Preparation technology and method of centella asiatica extract with whitening and acne removing effects

Abstract

The herba centellae extract comprises a tank body, placing frames are installed on the two sides of the tank body, a mounting plate is installed in the middle of the inner wall of the tank body, an elastic telescopic rod is installed on the surface of the mounting plate, and a smashing bin is installed at the top end of the elastic telescopic rod; and a funnel bin is mounted on the inner side of the mounting plate. Through the arrangement of the rotating table, the cutting knife and the synchronous extension assembly, the cutting knife can be synchronously adjusted according to the weight of materials in the crushing bin, so that the materials at different heights in the crushing bin can be uniformly crushed, and the cutting knife can be synchronously adjusted according to the materials at different heights; materials on each layer can be fully smashed, and the uniformity of the materials in the smashing process can be guaranteed through the synchronously-adjusted cutting knives. And the same crushing effect can be obtained for materials at high positions and materials at low positions, so that the problem of non-uniform crushing is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of Centella asiatica extraction, and specifically to a preparation technology and method of a Centella asiatica extract having both whitening and acne-removing effects. Background Art

[0002] Centella asiatica, also known as mint, centella asiatica, pennywort, and horseshoe grass, is a plant of the genus Centella of the Apiaceae family. The main active ingredients of Centella asiatica are asiatica glycoside, hydroxymadecassoside, asiatic acid and hydroxymadecassoside. Centella asiatica has antioxidant function, can remove the aging stratum corneum, accelerate skin metabolism, and can also tighten the connection between the epidermis and dermis, promote the formation of collagen in the dermis of the skin, help reduce skin tension lines, and make the skin firm and smooth. In addition, asiatica glycoside has a good polymerization effect with phospholipid substances, and has a more obvious effect on eliminating acne. In order to efficiently and purely extract the effective ingredients in Centella asiatica, specific extraction equipment and technology are particularly important.

[0003] When crushing Centella asiatica, fresh or dried Centella asiatica is usually needed (fresh Centella asiatica is pre-treated, dehydrated or removed by other methods). When crushing a large amount of Centella asiatica, the crusher may need to run at a higher load due to the large amount of material. The crusher under high load may not be convenient to crush the Centella asiatica into a particle size suitable for extraction. Centella asiatica with too large or too small particles may affect the solvent penetration and solute dissolution during the extraction process, thereby reducing the extraction efficiency. In addition, the crushed Centella asiatica is more likely to form lumps or adhesions due to the residual moisture inside it. When the lumps and adhesions of Centella asiatica come into contact with the solvent, they will hinder the penetration of the solvent, making it difficult for the solvent to evenly and effectively contact the Centella asiatica, thereby affecting the extraction effect. In view of the above problems, it is urgent to carry out innovative design based on the original basis. Summary of the invention

[0004] The purpose of the present invention is to provide a technology and method for preparing a Centella asiatica extract having both whitening and acne-removing effects, so as to solve the above-mentioned background technology that a grinder under high load may not be convenient to grind the Centella asiatica into a particle size suitable for extraction, and the crushed Centella asiatica is more likely to form lumps or adhesions due to the residual moisture inside it. The technical solution of the present invention is aimed at the technical problem that the existing technical solution is too single, and provides a solution that is significantly different from the existing technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: In the first aspect, the present invention provides a preparation technology of Centella asiatica extract with both whitening and acne-removing effects, including a tank body, a placing rack is installed on both sides of the tank body, a mounting plate is installed in the middle of the inner wall of the tank body, an elastic telescopic rod is installed on the surface of the mounting plate, a crushing bin is installed on the top of the elastic telescopic rod, a funnel bin is installed on the inner side of the mounting plate, a mounting rack is installed on the inner wall of the lower end of the tank body, a centrifugal cylinder is rotatably connected inside the mounting rack, the top of the centrifugal cylinder is rotatably connected to the bottom of the funnel bin, a sleeve rod is rotatably connected to the top of the inner wall of the tank body, a connecting sleeve is sleeved on the surface of the sleeve rod, the top of the sleeve rod is connected to the output end of a motor, a rotating table is provided at the bottom of the connecting sleeve, three groups of cutting knives are installed inside the rotating table, a closing plate is rotatably connected to the bottom of the crushing bin, a first electric push rod is installed at the bottom of the crushing bin, the protruding end of the first electric push rod is connected to the closing plate, a pressure sensor is installed on the surface of the mounting plate, a connecting rod is installed at the bottom of the pressure sensor, and the bottom of the connecting rod is connected to the inner wall of the centrifugal barrel; A synchronous extension component, which is arranged at the bottom of the crushing bin and inside the rotating table, and can synchronously adjust the cutting knife according to the amount of material inside the crushing bin, so that the cutting knife can evenly crush the material inside the crushing bin; A synchronous swing component, which is arranged at the upper end of the inner wall of the tank body and inside the connecting tube, and can drive the cutting knife to swing up and down when cutting, and the swing amplitude of the cutting knife is larger when there is more material in the crushing bin, and smaller when there is less material; The agglomeration breaking component is arranged inside the connecting rod, and the agglomeration breaking component can break up and break the agglomerations generated when the materials are crushed.

