;

[0029] Figure 2 Shown is a schematic diagram of the structure of the stirring assembly in Example 1;

[0030] Figure 3The figure shows a schematic diagram of the installation structure of the flip rod in Example 1;

[0031] Figure 4 The figure shows a schematic diagram of the installation structure of the guide vane in Example 1;

[0032] Figure 5 The figure shows a schematic diagram of the installation structure of the lifting rod in Example 1;

[0033] Figure 6 It is shown that Figure 5 Schematic diagram of the structure of area A in the middle.

[0034] In the figure: 1. extraction tank; 2. condenser; 3. oil-water separator; 4. coolant storage tank; 5. single-effect concentrator; 6. stirring assembly; 61. reducer; 62. stirring shaft; 63. guide vane; 64. drainage cover; 65. conical head; 66. metal pipe; 67. corrugated hose; 68. flip rod; 69. barrier block; 610. stirring blade; 611. lifting ring; 612. lifting rod; 613. rotating ring; 614. fixing ring; 615. telescopic rod; 616. cylinder; 7. concave block; 8. deflection rod; 9. deflection arm; 10. knocking block; 11. rectangular rod; 12. positioning strip. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0036] Embodiment 1:

[0037] The present invention provides a plant extract extraction device, such as Figures 1 to 6 As shown, it includes: an extraction tank 1 for containing plant materials and solvents, a stirring assembly 6 is fixedly installed on the top of the extraction tank 1, and the stirring assembly 6 includes a reducer 61 fixedly installed on the top of the extraction tank 1, which is used to control the stirring speed and ensure the smooth progress of the stirring process. The output end of the reducer 61 is connected to the stirring shaft 62 through a flat key, which is responsible for transmitting power. A guide vane 63 is fixedly installed on the top of the outer surface of the stirring shaft 62, which is used to guide the flow of liquid and improve the stirring efficiency. A drainage hood 64 is fixedly installed on the outside of the stirring shaft 62 at the bottom end of the guide vane 63, which is used to concentrate the flow of liquid. The bottom end of the drainage hood 64 is equidistantly connected to a flip rod 68 for assisting liquid flow and stirring. The top and one end of the flip rod 68 are both provided with liquid outlet holes for discharging the liquid inside the flip rod 68. A stirring blade 610 is fixedly installed on the outside of the stirring shaft 62, which is used to directly stir the liquid and improve the extraction efficiency.

[0038] like Figure 1As shown, the outside of the extraction tank 1 is connected to a condenser 2 through a pipeline for condensing steam, the outside of the extraction tank 1 is connected to an oil-water separator 3 through a pipeline for separating oil and water, the bottom of the oil-water separator 3 is connected to a coolant storage tank 4 for storing coolant, and the outside of the extraction tank 1 is connected to a single-effect concentrator 5 through a pipeline for further concentrating the extract.

[0039] like Figure 2 , Figure 3 and Figure 4 As shown, a plurality of conical heads 65 are fixedly installed at the bottom end, and a vertically installed metal tube 66 is integrally formed at the bottom end of the conical head 65. A corrugated hose 67 with a bending function is connected to the bottom end of the metal tube 66. The bottom end of the corrugated hose 67 is located inside the flip rod 68. The edge of the flip rod 68 is set in a triangular shape, which is convenient for using the water flow during rotation to drive the flip rod 68 to deflect. A blocking block 69 is rotatably connected to the outer side of the flip rod 68. The blocking block 69 is used to block the liquid to prevent the problem of the liquid driving the corrugated hose 67 to deflect left and right when the stirring component 6 is running. At the same time, the corrugated hose 67 causes the flip rod 68 to deflect up and down. The blocking block 69 is fixedly installed at the bottom end of the outer side of the stirring shaft 62.

[0040] When the guide vane 63 rotates, the guide vane 63 is tilted to block the flow of the liquid and make the liquid flow downward along the tilted guide vane 63. At this time, the liquid is accelerated to enter the drainage hood 64. The liquid entering the drainage hood 64 squeezes the liquid retained in the drainage hood 64, so that the liquid retained in the drainage hood 64 flows under pressure along the conical head 65. The flowing liquid enters the corrugated hose 67 along the metal tube 66 and enters the flip rod 68. At this time, the flip rod 68 squeezes the liquid upward, so that the inside of the extraction tank 1 is stirred and the vortex is impacted.

[0041] like Figure 2 , Figure 3 and Figure 4 As shown, a lifting rod 612 is vertically movably connected inside the stirring shaft 62, the bottom end of the lifting rod 612 is fixedly connected to the lifting ring 611, a rotating ring 613 is fixedly installed on the outside of the lifting rod 612, the top of the rotating ring 613 is coaxially rotatably connected to a fixing ring 614, a telescopic rod 615 is equidistantly embedded and installed on the top of the fixing ring 614, a cylinder 616 is embedded and installed on the top of the fixing ring 614 between the two telescopic rods 615, and the fixed end of the cylinder 616 is fixedly installed on the top of the extraction tank 1;

[0042] The rotation of the stirring shaft 62 drives the lifting rod 612 to rotate. When the lifting rod 612 rotates, it drives the lifting ring 611 to rotate, and at the same time drives the rotating ring 613 to rotate, thereby changing the difficulty of rotating the rotating ring 613. At the same time, the cylinder 616 is running. When the cylinder 616 is running, it drives the fixed ring 614 to rise. When the fixed ring 614 rises, it drives the rotating ring 613 to rise and drives the telescopic rod 615 to be compressed. At this time, when the rotating ring 613 rises, it drives the lifting ring 611 to rise through the lifting rod 612. After the lifting ring 611 rises, it drives the flip rod 68 to deflect.

