Areca seed core extract as well as preparation method and application thereof

Abstract

The invention provides a preparation method of an areca-nut core extract, which comprises the following steps: crushing areca-nut cores through a crusher, mixing the crushed areca-nut cores with water, heating and stirring in cooperation with a stirrer, and subsequently extracting to obtain an areca-nut extracting solution. Compared with the prior art, the method has the following beneficial effects that the water-phase material is subjected to refined filtration and macroporous resin adsorption so as to further remove arecoline dispute to body functions, condensed tannin with strong astringent taste and introduced sweetening agent components, and then the collected column passing liquid is subjected to refined filtration and ultrafiltration, so that the content of the astringent and the content of the sweetening agent components are further removed. The method can be used for removing possibly introduced resin scraps, macromolecular impurities polymerized in process treatment and the like, and controlling the pore size of a fine filtration and ultrafiltration membrane, so that macromolecular polysaccharide, protein, pectin and other components influencing the clarity of the extract can be more favorably removed.

Description

Technical Field

[0001] The present invention relates to an areca core extract, a preparation method thereof and an application thereof, belonging to the field of areca cores. Background Art

[0002] The areca belongs to the Palmae perennial evergreen tree, and its fruit is what people usually call areca. The areca contains rich functional active ingredients such as alkaloids, polyphenols, coumaric acid, flavonoids, polysaccharides, proteins, amino acids and fatty acids. Research shows that the polysaccharide extracted from the areca has good DPPH· scavenging ability and ferric ion reducing ability, and can significantly inhibit the oxidative damage of free radicals to human skin fibroblasts (HSF). The antibacterial experiment of the areca fruit extract in mice shows that compared with the ethyl acetate phase, the aqueous phase components have a more significant antibacterial effect, and the test substances show a certain dose-effect relationship. However, in practical applications, only a small part of the areca is used to prepare medicinal materials, and most of them are used to make edible areca chewing tablets, and accordingly, by-products areca cores will be produced. The abandonment of a large number of areca cores wastes areca resources, threatens environmental safety at the same time, and brings huge cost pressure in the waste treatment process.

[0003] When extracting the areca core for preparing additives or food ingredients with areca flavor, the recycling of the areca core can be realized. When preparing edible areca chewing tablets, usually, the whole areca fruit is successively subjected to processes such as washing, boiling seeds, retting, drying, flavoring, and rolling glue, and then sliced to remove the core. That is, when making edible areca chewing tablets, corresponding sweeteners and essence spices will be introduced into the by-product areca core, which will result in a strong sweet smell of the areca core extract, thus affecting its original areca flavor. The areca core is rich in arecoline and polyphenols, and the polyphenol components have a strong astringent taste, seriously affecting the taste, which all bring huge challenges to the recycling application problem of the areca core. Therefore, the present application proposes an areca core extract, a preparation method thereof and an application thereof. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an areca core extract, a preparation method thereof and an application thereof.

[0005] In order to achieve the above purpose, the present invention is realized through the following technical solutions:

[0006] According to one aspect of the present invention, a preparation method of an areca core extract is provided.

[0007] The preparation method of the areca core extract includes the following steps:

[0008] The betel nut core is crushed by a crusher, and then the crushed betel nut core is mixed with water and heated and stirred with a stirrer, followed by extraction to obtain a betel nut extract. The weight ratio of water to betel nut core is 3:1;

[0009] The betel nut extract is subjected to first fine filtration, and the filtrate is taken for extraction, and the aqueous phase material is collected. The membrane pore size of the first fine filtration is 3μm - 5μm;

[0010] The aqueous phase material is subjected to second fine filtration, and the filtrate is adsorbed and purified with macroporous resin, and the resin is displaced with water, and the column-passing liquid is collected. The membrane pore size of the second fine filtration is 0.4μm - 2μm;

[0011] The column-passing liquid is successively subjected to third fine filtration and ultrafiltration, and the filtrate is collected. The membrane pore size of the third fine filtration is 0.5μm - 1.0μm, and the membrane pore size of the ultrafiltration is 3000Da - 8000Da;

[0012] The height-diameter ratio of the macroporous resin packing is 5:1, the column loading flow rate is 0.5BV / h - 1.0BV / h, and the sample loading amount of the macroporous resin and the aqueous phase material is: for each milliliter of the macroporous resin, the aqueous phase material with a solid content of 0.10g - 0.22g corresponds. Before the first fine filtration step, a step of centrifuging the betel nut extract is further included, and the separation factor of the centrifugal equipment used in the centrifugation is ≥5000.