[0006] Preferably, the blade surfaces of the three groups of cutting knives are all inclined downward, and the three groups of cutting knives are distributed in a circular shape on the surface of the rotating table.

[0007] Preferably, the synchronous extension component includes a first oil tank installed at the bottom of the mounting plate, a first piston rod sliding inside the first oil tank, the top of the first piston rod is connected to the bottom of the crushing bin, a second oil tank is installed at the bottom of the internal cavity of the rotating table, a second piston rod is slidably connected inside the second oil tank, a circular plate is installed in the center of the middle and upper cutting knives, the second piston rod is connected to the bottom of the circular plate of the middle cutting knife, a third oil tank is installed inside the circular plate of the middle cutting knife, a third piston rod is slidably connected inside the third oil tank, the third piston rod is connected to the bottom of the circular plate of the upper cutting knife, a two-way oil pipe is installed at the top of the rotating table, a fourth piston rod slides inside the two-way oil pipe, a protrusion is connected to the top of the fourth piston rod, and the protrusion slides within the limit at the bottom of the connecting cylinder.

[0008] Preferably, the synchronous swing assembly includes an extrusion ring installed on the inner wall of the top end of the tank body, and also includes a first oil chamber opened inside the connecting cylinder, a fifth piston rod and a sixth piston rod slide inside the first oil chamber, an extrusion rod is installed on the end of the fifth piston rod, and the bottom of the sixth piston rod is connected to the top protrusion of the fourth piston rod.

[0009] Preferably, a conical notch is provided on the inner wall of the extrusion ring, with a larger opening at the upper end and a smaller opening at the lower end; the conical notch is distributed in a circular shape on the inner wall surface of the extrusion ring.

[0010] Preferably, the first oil chamber is in an "L" shape, and the end of the extrusion rod is provided with a rounded corner.

[0011] Preferably, the agglomeration crushing assembly includes two groups of crushing rods installed inside the connecting rod, the crushing rod at the lower end is installed on the surface of the connecting rod, the crushing rod at the upper end slides within the connecting rod, a second oil chamber is opened in the middle of the upper crushing rod, a second electric push rod is installed at the bottom of the internal cavity of the connecting rod, the extended end of the second electric push rod is connected to the bottom end of the middle of the crushing rod at the upper end, a seventh piston rod and an eighth piston rod slide inside the second oil chamber, and an extension rod is installed at the end of the eighth piston rod.

[0012] Preferably, the second oil chamber is in a "T" shape; the eighth piston rod and the extension rod are provided in two groups, and they slide within the cavities at both ends of the upper breaking rod.

