Device and method for extracting natural tea essence

Abstract

The present application relates to an extraction device and method for natural tea essence, which includes a processing platform, an extraction axe is provided on the processing platform; the extraction axe is provided with a cleaning chamber and an extraction chamber that are independent of each other, the cleaning chamber is provided with a raw material cleaning mechanism, the processing platform is also provided with a raw material processing tank located outside the extraction axe, the raw material processing tank is provided with a drying mechanism and a crushing mechanism; a feeding pipe is provided between the extraction axe and the raw material processing tank, the discharge port of the feeding pipe is used to pump the cleaned tea raw materials to the drying mechanism; the discharge port of the drying mechanism is used to feed the dried tea raw materials into the crushing mechanism for crushing; a filling pipe is provided between the discharge port of the crushing mechanism and the extraction chamber. The present application has the effect of optimizing the preparation link of tea raw materials, improving production efficiency, and reducing the loss of tea raw materials in the preparation link, so as to ensure the later essence production.

Description

Technical Field

[0001] The present application relates to the technical field of flavor extraction devices, and in particular to a device and method for extracting natural tea flavor. Background Art

[0002] Currently, supercritical CO2 extraction is commonly used on the market to extract natural tea flavors. Supercritical CO2 extraction is a separation technology that uses CO2 in a supercritical state as a solvent to extract specific components from liquids or solids. Its basic principle is: in the supercritical state, CO2 becomes a single phase with properties between liquid and gas, with a density close to that of liquid, a viscosity higher than that of gas but significantly lower than that of liquid, and a diffusion coefficient 100 times that of liquid; the migration or distribution of chemical substances in it is faster than in liquid solvents, and the solubility increases with increasing density; by appropriately changing the temperature or pressure, the solubility can be varied within a larger range, which is conducive to extracting components of different solubility from the substance, accelerating the dissolution equilibrium, and improving the extraction efficiency.

[0003] The supercritical CO2 extraction process mainly includes: preparing the raw materials, selecting fresh and cleaned tea leaves as the raw materials, ensuring that the tea leaves are clean, and chopping or grinding them into the appropriate particle size as needed to increase the extraction efficiency; loading the extraction kettle, loading the prepared tea leaves into the extraction kettle of the supercritical extraction device; pressurizing and heating the system, starting the equipment, injecting liquid CO2 into the system, and gradually increasing the pressure and temperature to above the supercritical point (usually pressure above 7.38MPa and temperature above 31.1℃). This step causes the CO2 to enter a supercritical state, with gas-like diffusivity and liquid-like solubility; starting the extraction process. When the system reaches the set pressure and temperature, supercritical CO2 begins to circulate through the tea material. During this process, the aroma components and other soluble substances in the tea leaves are dissolved in the supercritical CO2. The separated products, the supercritical CO2 containing the extracted components, are directed to the separator, where the CO2 is returned to a gaseous state through pressure reduction and cooling, releasing the tea essence components it carries.

[0004] After cleaning, tea leaves must be dried to control their moisture content. Water, a polar substance, competes with supercritical CO2 (a non-polar solvent) for target components, reducing the extraction efficiency of fat-soluble substances (such as tea polyphenols and theaflavins). Consequently, during the raw material preparation process, tea leaves must be manually transported between different equipment multiple times, a time-consuming and labor-intensive process that reduces production efficiency. Furthermore, this transport process can easily lead to loss of raw tea leaves, reducing yield. Summary of the Invention

[0005] The present application provides an extraction device and method for natural tea flavor, which can optimize the preparation process of tea raw materials, improve production efficiency, reduce the loss of tea raw materials in the preparation process, and ensure the effect of later flavor production.