[0013] Furthermore, the application of the betel nut core extract in the preparation of betel nut products with betel nut flavor.

[0014] Furthermore, the crusher includes a crushing box, two opposite rollers are arranged inside the crushing box, crushing teeth are evenly distributed on the opposite rollers, a driving assembly for driving the opposite rollers is arranged outside the crushing box, a screening box is communicated with the bottom end of the crushing box, a screening assembly is arranged inside the screening box, and a collecting box is communicated with the bottom end of the screening box.

[0015] Furthermore, the driving assembly includes a driving motor with a motor plate fixed on the outer wall of the crushing box. A gear is arranged on the output end rod of the driving motor, a secondary gear is meshed on one side of the gear, connecting rods penetrating into the inside of the crushing box are fixed on one side of the central axes of the secondary gear and the gear, and the connecting rods are connected to the corresponding opposite rollers. Two bearing ones are arranged on the outer wall of the crushing box, the inner ring of the bearing one is connected with a secondary connecting rod, the secondary connecting rod penetrates into the crushing box and is connected to the other end of the corresponding opposite roller.

[0016] Further, the screening component includes a screening frame disposed inside the screening box. A screening mesh is provided inside the screening frame. The screening frame is inclined downward. An inclined downward discharge channel is provided on the outer wall of the screening box. The inclined bottom end side of the screening frame is located inside the discharge channel. A support member for supporting the screening frame is also provided inside the screening box. The number of the support members is four, and the support members are correspondingly arranged at the bottom four corners of the screening frame.

[0017] Further, the support member includes a fixing plate fixed to the inner wall of the screening box. A reset member is used to connect the fixing plate and the screening frame. The reset member includes a reset spring. Installation pieces are fixedly provided at the top and bottom ends of the reset spring. The installation pieces are fixed to the fixing plate and the screening frame by screws. A dust-proof bellows sleeving the reset spring is fixedly provided between the installation pieces.

[0018] Further, two bearing two corresponding to the bearing one are provided on the outer wall of the screening box. A rotating rod is provided on the bearing two. I-shaped transmission wheels are provided on the outer surface of the rotating rod. I-shaped secondary transmission wheels are provided on the outer surface of the secondary connecting rod. The secondary transmission wheels and the corresponding transmission wheels are connected by a conveyor belt. The rotating rod is a thin rod. The rotating rod penetrates into the screening box, and an oval plate is fixedly provided at the penetrating end of the rotating rod.

[0019] Further, one end of the discharge channel far away from the screening box is fixedly and communicatively provided with a feeding cylinder. A conveying roller is provided inside the feeding cylinder. Conveying blades are arranged on the conveying roller. A secondary driving motor for driving the conveying roller is provided at the top of the feeding cylinder. An L-shaped secondary motor plate is fixedly provided on the outer wall of the collecting box. An electric push rod is provided on the secondary motor plate. The output end rod of the electric push rod is connected with a pushing plate located inside the collecting box. A fixing rod is fixedly provided at one end of the pushing plate. A blocking plate is fixedly provided at the other end of the fixing rod.

[0020] Further, the bottom of the feeding cylinder is open, and a blocking member is provided at the bottom of the feeding cylinder. The blocking member includes a T-shaped frustum. A sealing ring is pasted on the frustum. An installation table is provided on the outer surface of the bottom of the feeding cylinder. A threaded rod penetrating the installation table is fixedly provided on the frustum. A nut is sleeved on the penetrating top of the threaded rod. The stirrer includes a stirring box. Two stirring rods are provided inside the stirring box. Stirring blades are provided on the stirring rods. The top ends of the stirring rods all penetrate out of the stirring box, and pulley wheels are sleeved on the outer surfaces of the penetrating ends of the stirring rods. A belt is connected between the pulley wheels. A stirring motor connecting one of the stirring rods is arranged on the outer side of the stirring box. A fixing column is fixedly provided in the middle of the stirring box. An electric heating rod is wound around the fixing column.