[0013] In a second aspect, the present invention provides a method for preparing a Centella asiatica extract having both whitening and acne-removing effects, the extraction method comprising the following steps: S1: Select high-quality Centella asiatica as raw material, ensure that it is free of impurities and mildew, crush the Centella asiatica raw material into 0.5-1 mm fine particles and powder, and transport the crushed Centella asiatica powder into the extraction device; S2: using an ultrasonic extractor, fully contact the raw material with a 70% ethanol solution, maintain the ratio of the added volume of the ethanol solution to the weight of the Centella asiatica powder at 2:1, raise and maintain the temperature at 50-60°C, mix the ethanol solution and the Centella asiatica powder for 2-4 hours for extraction; S3: After the ethanol solution and the Centella asiatica powder are evenly mixed, the mixed Centella asiatica and the solvent are placed in a centrifuge for centrifugal extraction at a speed of 5000-6500 r / min for an extraction time of 0.5-1 hour to extract the active ingredients in the Centella asiatica into the solvent; S4: Use a bag filter to remove 98% of the impurities and solid residues in the extract to obtain a clear extract. The temperature is set to 40-50°C and the pressure is set to 0.05-0.1MPa. The extract is concentrated to 10-20% by a vacuum concentrator. S5: Put the concentrated liquid into a vacuum microwave dryer, set the temperature to 40-60°C, dry for 2-4 hours to dry the concentrated extract into powder, and collect the dried Centella asiatica powder using a bag filter.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can adjust the cutting knife synchronously according to the weight of the material in the crushing bin by setting the rotating table, cutting knife and synchronous extension assembly, so that the materials at different heights in the crushing bin can be crushed evenly. The cutting knife can be adjusted synchronously according to the materials at different heights to ensure that the materials in each layer can be fully crushed. The synchronously adjusted cutting knife can ensure the uniformity of the materials during the crushing process. Whether it is the materials at high places or the materials at low places, the same crushing effect can be obtained, avoiding the problem of uneven crushing.

[0015] 2. The present invention can drive the cutting knife to swing up and down during cutting by providing a connecting cylinder, a rotating table and a synchronous swinging assembly, so that the cutting area covers a wider area, and the swing amplitude of the cutting knife is larger when there is more material in the crushing bin, and smaller when there is less material. By adjusting the swing amplitude according to the amount of material, it can be ensured that the material can be cut evenly at all heights, avoiding the situation where the material is piled up or not completely cut. When there is more material, increasing the swing amplitude can cut the material more effectively and reduce the increase in energy consumption caused by material accumulation. When there is less material, reducing the swing amplitude can reduce unnecessary energy consumption and realize efficient use of energy.

[0016] 3. The present invention can break up the lumps or adhesions formed during the crushing process of Centella asiatica by means of the pressure sensor, funnel bin, connecting rod and agglomeration breaking assembly, thereby avoiding the problem that when the lumps and adhesions of Centella asiatica come into contact with the solvent, the lumps and adhesions will hinder the penetration of the solvent, making it difficult for the solvent to come into contact with the Centella asiatica evenly and effectively. In addition, according to the amount of material, when there is a lot of material, the breaking rod can be extended at both ends and moved upward, thereby increasing the breaking area and force, ensuring that the material can be fully broken. When there is less material, the breaking rod is shortened and lowered accordingly, thereby avoiding excessive breaking and energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a cross-sectional schematic diagram of the present invention; Figure 3 This is a schematic diagram of the explosion structure of the crushing bin and the mounting plate of the present invention; Figure 4 It is a schematic diagram of the explosion structure of the synchronous extension component; Figure 5 It is a schematic diagram of the cross-sectional structure of the synchronous extension component; Figure 6 Schematic diagram of the internal structure of the rotating table; Figure 7 For the present invention Figure 7 The enlarged structural diagram at A in the middle; Figure 8 It is a schematic diagram of the cross-sectional structure of the synchronous swing component; Fig. 9 It is a schematic diagram of the structure of the funnel bin and the centrifugal cylinder; Fig.10 It is a schematic diagram of the cross-sectional structure of a centrifugal cylinder; Fig.11 This is a schematic diagram of the internal structure of the agglomeration crushing component; Fig.12 Schematic diagram of the internal structure of the breaker rod.