[0006] The present application provides a device for extracting natural tea essence using the following technical solutions:

[0007] A device for extracting natural tea essence, including a processing platform, on which an extraction axe is provided; the extraction axe is provided with a cleaning chamber and an extraction chamber that are independent of each other, and the cleaning chamber is located above the extraction chamber; the cleaning chamber is provided with a raw material cleaning mechanism, and the raw material cleaning mechanism is used to clean the tea raw materials; the processing platform is also provided with a raw material processing tank located outside the extraction axe, and the raw material processing tank is provided with a drying mechanism and a crushing mechanism; a feeding pipeline is provided between the extraction axe and the raw material processing tank, the feeding port of the feeding pipeline is connected to the cleaning chamber, and the discharging port of the feeding pipeline is used to pump the cleaned tea raw materials to the drying mechanism; the discharging port of the drying mechanism is used to feed the dried tea raw materials into the crushing mechanism for crushing; a filling pipeline is provided between the discharging port of the crushing mechanism and the extraction chamber.

[0008] Preferably, the raw material cleaning mechanism includes a cleaning cylinder rotatably arranged in the cleaning chamber, and a drainage hole is passed through the circumferential outer wall of the cleaning cylinder; the raw material cleaning mechanism also includes a rotating motor installed on the outer wall of the top of the extraction axe, and the output shaft of the rotating motor is provided with a driving rod coaxial with the rotating axis of the cleaning cylinder, and the driving rod is fixedly connected to the rotating axis of the cleaning cylinder; a plurality of discharge grooves are passed through the bottom of the cleaning cylinder, and a discharge hopper located below the cleaning cylinder is provided on the inner wall of the extraction axe, and the discharge hopper is used to separate the cleaning chamber and the extraction chamber from each other; the feed port of the feed pipeline is connected to the discharge port at the bottom of the discharge hopper.

[0009] Preferably, a lifting frame is provided in the cleaning cylinder for lifting, and a sealing piece is provided at the bottom of the lifting frame, which is opposite to the discharge groove one by one, and the shape of the sealing piece is adapted to the shape of the respective opposite discharge groove; the sealing piece is used to be respectively inserted and fixed in the discharge groove and to seal the discharge groove; a drainage interlayer is formed between the circumferential outer wall of the cleaning cylinder and the inner wall of the cleaning cavity, and a drainage pipe connected to the drainage interlayer is provided on the outer wall of the extraction axe.

[0010] Preferably, a lifting cylinder is provided on the top outer wall of the extraction axe, and the piston rod of the lifting cylinder extends into the cleaning chamber; a loading channel is provided on the top of the extraction axe, and the bottom of the loading channel extends into the cleaning chamber; a lifting cover is provided on the piston rod of the lifting cylinder, and the lifting cover is movably passed through the outside of the driving rod and the loading channel; a first limit platform and a second limit platform are circumferentially arranged on the top outer wall of the lifting frame, the first limit platform and the second limit platform are coaxially arranged, and the first limit platform is located above the second limit platform; the first limit platform is fixedly arranged on the top of the lifting frame, and the second limit platform is slidably sleeved on the outside of the lifting frame along the lifting direction of the lifting cover; a plug-in slot is formed between the first limit platform and the second limit platform, and a plurality of connectors for synchronously inserting or withdrawing from the plug-in slot are circumferentially arranged on the lifting cover, and the connector inserted into the plug-in slot will rotate relative to the lifting frame.

[0011] Preferably, a plurality of material chutes are passed through the lifting frame, and an insert plate adapted to the shape of each material chutes is provided at the bottom of the cleaning cylinder, and the insert plate inserted into the material chutes is used to seal the material chutes; a scraper plate located below the lifting cover is coaxially fixed on the output shaft of the rotating motor, the scraper plate is located in the cleaning cylinder, and the scraper plate is located on the rising path of the lifting frame.

[0012] Preferably, the drying mechanism includes a bracket fixedly installed in the raw material processing tank, on which multiple layers of raw material conveyor belts are rotatably arranged, and the bracket is also provided with heating components respectively mounted above each layer of raw material conveyor belt.

[0013] Preferably, a partition plate is provided on the inner wall of the raw material processing tank, and the partition plate separates the interior of the raw material processing tank into a plurality of independent processing chambers; the drying mechanism and the crushing mechanism are respectively located in their respective processing chambers; the raw material processing tank is also provided with a heat circulation component, and the heat circulation component is used to heat circulate the hot air in the processing chamber where the drying mechanism is located.