[0021] According to another aspect of the present invention, there is provided a betel nut core extract prepared by the preparation method of the betel nut core extract described above.

[0022] According to still another aspect of the present invention, there is provided the use of the betel nut core extract in the preparation of betel nut products with betel nut flavor.

[0023] Advantages of the present invention:

[0024] In the present invention, the betel nut core is pulverized, and then heated and mixed with water, so that the heated water can heat the pulverized betel nut core, better extract the extract in the betel nut core, mix it with water, and control the dosage ratio of the betel nut core to water within a specific range. Then, the betel nut extract is finely filtered and extracted to remove insoluble or hardly soluble betel nut core tissue debris, fat-soluble impurities, flavoring agents, and some arecoline components. Moreover, the membrane pore size of the fine filtration is limited, which is beneficial to removing colloidal impurities and the like in the extraction step. Then, the aqueous phase material is finely filtered and adsorbed by macroporous resin to further remove arecoline, condensed tannins with strong astringency, and introduced sweetener components that are controversial to the body function. Then, the collected column-passing liquid is finely filtered and ultrafiltered to remove possible resin debris, macromolecular impurities polymerized in the process treatment, etc. Moreover, the membrane pore sizes of the fine filtration and ultrafiltration are controlled, which is more beneficial to removing macromolecular polysaccharides, proteins, pectins, etc. that affect the clarity of the extract.

[0025] In the preparation method of the betel nut core extract of the present invention, each step and parameter cooperate with each other to effectively remove arecoline, polyphenols, sweeteners, and flavoring agents in the betel nut core, so that the prepared betel nut core extract has the flavor characteristics of betel nuts, and has no astringency and sweetness, with natural flavor and good palatability. The clarity of the extract in the water-soluble state is better, and the solubility is stable at different pH values. At the same time, it is also suitable for making solid beverages, candies, chewing gums, milk teas, biscuits, and flavored breads with betel nut flavor characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 Shows a schematic flow chart of the steps of a betel nut core extract and its preparation method of the present application;

[0028] Figure 2 Shows a schematic overall view of a crusher in a betel nut core extract and its preparation method of the present application;

[0029] Figure 3 Shows the overall schematic diagram of the support in an areca core extract and its preparation method of the present application;

[0030] Figure 4 Shows the internal schematic diagram of the feeding cylinder in an areca core extract and its preparation method of the present application;

[0031] Figure 5 Shows the internal schematic diagram of the collection box in an areca core extract and its preparation method of the present application;

[0032] Figure 6 Shows the overall schematic diagram of the frustum in an areca core extract and its preparation method of the present application;

[0033] Figure 7 Shows the overall schematic diagram of the stirrer in an areca core extract and its preparation method of the present application.

[0034] In the figure: 1, crushing box; 2, opposing rollers; 3, crushing teeth; 4, screening box; 5, collection box; 6, driving motor; 7, gear; 8, sub-gear; 9, connecting rod; 10, bearing one; 11, sub-connecting rod; 12, screening frame; 13, screening mesh; 14, discharge channel; 15, support; 16, fixing plate; 17, return spring; 18, mounting plate; 19, dust-proof bellows; 20, bearing two; 21, rotating rod; 22, transmission wheel; 23, sub-transmission wheel; 24, conveyor belt; 25, oval plate; 26, feeding cylinder; 27, conveying roller; 28, conveying blade; 29, sub-driving motor; 30, sub-motor plate; 31, electric push rod; 32, pushing plate; 33, fixing rod; 34, blocking plate; 35, frustum; 36, sealing ring; 37, mounting table; 38, threaded rod; 39, stirring box; 40, stirring rod; 41, pulley; 42, electric heating rod. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] Please refer to Figure 1 , a preparation method of an areca core extract, comprising the following steps:

[0037] Crush the areca core through a crusher, then mix the crushed areca core with water, cooperate with a stirrer for heating and stirring, and then perform extraction to obtain an areca extract. The weight ratio of water to areca core is 3:1;

[0038] Perform first fine filtration on the areca nut extract, take the filtrate for extraction, and collect the aqueous phase material. The membrane pore size of the first fine filtration is 3 μm - 5 μm;

[0039] Perform second fine filtration on the aqueous phase material, take the filtrate and use macroporous resin for adsorption and impurity removal, drive the material with water, and collect the column passing liquid; the membrane pore size of the second fine filtration is 0.4 μm - 2 μm;

[0040] Perform third fine filtration and ultrafiltration on the column passing liquid in sequence, and collect the filtrate. The membrane pore size of the third fine filtration is 0.5 μm - 1.0 μm, and the membrane pore size of the ultrafiltration is 3000 Da - 8000 Da;

[0041] The height - to - diameter ratio of the macroporous resin packing is 5:1, the column loading flow rate is 0.5 BV / h - 1.0 BV / h, and the sample loading amount of the macroporous resin and the aqueous phase material is: for each milliliter of the macroporous resin, it corresponds to the aqueous phase material with a solid content of 0.10 g - 0.22 g. Before the first fine filtration step, there is also a step of centrifuging the areca nut extract, and the separation factor of the centrifugal equipment used in the centrifuging is ≥5000.

[0042] Refer to Figure 2, the crusher includes a crushing box 1, two opposing rollers 2 are arranged inside the crushing box 1, crushing teeth 3 are evenly distributed on the opposing rollers 2, a driving assembly for driving the opposing rollers 2 is arranged outside the crushing box 1, the bottom end of the crushing box 1 is communicated with a screening box 4, a screening assembly is arranged inside the screening box 4, the bottom end of the screening box 4 is communicated with a collection box 5, the driving assembly includes a driving motor 6 with a motor plate fixed on the outer wall of the crushing box 1, a gear 7 is arranged on the output end rod of the driving motor 6, a secondary gear 8 is meshed on one side of the gear 7, connecting rods 9 penetrating into the inside of the crushing box 1 are fixedly arranged on one side of the central axes of the secondary gear 8 and the gear 7, and the connecting rods 9 are connected with the corresponding opposing rollers 2, two bearings one 10 are arranged on the outer wall of the crushing box 1, a secondary connecting rod 11 is connected to the inner ring of the bearing one 10, the secondary connecting rod 11 penetrates into the crushing box 1 and is connected with the other end of the corresponding opposing roller 2, the screening assembly includes a screening frame 12 arranged inside the screening box 4, a screening mesh 13 is arranged inside the screening frame 12, the screening frame 12 is inclined downward, a discharge channel 14 inclined downward is arranged on the outer wall of the screening box 4, the inclined bottom end side of the screening frame 12 is located inside the discharge channel 14, a support member 15 for supporting the screening frame 12 is further arranged inside the screening box 4, the number of the support members 15 is four, and the support members 15 are correspondingly arranged at the bottom four corners of the screening frame 12. First, put the betel nut core into the crushing box 1, and cooperate with the opposing rollers 2 and the crushing teeth 3 to complete the crushing work of the betel nut core. The driving motor 6 directly drives the gear 7 to rotate, and the gear 7 and the secondary gear 8 are meshed in reverse rotation. Finally, the opposing rollers 2 rotate relative to each other to complete the crushing work of the betel nut core. For subsequent screening, cooperate with the screening mesh 13 to carry out the screening work, re-transport the poorly crushed betel nut core to the crushing box 1 for re-crushing to ensure the crushing effect. Finally, collect it in the collection box 5 for final collection.