[0018] In the figure: 1, tank body; 2, placement rack; 3, mounting plate; 4, elastic telescopic rod; 5, crushing chamber; 6, funnel chamber; 7, mounting rack; 8, centrifugal cylinder; 9, connecting cylinder; 10, rotating table; 11, cutting knife; 12, closing plate; 13, first electric push rod; 14, synchronous extension assembly; 141, first oil tank; 142, first piston rod; 143, second oil tank; 144, second piston rod; 145, third oil tank; 146, third piston rod; 147. Two-way oil pipe; 148. Fourth piston rod; 15. Synchronous swing assembly; 151. Extrusion ring; 152. First oil chamber; 153. Fifth piston rod; 154. Extrusion rod; 155. Sixth piston rod; 16. Pressure sensor; 17. Connecting rod; 18. Agglomeration breaking assembly; 181. Breaking rod; 182. Second electric push rod; 183. Second oil chamber; 184. Seventh piston rod; 185. Eighth piston rod; 186. Extension rod. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figure 2 - Fig.12The present invention provides a preparation technology and method of a Centella asiatica extract with both whitening and acne-removing effects. Technical solution: A preparation technology and method of a Centella asiatica extract with both whitening and acne-removing effects, comprising a tank body 1, a placing rack 2 is installed on both sides of the tank body 1, a mounting plate 3 is installed on the middle of the inner wall of the tank body 1, an elastic telescopic rod 4 is installed on the surface of the mounting plate 3, a crushing bin 5 is installed on the top of the elastic telescopic rod 4, a funnel bin 6 is installed on the inner side of the mounting plate 3, a mounting rack 7 is installed on the inner wall of the lower end of the tank body 1, a centrifugal cylinder 8 is rotatably connected inside the mounting rack 7, and the top of the centrifugal cylinder 8 is rotatably connected to the bottom of the funnel bin 6 Dynamic connection, the top of the inner wall of the tank body 1 is rotatably connected with a sleeve rod, the surface of the sleeve rod is sleeved with a connecting tube 9, the top of the sleeve rod is connected to the output end of the motor, a rotating table 10 is arranged at the bottom of the connecting tube 9, three sets of cutting knives 11 are installed inside the rotating table 10, a closing plate 12 is rotatably connected to the bottom of the crushing bin 5, a first electric push rod 13 is installed at the bottom of the crushing bin 5, and the extended end of the first electric push rod 13 is connected to the closing plate 12, a pressure sensor 16 is installed on the surface of the mounting plate 3, a connecting rod 17 is installed at the bottom of the pressure sensor 16, and the bottom of the connecting rod 17 is connected to the inner wall of the centrifugal cylinder 8; A synchronous extension component 14 is arranged at the bottom of the crushing bin 5 and inside the rotating table 10. The synchronous extension component 14 can synchronously adjust the cutting knife 11 according to the amount of material inside the crushing bin 5, so that the cutting knife 11 can evenly crush the material inside the crushing bin 5; The synchronous swing component 15 is arranged at the upper end of the inner wall of the tank body 1 and inside the connecting tube 9. The synchronous swing component 15 can drive the cutting knife 11 to swing up and down when cutting. When there are more materials in the crushing bin 5, the swing amplitude of the cutting knife 11 is larger, and when there are fewer materials, the swing amplitude is smaller; The agglomeration breaking component 18 is arranged inside the connecting rod 17, and the agglomeration breaking component 18 can break up and break the agglomerations generated when the materials are crushed; When the crusher is crushing a large amount of Centella asiatica, due to the large amount of material, the crusher may need to run under a higher load. The crusher under high load may not be convenient to crush the Centella asiatica into a particle size suitable for extraction. Centella asiatica with too large or too small particles may affect the solvent penetration and solute dissolution in the extraction process. This embodiment of the present invention can solve the above problems. The specific implementation method is as follows: first, add Centella asiatica to the crushing bin 5 through the feed port at the top of the tank body 1. When the weight inside the crushing bin 5 increases, the first piston rod 142 will be squeezed downward, so that the oil inside the first oil tank 141 is injected into the second oil tank 143, pushing the second piston rod 144 to drive the middle cutting knife 11 to move upward. When the second piston rod 144 moves, the oil inside the second oil tank 143 will be injected into the third oil tank 145, so that the third piston rod 1 46 moves synchronously with the second piston rod 144, thereby causing the middle cutting knife 11 and the upper cutting knife 11 to move upward synchronously. When the upper cutting knife 11 moves upward, it will squeeze the fourth piston rod 148. At this time, the convex block at the top of the fourth piston rod 148 will drive the connecting tube 9 to move upward on the surface of the sleeve rod, thereby changing the contact position between the squeezing rod 154 and the inner wall of the squeezing ring 151. Then the motor drives the sleeve rod to drive the connecting tube 9 to rotate. At this time, the cutting knife 11 will crush the material inside the crushing bin 5. When the squeezing rod 154 conflicts with the inner wall of the squeezing ring 151, the squeezing rod 154 will squeeze and reset the fifth piston rod 153, causing the sixth piston rod 155 to extend or retract. When the sixth piston rod 155 extends or retracts, it will drive the connecting tube 9 to swing up and down, thereby increasing the crushing area of ​​the cutting knife 11.