[0043] like Figure 3 and Figure 4 As shown, the lifting rod 612 is L-shaped, and a fitting groove that fits the lifting rod 612 is opened inside the stirring shaft 62. The fitting groove can easily limit the lifting rod 612 without hindering the lifting of the lifting rod 612.

[0044] like Figure 5 and Figure 6 As shown, a concave block 7 is welded to the top of the lifting rod 612, a deflection rod 8 is rotatably connected inside the concave block 7, a deflection arm 9 is movably connected to the outside of the deflection rod 8, a knocking block 10 is fixedly installed at one end of the deflection arm 9, a rectangular rod 11 is slidably connected inside the deflection arm 9, a positioning bar 12 is fixedly installed on the outside of the rectangular rod 11, one end of the positioning bar 12 is welded to the outside of the stirring shaft 62, and the number of the positioning bars 12 is set to two, which is convenient for fixing the positioning bars 12 and changes the difficulty of fixing the positioning bars 12. A limiting groove is provided inside the deflection arm 9, and the rectangular rod 11 is slidably connected to the inside of the limiting groove, which can facilitate the limiting of the rectangular rod 11 and changes the difficulty of limiting the rectangular rod 11.

[0045] When the lifting rod 612 is in operation, it drives the concave block 7 to move up and down, and when the concave block 7 moves up and down, it drives the deflection rod 8 to deflect. When the deflection rod 8 deflects, it drives the deflection arm 9 to move along the outside of the rectangular rod 11, thereby driving the knocking block 10 to move, so that the knocking block 10 knocks with the stirring shaft 62, and during the rapid lifting process, the stirring shaft 62 shakes, and the material remaining on the outside of the stirring shaft 62 falls off, thereby achieving the purpose of facilitating the cleaning of the stirring shaft 62.

[0046] The present invention also discloses an extraction method of a plant extract extraction device, comprising the following steps:

[0047] Step 1: Pretreatment: Pretreatment of plant raw materials, such as cleaning, drying and crushing, to improve extraction efficiency and quality;

[0048] Step 2: Extraction: Put the plant material into the extraction tank 1, add the solvent, and extract it by means of the stirring component 6 and heating. The reducer 61 of the stirring component 6 controls the stirring speed, and the guide blade 63 and the stirring blade 610 ensure that the liquid is evenly mixed to improve the extraction efficiency;

[0049] Step 3: Filtration: The mixed solution after extraction is filtered to separate the solvent from the solid waste to ensure the purity of the extract and obtain the plant extract;

[0050] Step 4: Concentration: The plant extract obtained in step 3 is evaporated at normal pressure to remove the solvent in the extract to obtain a concentrated plant extract.

[0051] Working principle: In actual use, after the raw materials and liquid are poured into the extraction tank 1, the reducer 61 is started. When the reducer 61 is running, it drives the stirring shaft 62 to rotate. When the stirring shaft 62 rotates, it drives the stirring blade 610 to stir the raw materials. This process allows the liquid and the raw materials to be fully mixed to prevent the problem of uneven temperature of the raw materials;

[0052] At the same time, the rotation of the stirring shaft 62 drives the guide vane 63 to rotate. The inclined design of the guide vane 63 blocks the flow of the liquid and makes the liquid flow downward along the inclined guide vane 63, which accelerates the liquid to enter the drainage cover 64. The liquid entering the drainage cover 64 squeezes the liquid retained in the drainage cover 64, so that the liquid retained in the drainage cover 64 flows under pressure along the conical head 65. The flowing liquid enters the corrugated hose 67 along the metal pipe 66 and then enters the flip rod 68. At this time, the flip rod 68 squeezes the liquid upward, so that the vortex generated by stirring inside the extraction tank 1 is impacted.

[0053] The rotation of the stirring shaft 62 also drives the lifting rod 612 to rotate. When the lifting rod 612 rotates, it drives the lifting ring 611 to rotate, and drives the rotating ring 613 to rotate, thereby changing the difficulty of rotating the rotating ring 613. At the same time, the cylinder 616 is running. When the cylinder 616 is running, it drives the fixed ring 614 to rise. When the fixed ring 614 rises, it drives the rotating ring 613 to rise, and drives the telescopic rod 615 to compress. At this time, when the rotating ring 613 rises, the lifting ring 611 is driven to rise through the lifting rod 612. After the lifting ring 611 rises, it drives the flip rod 68 to deflect, so that the deflection angle of the flip rod 68 is adjusted. At the same time, by adjusting the speed of the reducer 61, the angle of the flip rod 68 can be further adjusted. When the speed of the stirring shaft 62 is faster, the centrifugal force is greater. The greater the centrifugal force, the greater the deflection angle of the flip rod 68, so that the angle of the flip rod 68 is automatically adjusted, which can achieve efficient stirring of the extract, improve the extraction efficiency, and help reduce the scaling formed on the inner wall of the equipment during the heating process.