[0043] Refer to Figure 3, the support member 15 includes a fixing plate 16 fixed to the inner wall of the screening box 4. The fixing plate 16 and the screening frame 12 are connected by a reset member. The reset member includes a reset spring 17. Installation pieces 18 are fixedly provided at both the top end and the bottom end of the reset spring 17. The installation pieces 18 are fixed to the fixing plate 16 and the screening frame 12 by screws. A dust-proof bellows 19 sleeving the reset spring 17 is fixedly provided between the installation pieces 18. Two bearing two 20 corresponding to the bearing one 10 are provided on the outer wall of the screening box 4. A rotating rod 21 is provided on the bearing two 20. An I-shaped transmission wheel 22 is provided on the outer surface of the rotating rod 21. An I-shaped secondary transmission wheel 23 is provided on the outer surface of the secondary connecting rod 11. The secondary transmission wheel 23 and the corresponding transmission wheel 22 are connected by a conveyor belt 24. The rotating rod 21 is a thin rod. The rotating rod 21 penetrates into the screening box 4, and an oval plate 25 is fixedly provided at the penetrating end of the rotating rod 21. The design of the reset spring 17 ensures that the screening frame 12 can support on the one hand, and on the other hand, the screening frame 12 has a certain vibration property to ensure the screening effect. And the reset spring 17 ensures that the screening frame 12 has good reset performance. During the separation and screening of betel nut cores and the crushing process, the I-shaped transmission wheel rotates, and the conveyor belt drives the secondary transmission wheel 23 to rotate. Finally, the rotating rod 21 (the number of rotating rods 21 is two) synchronously drives the oval plate 25 to rotate together. During the rotation of the rotating rod 21, it will hit the screening frame 12, thereby driving the screening frame 12 to vibrate, ensuring the screening efficiency and effect.

[0044] Refer to Figure 2 , Figure 4 and Figure 5 , one end of the discharge channel 14 far away from the screening box 4 is fixedly and communicatively provided with a feeding cylinder 26. A conveying roller 27 is provided inside the feeding cylinder 26. Conveying blades 28 are arranged on the conveying roller 27. A secondary driving motor 29 for driving the conveying roller 27 is provided at the top end of the feeding cylinder 26. An L-shaped secondary motor plate 30 is fixedly provided on the outer wall of the collection box 5. An electric push rod 31 is provided on the secondary motor plate 30. The output end rod of the electric push rod 31 is connected to a pushing plate 32 located inside the collection box 5. A fixing rod 33 is fixedly provided at one end of the pushing plate 32. A blocking plate 34 is fixedly provided at the other end of the fixing rod 33. The secondary driving motor 29 drives the conveying roller 27 and the conveying blades 28 to re-discharge the poorly crushed betel nut cores into the crushing box for crushing. The electric push rod 31 pushes the pushing plate 32 to collect and discharge the crushed materials collected above.

[0045] Refer to Figure 6 and Figure 7, the bottom of the feeding cylinder 26 is open, and a blocking member is provided at the bottom of the feeding cylinder 26. The blocking member includes a frustum 35 in a T shape. A sealing ring 36 is pasted on the frustum 35. An installation table 37 is provided on the outer surface of the bottom of the feeding cylinder 26. A threaded rod 38 passing through the installation table 37 is fixedly provided on the frustum 35. A nut is sleeved on the top of the threaded rod 38 passing through. The stirrer includes a stirring box 39. Two stirring rods 40 are provided inside the stirring box 39. Stirring blades are provided on the stirring rods 40. The tops of the stirring rods 40 all penetrate out of the stirring box 39, and pulley 41 is sleeved on the outer surface of the penetrating ends of the stirring rods 40. A belt is connected between the pulleys 41. A stirring motor connecting one of the stirring rods 40 is arranged on the outside of the stirring box 39. A fixed column is fixedly provided in the middle of the stirring box 39. An electric heating rod 42 is wound around the fixed column. The frustum 35 is detachable to manually clean the residual waste at the inner bottom of the feeding cylinder 26. The electric heating rod 42 completes the heating of the water inside the stirring, and cooperates with the stirring blades to complete the stirring.

[0046] In the above optional embodiment, a betel nut core extract is provided, which is prepared by the preparation method of the betel nut core extract described above.

[0047] In addition, in the above embodiment, the application of the betel nut core extract in the preparation of betel nut products with betel nut flavor is also provided.