[0021] As an embodiment of the present invention, the blade surfaces of the three groups of cutting knives 11 are all tilted downward, and the three groups of cutting knives 11 are distributed in a circular shape on the surface of the rotating table 10. The downward tilted cutting knives 11 can cleverly reduce the instantaneous resistance during cutting, making the cutting process smoother, reducing the direct friction and collision between the blades and the Centella asiatica, thereby reducing the difficulty of cutting.

[0022] As an embodiment of the present invention, the synchronous extension assembly 14 includes a first oil tank 141 installed at the bottom of the mounting plate 3, a first piston rod 142 is slidably arranged inside the first oil tank 141, and the top of the first piston rod 142 is connected to the bottom of the crushing bin 5. A second oil tank 143 is installed at the bottom of the internal cavity of the rotating table 10, and a second piston rod 144 is slidably connected inside the second oil tank 143. A circular plate is installed in the center of the middle and upper cutting blades 11, and the second piston rod 144 is connected to the bottom of the circular plate of the middle cutting blade 11. The circular plate of the middle cutting blade 11 A third oil tank 145 is installed inside the plate, and a third piston rod 146 is slidably connected inside the third oil tank 145. The third piston rod 146 is connected to the bottom of the circular plate of the upper cutting knife 11. A two-way oil pipe 147 is installed on the top of the rotating table 10. A fourth piston rod 148 slides inside the two-way oil pipe 147. A protrusion is connected to the top of the fourth piston rod 148. The protrusion slides in a limited position at the bottom of the connecting tube 9. The cutting knife 11 can be synchronously adjusted according to the weight of the material inside the crushing bin 5, so that materials at different heights in the crushing bin 5 can be evenly crushed.

[0023] As an embodiment of the present invention, the synchronous swing assembly 15 includes an extrusion ring 151 installed on the inner wall of the top end of the tank body 1, and also includes a first oil chamber 152 opened inside the connecting tube 9. A fifth piston rod 153 and a sixth piston rod 155 slide inside the first oil chamber 152. An extrusion rod 154 is installed at the end of the fifth piston rod 153. The bottom of the sixth piston rod 155 is connected to the top protrusion of the fourth piston rod 148. When cutting, the cutting knife 11 can be driven to swing up and down, so that the cutting area covers a wider area. When there is more material inside the crushing bin 5, the swing amplitude of the cutting knife 11 is larger, and when there is less material, the swing amplitude is smaller.

[0024] As an embodiment of the present invention, a conical notch is provided on the inner wall of the extrusion ring 151, with a larger opening at the upper end and a smaller opening at the lower end; the conical notch is distributed in a circular shape on the inner wall surface of the extrusion ring 151, and the design of the conical notch can adjust the swing amplitude of the cutting knife 11. When there is more material inside the crushing bin 5, the swing amplitude of the cutting knife 11 is larger, and when there is less material inside, the swing amplitude of the cutting knife 11 is smaller.

[0025] As an embodiment of the present invention, the first oil chamber 152 is in an "L" shape, and a rounded corner is provided at the end of the extrusion rod 154. The design of the "L"-shaped oil chamber can drive the rotating table 10 to move when the extrusion block is under pressure. The rounded corner at the end of the extrusion rod 154 can be retracted into the connecting tube 9 more effortlessly when being squeezed.

[0026] As an embodiment of the present invention, the agglomeration breaking assembly 18 includes two groups of breaking rods 181 installed inside the connecting rod 17, the lower breaking rod 181 is installed on the surface of the connecting rod 17, the upper breaking rod 181 slides within the connecting rod 17, a second oil chamber 183 is opened in the middle of the upper breaking rod 181, a second electric push rod 182 is installed at the bottom of the internal cavity of the connecting rod 17, the extended end of the second electric push rod 182 is connected to the bottom end of the middle of the upper breaking rod 181, a seventh piston rod 184 and an eighth piston rod 185 slide inside the second oil chamber 183, and an extension rod 186 is installed at the end of the eighth piston rod 185. The agglomeration breaking assembly 18 can break the agglomerates or adhesions formed during the crushing process of Centella asiatica, thereby avoiding the agglomerates and adhesions of Centella asiatica from coming into contact with the solvent, as the agglomerates and adhesions will hinder the penetration of the solvent.