[0054] Finally, start the lifting rod 612. When the lifting rod 612 is in operation, it drives the concave block 7 to move up and down. When the concave block 7 moves up and down, it drives the deflection rod 8 to deflect. When the deflection rod 8 deflects, it drives the deflection arm 9 to move along the outside of the rectangular rod 11, thereby driving the knocking block 10 to move, so that the knocking block 10 knocks with the stirring shaft 62, and in the process of rapid lifting and lowering, the stirring shaft 62 shakes, and the material remaining on the outside of the stirring shaft 62 falls off, thereby achieving the purpose of facilitating the cleaning of the stirring shaft 62.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A plant extract extraction device, characterized in that: The plant extract extraction device comprises: an extraction tank (1), a stirring assembly (6) is fixedly mounted on the top of the extraction tank (1), the stirring assembly (6) comprises a reducer (61) fixedly mounted on the top of the extraction tank (1), the output end of the reducer (61) is connected to a stirring shaft (62) via a flat key, a guide vane (63) is fixedly mounted on the top of the outer surface of the stirring shaft (62), a drainage cover (64) is fixedly mounted on the outer side of the stirring shaft (62) at the bottom end of the guide vane (63), a flip rod (68) is equidistantly movably connected to the bottom end of the drainage cover (64), and a stirring blade (610) is fixedly mounted on the outer side of the stirring shaft (62).

2. A plant extract extraction device according to claim 1, characterized in that: The outside of the extraction tank (1) is connected to a condenser (2) via a pipeline, the outside of the extraction tank (1) is connected to an oil-water separator (3) via a pipeline, the bottom of the oil-water separator (3) is connected to a coolant storage tank (4), and the outside of the extraction tank (1) is connected to a single-effect concentrator (5) via a pipeline.

3. A plant extract extraction device according to claim 1, characterized in that: A plurality of conical heads (65) are fixedly mounted on the bottom end of the drainage cover (64); a vertically mounted metal tube (66) is integrally formed at the bottom end of the conical head (65); a corrugated hose (67) having a bending function is connected to the bottom end of the metal tube (66); the bottom end of the corrugated hose (67) is located inside the flip rod (68); a blocking block (69) is rotatably connected to the outside of the flip rod (68); and the blocking block (69) is fixedly mounted on the outside bottom end of the stirring shaft (62).

4. A plant extract extraction device according to claim 3, characterized in that: A lifting rod (612) is vertically movably connected inside the stirring shaft (62); the bottom end of the lifting rod (612) is fixedly connected to the lifting ring (611); a rotating ring (613) is fixedly installed on the outside of the lifting rod (612); and the top end of the rotating ring (613) is coaxially rotatably connected to a fixed ring (614).

5. A plant extract extraction device according to claim 4, characterized in that: Telescopic rods (615) are equidistantly embedded in the top of the fixing ring (614), and a cylinder (616) is embedded in the top of the fixing ring (614) between the two telescopic rods (615), and the fixed end of the cylinder (616) is fixedly mounted on the top of the extraction tank (1).

6. A plant extract extraction device according to claim 3, characterized in that: The lifting rod (612) is L-shaped, and a fitting groove for fitting the lifting rod (612) is provided inside the stirring shaft (62).

7. A plant extract extraction device according to claim 6, characterized in that: A concave block (7) is welded to the top of the lifting rod (612), a deflection rod (8) is rotatably connected inside the concave block (7), a deflection arm (9) is movably connected outside the deflection rod (8), a knocking block (10) is fixedly installed at one end of the deflection arm (9), a rectangular rod (11) is slidably connected inside the deflection arm (9), and a positioning strip (12) is fixedly installed outside the rectangular rod (11).

8. A plant extract extraction device according to claim 7, characterized in that: One end of the positioning strip (12) is welded to the outer side of the stirring shaft (62), and the number of the positioning strips (12) is two in total.

9. A plant extract extraction device according to claim 7, characterized in that: A limiting groove is provided inside the deflection arm (9), and the rectangular rod (11) is slidably connected inside the limiting groove.

10. An extraction method according to the plant extract extraction device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Pretreatment: Pretreatment of plant raw materials; Step 2: Extraction: Put the plant material into an extraction tank (1), add a solvent, and extract by stirring a component (6) and heating; Step 3: Filtration: The mixed solution after extraction is filtered to separate the solvent from the solid waste to obtain the plant extract; Step 4: Concentration: The plant extract obtained in step 3 is evaporated at normal pressure to remove the solvent in the extract to obtain a concentrated plant extract.

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