[0048] During specific work, the present invention crushes the betel nut core, and then mixes it with heated water, so that the heated water can heat the crushed betel nut core to better boil out the extract in the betel nut core, mix it with water, and control the dosage ratio of the betel nut core to water within a specific range. Then, the betel nut extract is finely filtered and extracted to remove insoluble or hardly soluble betel nut core tissue debris, fat-soluble impurities, essence and part of the arecoline components. And the membrane pore diameter of the fine filtration is limited, which is beneficial to removing colloidal impurities and the like in the extraction step. Then, the aqueous phase material is finely filtered and adsorbed by macroporous resin to further remove arecoline, condensed tannins with strong astringency and introduced sweetener components that are controversial to the body function. Then, the collected column-passing liquid is finely filtered and ultrafiltered to remove possible resin debris, polymerized macromolecular impurities in the process treatment, etc. And the membrane pore diameters of the fine filtration and ultrafiltration are controlled, which is more beneficial to removing macromolecular polysaccharides, proteins, pectins and other components affecting the clarity of the extract.

[0049] In the above-mentioned preparation method of the areca core extract of the present invention, each step and parameter act synergistically to effectively remove arecoline, polyphenols, sweeteners, and flavorings from the areca core, so that the prepared areca core extract has the flavor characteristics of areca, and has no astringency and sweetness, with a natural flavor and good palatability. The clarity of the extract in the aqueous solution state is good, and the solubility is stable at different pH values, and it is also suitable for making solid beverages, candies, chewing gums, milk teas, biscuits, and flavored breads with the flavor characteristics of areca.

[0050] Although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for preparing a betel nut core extract, characterized in that: The following steps are involved: Step S001, crushing the betel nut core by a crusher, mixing the crushed betel nut core with water, heating and stirring with a stirrer, and then extracting to obtain a betel nut extract, wherein the weight ratio of water to betel nut core is 3:1; Step S002, subjecting the betel nut extract to a first fine filtration, extracting the filtrate, and collecting the aqueous phase material, wherein the pore size of the membrane for the first fine filtration is 3 μm-5 μm; Step S003, subjecting the aqueous phase material to a second fine filtration, taking the filtrate and using a macroporous resin to adsorb and remove impurities, using water to drive out the material, and collecting the column liquid; the pore size of the membrane for the second fine filtration is 0.4 μm-2 μm; Step S004, subjecting the column liquid to a third fine filtration and an ultrafiltration in sequence, and collecting the filtrate, wherein the pore size of the membrane of the third fine filtration is 0.5 μm-1.0 μm, and the pore size of the membrane of the ultrafiltration is 3000 Da-8000 Da; The height-to-diameter ratio of the macroporous resin is 5:1, the column flow rate is 0.5BV / h-1.0BV / h, the loading amount of the macroporous resin and the aqueous phase material is: each milliliter of the macroporous resin corresponds to the aqueous phase material with a solid content of 0.10g-0.22g. Before performing the first fine filtration step, the betel nut extract is also centrifuged, and the separation factor of the centrifugal equipment used in the centrifugation is ≥5000.

2. The method for preparing the betel nut core extract according to claim 1, characterized in that: The crusher comprises a crushing box (1), two relative rollers (2) are arranged inside the crushing box (1), crushing teeth (3) are evenly distributed on the relative rollers (2), a driving assembly for driving the relative rollers (2) is arranged on the outside of the crushing box (1), a screening box (4) is connected to the bottom end of the crushing box (1), a screening assembly is arranged inside the screening box (4), and a collecting box (5) is connected to the bottom end of the screening box (4).

3. The method for preparing the betel nut core extract according to claim 2, characterized in that: The driving assembly comprises a driving motor (6) with a motor plate fixed on the outer wall of the crushing box (1), the output end rod of the driving motor (6) is provided with a gear (7), one side of the gear (7) is meshed with a sub-gear (8), the sub-gear (8) and one side of the central axis of the gear (7) are fixed with a connecting rod (9) penetrating into the interior of the crushing box (1), and the connecting rod (9) is connected to the corresponding relative roller (2), two bearings (10) are provided on the outer wall of the crushing box (1), the inner ring of the bearing (10) is connected with a sub-connecting rod (11), and the sub-connecting rod (11) passes through the crushing box (1) and is connected to the other end of the corresponding relative roller (2).