[0027] As an embodiment of the present invention, the second oil chamber 183 is in a "T" shape; the eighth piston rod 185 and the extension rod 186 are in two groups, and they slide within the cavities at both ends of the upper breaking rod 181. The design of the "T"-shaped oil chamber can extend both ends synchronously when the upper breaking rod 181 rises, thereby increasing the crushing area and force and ensuring that the material can be fully crushed.

[0028] like Figure 1 A method for preparing a Centella asiatica extract having both whitening and acne-removing effects is shown, and the preparation method comprises the following steps: S1: Select high-quality Centella asiatica as raw material, ensure that it is free of impurities and mildew, crush the Centella asiatica raw material into 0.5-1 mm fine particles and powder, and transport the crushed Centella asiatica powder into the extraction device; S2: using an ultrasonic extractor, fully contact the raw material with a 70% ethanol solution, maintain the ratio of the added volume of the ethanol solution to the weight of the Centella asiatica powder at 2:1, raise and maintain the temperature at 50-60°C, mix the ethanol solution and the Centella asiatica powder for 2-4 hours for extraction; S3: After the ethanol solution and the Centella asiatica powder are evenly mixed, the mixed Centella asiatica and the solvent are placed in a centrifuge for centrifugal extraction at a speed of 5000-6500 r / min for an extraction time of 0.5-1 hour to extract the active ingredients in the Centella asiatica into the solvent; S4: Use a bag filter to remove 98% of the impurities and solid residues in the extract to obtain a clear extract. The temperature is set to 40-50°C and the pressure is set to 0.05-0.1MPa. The extract is concentrated to 10-20% by a vacuum concentrator. S5: Put the concentrated liquid into a vacuum microwave dryer, set the temperature to 40-60°C, dry for 2-4 hours to dry the concentrated extract into powder, and collect the dried Centella asiatica powder using a bag filter.

[0029] Centella asiatica has an antioxidant effect, can remove aging stratum corneum, accelerate skin metabolism, and has a good whitening function. Centella asiatica can tighten the connection between the epidermis and dermis, promote the formation of collagen in the dermis, reduce skin tension lines, and make the skin firm and smooth. Centella asiatica extract contains a variety of a-amyrin type triterpenoid components, which have a calming and stabilizing effect. Adding it to skin care products can help calm the skin and relieve sensitivity.

[0030] Working principle: When in use, first add Centella asiatica into the crushing bin 5 through the feed port at the top of the tank body 1. When the weight inside the crushing bin 5 increases, the first piston rod 142 will be pressed downward, so that the oil inside the first oil tank 141 will be injected into the second oil tank 143, pushing the second piston rod 144 to drive the middle cutting knife 11 to move upward. When the second piston rod 144 moves, the oil inside the second oil tank 143 will be injected into the third oil tank 145, so that the third piston rod 146 moves synchronously with the second piston rod 144, thereby causing the middle cutting knife 11 to move upward synchronously with the upper cutting knife 11. When the upper cutting knife 11 moves upward, it will The fourth piston rod 148 is squeezed, and the convex block at the top of the fourth piston rod 148 drives the connecting tube 9 to move upward on the sleeve rod surface, so that the contact position between the squeezing rod 154 and the inner wall of the squeezing ring 151 changes, and then the motor drives the sleeve rod to drive the connecting tube 9 to rotate. At this time, the cutting knife 11 will crush the material inside the crushing bin 5. When the squeezing rod 154 conflicts with the inner wall of the squeezing ring 151, the squeezing rod 154 squeezes and resets the fifth piston rod 153, so that the sixth piston rod 155 extends or contracts. When the sixth piston rod 155 extends or contracts, it drives the connecting tube 9 to swing up and down, thereby increasing the crushing area of ​​the cutting knife 11; After the material in the crushing bin 5 is ground, the crushed Centella asiatica is prone to form lumps or adhesions due to the residual moisture inside it. The first electric push rod 13 is used to rotate and open the closing plate 12 at the bottom of the crushing bin 5, so that the material passes through the funnel bin 6 and falls into the centrifugal drum 8. When the pressure sensor 16 detects the weight of the material inside the crushing bin 5, it will drive the extended end of the second electric push rod 182 to extend, and drive the upper end crushing rod 181 to move upward in the internal cavity of the connecting rod 17. When the upper end crushing rod 181 moves upward, it will squeeze the seventh piston rod 184, so that the eighth piston rod 185 drives the extension rod 186 to extend, thereby breaking up the lumps or adhesions of Centella asiatica. After the Centella asiatica particles enter the centrifugal drum 8, the ethanol solution is added to the tank body 1 to mix with the Centella asiatica particles, and then the centrifugal drum 8 is driven to rotate by the motor to extract the effective ingredients in the Centella asiatica into the solvent.