[0014] Preferably, the crushing mechanism is located below the drying mechanism, and the crushing mechanism includes a crusher arranged on the inner wall of the bottom of the raw material processing tank, and the top feed port of the crusher faces the discharge port of the bottom raw material conveyor belt; the discharge port of the crusher is connected to the feed port of the filling pipe.

[0015] The present application also provides an extraction method of a natural tea flavor extraction device, which uses the natural tea flavor extraction device described above and includes:

[0016] S1. Raw material cleaning: first place the lifting frame in the cleaning cylinder through the lifting cylinder and the lifting cover, and then put the tea raw materials into the cleaning cylinder from the loading channel on the top of the extraction axe; then pour water into the cleaning chamber until the tea raw materials are submerged; use the rotating motor to drive the cleaning cylinder and the lifting frame to rotate to achieve the cleaning of the tea raw materials; S2. Centrifugal dehydration: After cleaning, open the drain pipe to drain the water in the drainage interlayer, and then drive the cleaning cylinder and the lifting frame to rotate again through the lifting cylinder to centrifugally dehydrate the tea raw materials; S3. Drying process: The dehydrated tea raw materials are pumped to the drying mechanism through the feeding pipe, and the drying mechanism is used to dry the tea raw materials; S4. Crushing process: The dried tea raw materials fall from the discharge port of the drying mechanism into the crushing mechanism below, and the crushing mechanism is used to crush the tea raw materials;

[0017] S5. Automatic filling: The ground tea raw materials are pumped from the discharge port of the grinding mechanism to the extraction chamber through the filling pipe, and the tea raw materials are extracted in the extraction chamber.

[0018] In summary, this application includes at least one of the following beneficial technical effects:

[0019] 1. During the cleaning process, the rotating motor is started to drive the lifting frame and the cleaning drum to rotate synchronously. At this time, the tea leaves will float and swing in the clean water driven by the lifting frame and the cleaning drum, thereby further improving the cleaning effect and efficiency of the tea leaves.

[0020] 2. The motor drives the cleaning drum and the lifting frame to rotate, centrifugally dehydrate the cleaned tea leaves. This significantly reduces the overall weight of the lifting frame, speeds up the dehydration of the tea leaves, and increases the drying rate. During centrifugal dehydration, the lifting cover can be placed on top of the lifting frame to effectively reduce the chance of the tea leaves being thrown out of the cleaning drum during dehydration.

[0021] 3. Optimize the preparation process of tea raw materials, improve production efficiency, and reduce the loss of tea raw materials in the preparation process to ensure the later production of essence. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0023] Figure 2 yes Figure 1 Schematic diagram of the overall structure from another perspective;

[0024] Figure 3 This is a schematic diagram of the partial structural section of the extraction axe;

[0025] Figure 4 It is a partial structural diagram highlighting the raw material cleaning mechanism;

[0026] Figure 5 It is highlighted Figure 4 Schematic diagram of the local structure from the bottom perspective;

[0027] Figure 6 yes Figure 4 Schematic diagram of the local structure explosion;

[0028] Figure 7 It is a schematic cross-sectional view highlighting the local structure of the connector;

[0029] Figure 8 It is a schematic diagram highlighting the partial structure inside the raw material processing tank;

[0030] Figure 9 It is a schematic diagram of the local structure highlighting the drying mechanism and the crushing mechanism.

[0031] Explanation of Reference Numerals: 1. Processing platform; 2. Extraction axe; 20. Cleaning chamber; 200. Feeding channel; 21. Extraction chamber; 22. Discharge hopper; 23. Lifting cylinder; 24. Lifting cover; 240. Connector; 241. Locking spring; 242. Guide slope; 3. Raw material cleaning mechanism; 30. Cleaning cylinder; 31. Drain hole; 32. Rotating motor; 320. Scraper; 33. Driving rod; 34. Discharge chute; 35. Lifting frame; 350. First position limiting platform; 351. Second limit table; 352. Insertion slot; 353. First inclined surface; 354. Second inclined surface; 355. Blanking chute; 36. Sealing piece; 37. Drainage interlayer; 38. Drainage pipe; 39. Insert plate; 4. Raw material processing tank; 40. Partition plate; 41. Processing chamber; 42. Thermal cycle component; 5. Drying mechanism; 50. Bracket; 51. Raw material conveyor belt; 52. Heating component; 6. Crushing mechanism; 60. Crusher; 7. Feed pipeline; 8. Filling pipeline. DETAILED DESCRIPTION

[0032] The present application is further described in detail below with reference to the accompanying drawings.