4. The method for preparing the betel nut core extract according to claim 3, characterized in that: The screening assembly comprises a screening frame (12) arranged inside the screening box (4), a screening net (13) being arranged inside the screening frame (12), the screening frame (12) being inclined downward, a downwardly inclined discharge channel (14) being arranged on the outer wall of the screening box (4), the inclined bottom end side of the screening frame (12) being located inside the discharge channel (14), and a support member (15) supporting the screening frame (12) being arranged inside the screening box (4), the number of the support members (15) being four, and the support members (15) being arranged correspondingly at the bottom four corners of the screening frame (12).

5. The method for preparing the betel nut core extract according to claim 4, characterized in that: The support member (15) includes a fixing plate (16) fixed to the inner wall of the screening box (4), the fixing plate (16) and the screening frame (12) are connected via a reset member, the reset member includes a reset spring (17), the top and bottom ends of the reset spring (17) are fixed with mounting plates (18), the mounting plates (18) are fixed to the fixing plate (16) and the screening frame (12) by means of screws, and a dustproof bellows (19) on which the reset spring (17) is mounted is fixed between the mounting plates (18).

6. The method for preparing the betel nut core extract according to claim 5, characterized in that: Two bearings (20) corresponding to the bearings (10) are arranged on the outer wall of the screening box (4); a rotating rod (21) is arranged on the bearings (20); an I-shaped transmission wheel (22) is arranged on the outer surface of the rotating rod (21); an I-shaped auxiliary transmission wheel (23) is arranged on the outer surface of the auxiliary connecting rod (11); the auxiliary transmission wheel (23) and the corresponding transmission wheel (22) are connected by a conveyor belt (24); the rotating rod (21) is a thin rod; the rotating rod (21) penetrates into the screening box (4); and an elliptical plate (25) is fixedly arranged at the penetration end of the rotating rod (21).

7. The method for preparing the betel nut core extract according to claim 6, characterized in that: The end of the discharge channel (14) away from the screening box (4) is fixedly connected to a feeding cylinder (26), a conveying roller (27) is arranged inside the feeding cylinder (26), and a conveying blade (28) is arranged on the conveying roller (27). The top of the feeding cylinder (26) is provided with an auxiliary driving motor (29) for driving the conveying roller (27). An L-shaped auxiliary motor plate (30) is fixedly provided on the outer wall of the collecting box (5), and an electric push rod (31) is provided on the auxiliary motor plate (30). The output end rod of the electric push rod (31) is connected to a pushing plate (32) located inside the collecting box (5), and a fixing rod (33) is fixedly provided at one end of the pushing plate (32), and a sealing plate (34) is fixedly provided at the other end of the fixing rod (33).

8. The method for preparing the betel nut core extract according to claim 7, characterized in that: The bottom of the feeding barrel (26) is open, and a plugging member is provided at the bottom of the feeding barrel (26), the plugging member comprises a T-shaped round table (35), a sealing ring (36) is pasted on the round table (35), a mounting platform (37) is provided on the outer surface of the bottom of the feeding barrel (26), a threaded rod (38) passing through the mounting platform (37) is fixed on the round table (35), a nut is sleeved on the top of the threaded rod (38), and the agitator comprises a mixing box (39), and the mixing box (39) has a plurality of inner and outer surfaces. Two stirring rods (40) are provided at the bottom, and stirring blades are arranged on the stirring rods (40). The tops of the stirring rods (40) are all passed through the stirring box (39), and the outer surfaces of the through ends of the stirring rods (40) are sleeved with pulleys (41), and belts are connected between the pulleys (41). A stirring motor connected to one of the stirring rods (40) is arranged on the outside of the stirring box (39), and a fixing column is fixedly provided in the middle of the stirring box (39), and an electric heating rod (42) is wound around the fixing column.

9. A betel nut core extract, characterized in that The betel nut core extract is prepared by the preparation method of the betel nut core extract according to any one of claims 1 to 8.

10. Use of the betel nut core extract according to claim 9 in preparing betel nut products with betel nut flavor.

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