[0031] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. In the description of the present invention, unless otherwise specified, "multiple" means two or more; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A preparation technology of Centella asiatica extract with both whitening and acne-removing effects, comprising a tank (1), characterized in that: Placement racks (2) are installed on both sides of the tank body (1); a mounting plate (3) is installed in the middle of the inner wall of the tank body (1); an elastic telescopic rod (4) is installed on the surface of the mounting plate (3); a crushing bin (5) is installed on the top of the elastic telescopic rod (4); a funnel bin (6) is installed on the inner side of the mounting plate (3); a mounting rack (7) is installed on the inner wall of the lower end of the tank body (1); a centrifugal cylinder (8) is rotatably connected inside the mounting rack (7); the top of the centrifugal cylinder (8) is rotatably connected to the bottom of the funnel bin (6); a sleeve rod is rotatably connected to the top of the inner wall of the tank body (1); a connecting tube (9) is sleeved on the surface of the sleeve rod; The top end of the sleeve rod is connected to the output end of the motor; a rotating table (10) is provided at the bottom of the connecting cylinder (9); three groups of cutting knives (11) are installed inside the rotating table (10); a closing plate (12) is rotatably connected to the bottom of the crushing bin (5); a first electric push rod (13) is installed at the bottom of the crushing bin (5); the protruding end of the first electric push rod (13) is connected to the closing plate (12); a pressure sensor (16) is installed on the surface of the mounting plate (3); a connecting rod (17) is installed at the bottom of the pressure sensor (16); the bottom of the connecting rod (17) is connected to the inner wall of the centrifugal cylinder (8); a synchronous extension component (14), the synchronous extension component (14) being arranged at the bottom of the crushing bin (5) and inside the rotating table (10), the synchronous extension component (14) being capable of synchronously adjusting the cutting blade (11) according to the amount of material inside the crushing bin (5), so that the cutting blade (11) can evenly crush the material inside the crushing bin (5); A synchronous swing component (15), the synchronous swing component (15) being arranged at the upper end of the inner wall of the tank body (1) and inside the connecting tube (9), the synchronous swing component (15) being able to drive the cutting blade (11) to swing up and down when cutting, and the swing amplitude of the cutting blade (11) being larger when there is more material inside the crushing bin (5), and being smaller when there is less material; An agglomeration breaking component (18) is arranged inside the connecting rod (17), and the agglomeration breaking component (18) can break up and break up agglomerations generated when materials are crushed.

2. The preparation technology of the Centella asiatica extract having both whitening and acne-removing effects according to claim 1, characterized in that: The blade surfaces of the three groups of cutting knives (11) are all inclined downward, and the three groups of cutting knives (11) are distributed in a circular shape on the surface of the rotating table (10).

3. The preparation technology of the Centella asiatica extract having both whitening and acne-removing effects according to claim 1, characterized in that: The synchronous extension assembly (14) comprises a first oil tank (141) mounted at the bottom of the mounting plate (3), a first piston rod (142) slidingly arranged inside the first oil tank (141), the top end of the first piston rod (142) being connected to the bottom of the crushing bin (5), a second oil tank (143) mounted at the bottom end of the internal cavity of the rotating table (10), a second piston rod (144) slidingly arranged inside the second oil tank (143), a circular plate mounted at the center of the cutting knife (11) at the middle and the upper end, the second piston rod (144) and the cutting knife (11) at the middle The third oil tank (145) is installed inside the circular plate of the cutting knife (11) in the middle part, and a third piston rod (146) is slidably connected inside the third oil tank (145). The third piston rod (146) is connected to the bottom of the circular plate of the cutting knife (11) at the upper end. A two-way oil pipe (147) is installed at the top of the rotating table (10), and a fourth piston rod (148) is slidably connected inside the two-way oil pipe (147). A protrusion is connected to the top of the fourth piston rod (148), and the protrusion slides within the limit position at the bottom end of the connecting tube (9).