[0033] The embodiment of the present application discloses a device for extracting natural tea essence.

[0034] Reference Figure 1 、 Figure 2 as well as Figure 3The extraction device for natural tea essence includes two sets of processing platforms 1 arranged side by side. A vertical extraction axe 2 is fixedly mounted on one set of processing platforms 1, and a horizontal raw material processing tank 4 is fixedly mounted on the other set of processing platforms 1. A funnel-shaped discharge hopper 22 is fixedly mounted on the inner side wall of the extraction axe 2. The discharge hopper 22 is coaxially arranged with the extraction axe 2. The discharge hopper 22 divides the interior of the extraction axe 2 into two independent and non-interconnected cleaning chambers 20 and extraction chambers 21. The cleaning chamber 20 is located above the extraction chamber 21. The extraction chamber 21 is used to extract the tea raw materials. A CO2 gas pipe is connected to the bottom of the extraction axe 2. The CO2 gas pipe is used to pump CO2 from the bottom of the extraction axe 2 into the extraction chamber 21.

[0035] like Figure 3 、 Figure 4 As shown, a raw material cleaning mechanism 3 is disposed within the cleaning chamber 20. This mechanism is used to clean the tea leaves. It includes a cleaning drum 30, which is rotatably mounted at its bottom within the cleaning chamber 20. The rotation axis of the cleaning drum 30 is coaxial with the central axis of the extraction axe 2. A large number of drainage holes 31 are formed along the vertically circumferential outer wall of the cleaning drum 30, arranged in a circular pattern. The cleaning mechanism 3 also includes a rotary motor 32 fixedly mounted on the top outer wall of the extraction axe 2. A drive rod 33, which extends into the cleaning chamber 20, is fixedly mounted on the output shaft of the rotary motor 32. The drive rod 33 is coaxial with the rotation axis of the cleaning drum 30, and its bottom is fixedly connected to the rotation axis of the cleaning drum 30. Upon activation of the rotary motor 32, the cleaning drum 30 is driven by the drive rod 33 to rotate within the cleaning chamber 20.

[0036] like Figure 2 、 Figure 3 as well as Figure 4 As shown, a drainage interlayer 37 is formed between the vertical circumferential outer wall of the cleaning cylinder 30 and the inner wall of the cleaning chamber 20. A drainage pipe 38 and a water inlet pipe are fixedly connected to the outer wall of the extraction axe 2, communicating with the drainage interlayer 37. The water inlet pipe is used to pump clean water into the drainage interlayer 37, which then flows into the cleaning cylinder 30 through the drainage holes 31. The drainage pipe 38 is used to pump wastewater from the drainage interlayer 37 and the cleaning cylinder 30 out of the extraction axe 2.

[0037] like Figure 2 、 Figure 3As shown, the discharge hopper 22 is located below the cleaning drum 30. A feed pipe 7 is connected between the bottom discharge port of the discharge hopper 22 and the feed port of the raw material processing tank 4. The feed pipe 7 is provided with a valve for controlling the opening and closing of the feed pipe 7. An open impeller centrifugal pump is fixedly installed outside the discharge port of the raw material processing tank 4. The discharge port of the feed pipe 7 is connected to the feed port of the open impeller centrifugal pump, and the discharge port of the open impeller centrifugal pump is connected to the top feed port of the raw material processing tank 4. By starting the open impeller centrifugal pump, the open impeller centrifugal pump can pump the tea material that has fallen into the discharge hopper 22 through the feed pipe 7 and into the raw material processing tank 4 from the top feed port.

[0038] like Figure 5 、 Figure 6 As shown, the bottom of the cleaning cylinder 30 is formed with a plurality of circumferentially arranged discharge grooves 34. A lifting frame 35 is provided within the cleaning cylinder 30 for elevation, coaxially arranged with the cleaning cylinder 30. A sealing member 36 is fixedly mounted at the bottom of the lifting frame 35, corresponding to each of the discharge grooves 34. The sealing member 36 is shaped to match the shape of the corresponding discharge groove 34. The sealing member 36 is inserted and fixedly secured within each of the corresponding discharge grooves 34 from top to bottom, thereby sealing the discharge groove 34.

[0039] like Figure 5 、 Figure 6 As shown, the bottom of the lifting frame 35 is penetrated by a plurality of circumferentially spaced troughs 355. The bottom of the cleaning cylinder 30 is fixedly provided with a plug-in plate 39 that matches the shape of each trough 355. Inserted into the trough 355, the plug-in plate 39 serves to seal the trough 355. Through the interlocking engagement of the plug-in plate 39 with the trough 355, and the interlocking engagement of the sealing member 36 with the discharge trough 34, the lifting frame 35 is fixed to the cleaning cylinder 30 and rotates synchronously with the cleaning cylinder 30. Since both the troughs 355 and the discharge trough 34 are blocked, clean water does not drain into the discharge hopper 22 below, achieving dry and wet separation between the cleaning cylinder 30 and the discharge hopper 22.

[0040] During the cleaning process of the tea leaves, the rotary motor 32 is started to drive the lifting frame 35 and the cleaning drum 30 to rotate synchronously. At this time, the tea leaves will float and swing in the clean water driven by the lifting frame 35 and the cleaning drum 30, thereby further improving the cleaning effect and efficiency of the tea leaves.

[0041] like Figure 5 、 Figure 6As shown, two symmetrically positioned lifting cylinders 23 are mounted on the top outer wall of the extraction axe 2. The piston rods of the lifting cylinders 23 extend into the cleaning chamber 20. A loading channel 200 is also fixed to the top of the extraction axe 2 for feeding tea material. The length of the loading channel 200 extends along the descending direction of the lifting cylinders 23 into the cleaning chamber 20. A common lifting cover 24 is fixedly mounted to the bottom of the piston rods of the two lifting cylinders 23. The lifting cover 24 is coaxially arranged with the lifting frame 35 and is movably mounted on the drive rod 33 and outside the loading channel 200. The lifting cylinders 23 are used to synchronously drive the lifting cover 24 up and down along the length of the drive rod 33.

[0042] like Figure 6 、 Figure 7 As shown, a first limiting platform 350 and a second limiting platform 351 are circumferentially arranged on the top outer wall of the lifting frame 35. The first limiting platform 350 and the second limiting platform 351 are coaxially arranged. The first limiting platform 350 is located above the second limiting platform 351, and the first limiting platform 350 and the second limiting platform 351 are arranged opposite each other.

[0043] like Figure 6 、 Figure 7 As shown, a first stop 350 is fixedly mounted on the top outer wall of the lifting frame 35, while a second stop 351 is slidably mounted on the outside of the lifting frame 35 along the lifting direction of the lifting cover 24. The second stop 351 separates from the first stop 350 under its own weight and is held at a specified height by a blocking member. An insertion slot 352 is formed between the separated first and second stop 350, 351. Multiple connectors 240 are arranged circumferentially and sequentially on the inner wall of the lifting cover 24 for synchronous insertion and removal from the insertion slots 352.

[0044] like Figure 6 、 Figure 7 As shown, the connector 240 is mounted on the lifting cover 24 so as to slide radially along the lifting cover 24. The lifting cover 24 is provided with a locking spring 241 that extends and contracts along the sliding direction of the respective opposite connector 240. One end of the locking spring 241 abuts against the inner sidewall of the lifting cover 24, while the other end of the locking spring 241 abuts against the respective opposite connector 240. The locking spring 241 is used to push the connector 240 into the insertion slot 352. When the connector 240 is inserted into the insertion slot 352, the connector 240 can rotate relative to the lifting frame 35.