4. The preparation technology of the Centella asiatica extract having both whitening and acne-removing effects according to claim 1, characterized in that: The synchronous swing assembly (15) comprises an extrusion ring (151) mounted on the inner wall of the top end of the tank body (1), and also comprises a first oil chamber (152) opened inside the connecting tube (9), a fifth piston rod (153) and a sixth piston rod (155) sliding inside the first oil chamber (152), an extrusion rod (154) mounted on the end of the fifth piston rod (153), and a bottom of the sixth piston rod (155) connected to a top end protrusion of the fourth piston rod (148).

5. The preparation technology of the Centella asiatica extract having both whitening and acne-removing effects according to claim 4, characterized in that: The inner wall of the extrusion ring (151) is provided with a conical notch, with a larger opening at the upper end and a smaller opening at the lower end; the conical notches are distributed in a circular shape on the inner wall surface of the extrusion ring (151).

6. The preparation technology of the Centella asiatica extract having both whitening and acne-removing effects according to claim 4, characterized in that: The first oil chamber (152) is in an "L" shape, and the end of the extrusion rod (154) is provided with a rounded corner.

7. The preparation technology of the Centella asiatica extract having both whitening and acne-removing effects according to claim 1, characterized in that: The agglomeration crushing assembly (18) comprises two groups of crushing rods (181) installed inside the connecting rod (17), wherein the crushing rod (181) at the lower end is installed on the surface of the connecting rod (17), and the crushing rod (181) at the upper end slides within the connecting rod (17) in a limited manner, and a second oil chamber (183) is provided in the middle of the crushing rod (181) at the upper end, and a second electric push rod (182) is installed at the bottom of the internal cavity of the connecting rod (17), and the extended end of the second electric push rod (182) is connected to the bottom end of the middle of the crushing rod (181) at the upper end, and a seventh piston rod (184) and an eighth piston rod (185) slide within the second oil chamber (183), and an extension rod (186) is installed at the end of the eighth piston rod (185).

8. The preparation technology of the Centella asiatica extract having both whitening and acne-removing effects according to claim 7, characterized in that: The second oil chamber (183) is in a "T" shape; the eighth piston rod (185) and the extension rod (186) are provided in two groups and are limitedly slidable in the cavities at both ends of the upper breaking rod (181).

9. A method for preparing a Centella asiatica extract having both whitening and acne-removing effects, applied to the technology for preparing a Centella asiatica extract having both whitening and acne-removing effects as claimed in any one of claims 1 to 8, characterized in that: The method comprises the following steps: S1: Select high-quality Centella asiatica as raw material, ensure that it is free of impurities and mildew, crush the Centella asiatica raw material into 0.5-1 mm fine particles and powder, and transport the crushed Centella asiatica powder into the extraction device; S2: using an ultrasonic extractor, fully contact the raw material with a 70% ethanol solution, maintain the ratio of the added volume of the ethanol solution to the weight of the Centella asiatica powder at 2:1, raise and maintain the temperature at 50-60°C, mix the ethanol solution and the Centella asiatica powder for 2-4 hours for extraction; S3: After the ethanol solution and the Centella asiatica powder are evenly mixed, the mixed Centella asiatica and the solvent are placed in a centrifuge for centrifugal extraction at a speed of 5000-6500 r / min for an extraction time of 0.5-1 hour to extract the active ingredients in the Centella asiatica into the solvent; S4: Use a bag filter to remove 98% of the impurities and solid residues in the extract to obtain a clear extract. The temperature is set to 40-50°C and the pressure is set to 0.05-0.1MPa. The extract is concentrated to 10-20% by a vacuum concentrator. S5: Put the concentrated liquid into a vacuum microwave dryer, set the temperature to 40-60°C, dry for 2-4 hours to dry the concentrated extract into powder, and collect the dried Centella asiatica powder using a bag filter.

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