[0045] like Figure 6 、 Figure 7As shown, a first inclined surface 353 is formed on the outer side wall of the first limiting platform 350 facing away from the second limiting platform 351. The first inclined surface 353 is inclined downwardly and away from the lifting frame 35. A second inclined surface 354 is formed on the outer side wall of the second limiting platform 351 facing away from the first limiting platform 350. The second inclined surface 354 is inclined upwardly and away from the lifting frame 35. A guide inclined surface 242 is provided on the side wall of the connector 240 facing the lifting frame 35.

[0046] When the connection between the lifting cover 24 and the lifting frame 35 needs to be established, the lifting cylinder 23 is activated to synchronously move the lifting cover 24 downward. The connector 240 will first contact the first inclined surface 353. Under the guidance of the first inclined surface 353 and the guide inclined surface 242, the first stop 350 will push the connector 240 to gradually compress the locking spring 241. After the connector 240 successfully passes the first stop 350, the connector 240 will return to its original position under the elastic force of the locking spring 241 and insert into the insertion slot 352. With the connector 240 and the insertion slot 352 interlocked, the lifting cover 24 and the lifting frame 35 are now connected. When the lifting cover 24 is lifted upward by the synchronous drive of the lifting cylinder 23, the connector 240 will drive the lifting frame 35 to rise synchronously.

[0047] Before raising the lifting frame 35, the drain pipe 38 is opened to drain the wastewater after cleaning. The rotary motor 32 then rotates the cleaning drum 30 and the lifting frame 35 to centrifugally dehydrate the cleaned tea leaves. This significantly reduces the overall weight of the lifting frame 35, accelerates the dehydration of the tea leaves, and improves the drying rate. During the centrifugal dehydration process, the lifting cover 24 can be placed on top of the lifting frame 35 to effectively reduce the probability of the tea leaves being thrown out of the cleaning drum 30 during dehydration.

[0048] To release the connection between the lifting cover 24 and the lifting frame 35, the lifting frame 35 is first repositioned on the washing tub 30. The connector 240 in the insertion slot 352 is then further lowered, guided by the inclined guide surface 242 to move the connector 240 out from below the insertion slot 352 until it abuts against the outer wall of the second inclined surface 354. The lifting cover 24 is then pushed downward until the connector 240 is below the bottom plane of the second stop 351. The lifting cover 24 is then lifted upward. The connector 240, restrained by the bottom plane of the second stop 351, simultaneously raises the second stop 351 until it abuts the first stop 350. As the lifting cover 24 rises further, the connector 240 disengages from the lifting frame 35 along the interlocking second inclined surface 354 and first inclined surface 353, releasing the connection between the lifting cover 24 and the lifting frame 35.

[0049] like Figure 6 、 Figure 7 As shown, a scraper plate 320 is coaxially fixed to the output shaft of the rotary motor 32, located below the lifting cover 24. The scraper plate 320 is located within the washing drum 30 and along the ascending path of the lifting frame 35. When the lifting cover 24 lifts the lifting frame 35 upward from the washing drum 30, the lifting frame 35 gradually approaches the scraper plate 320. The rotary motor 32 is then activated, driving the washing drum 30 and the scraper plate 320 to rotate synchronously. Centrifugal force is applied to the tea leaves on the washing drum 30, causing them to fall into the adjacent discharge chute 34 and ultimately into the discharge hopper 22 below. The tea leaves on the lifting frame 35, propelled by the scraper plate 320, fall into the adjacent drop chute 355 and ultimately into the discharge hopper 22 below.

[0050] To further improve the discharge efficiency of the cleaning drum 30, the lifting frame 35 can be raised to a specified height until the sealing member 36 contacts the upper surface of the bottom of the cleaning drum 30. As the cleaning drum 30 rotates, the sealing member 36 can also push the tea leaves from the cleaning drum 30 into the adjacent discharge chute 34. The fully automatic control and high degree of mechanization greatly improve the processing efficiency of the cleaning, dehydration and discharge steps.

[0051] like Figure 8 、 Figure 9 As shown, a horizontal partition plate 40 is fixedly mounted on the inner sidewall of the raw material processing tank 4. The partition plate 40 divides the interior of the raw material processing tank 4 into two independent processing chambers 41, one above the other. The upper processing chamber 41 houses a drying mechanism 5 for drying the tea leaves, while the lower processing chamber 41 houses a grinding mechanism 6 for grinding the dried tea leaves.

[0052] like Figure 8 、 Figure 9 As shown, the drying mechanism 5 includes a bracket 50 fixedly installed in the raw material processing tank 4, and two layers of raw material conveyor belts 51 driven by independent motors are rotatably arranged on the bracket 50. The conveying directions of the upper surfaces of the two layers of raw material conveyor belts 51 are opposite. The bracket 50 is also fixedly installed with heating components 52 respectively mounted above each layer of raw material conveyor belt 51. The heating components 52 can use electric heating tubes or resistance wires to generate heat, convert electrical energy into thermal energy, and dry the tea raw materials on the raw material conveyor belts 51 through heat transfer.

[0053] like Figure 1 、 Figure 8As shown, a heat circulation assembly 42 is also mounted on the raw material processing tank 4. The heat circulation assembly 42 includes multiple fans fixedly mounted on the raw material processing tank 4. The fans are used to circulate the hot air within the processing chamber 41 where the drying mechanism 5 is located. The fans drive the hot air to form a horizontal or vertical circulation, thereby ensuring a more uniform temperature distribution within the upper processing chamber 41, further improving the drying effect.

[0054] like Figure 8 、 Figure 9 As shown, the pulverizing mechanism 6 is located below the drying mechanism 5. The pulverizing mechanism 6 includes a pulverizer 60 placed on the inner side wall of the bottom of the raw material processing tank 4. The pulverizer 60 adopts a universal pulverizer commonly used on the market. Its working principle is to utilize the high-speed relative motion between the movable toothed disc and the fixed toothed disc to pulverize the pulverized material through the combined effects of tooth impact, friction, and mutual impact of the materials, and finally discharge it from the bottom discharge port of the pulverizer 60 through the screen. The top feed port of the pulverizer 60 faces the discharge port of the lower raw material conveyor belt 51. The bottom discharge port of the pulverizer 60 is connected to the extraction chamber 21 through a filling pipe 8. The filling pipe 8 is also provided with a valve and an open impeller centrifugal pump. The filling pipe 8 is used to pump the pulverized tea raw material powder into the extraction chamber 21, thereby realizing automatic filling of the tea raw material powder.

[0055] This embodiment also provides a method for extracting natural tea essence, using the above-mentioned natural tea essence extraction device, including: S1, raw material cleaning: first, the lifting cylinder 23 and the lifting cover 24 cooperate to place the lifting frame 35 in the cleaning cylinder 30, and then the tea raw materials are put into the cleaning cylinder 30 through the feeding channel 200 on the top of the extraction axe 2; then, water is poured into the cleaning chamber 20 until the tea raw materials are submerged; the rotary motor 32 drives the cleaning cylinder 30 and the lifting frame 35 to rotate, thereby cleaning the tea raw materials;

[0056] S2. Centrifugal Dehydration: After cleaning, the drain pipe 38 is opened to drain the water in the drainage interlayer 37. The cleaning drum 30 and the lifting frame 35 are then driven again by the lifting cylinder 23 to rotate, thereby centrifugally dehydrating the tea leaves. S3. Drying: The dehydrated tea leaves are pumped through the feed pipe 7 to the drying mechanism 5, where they are dried. S4. Pulverization: The dried tea leaves fall from the discharge port of the drying mechanism 5 into the pulverizing mechanism 6 below, where they are pulverized.

[0057] S5, automatic filling, the ground tea material is pumped from the discharge port of the grinding mechanism 6 into the extraction chamber 21 through the filling pipe 8, and the tea material is extracted in the extraction chamber 21.

[0058] The implementation principle is: during the cleaning of the tea raw materials, the rotary motor 32 is started to drive the lifting frame 35 and the cleaning cylinder 30 to rotate synchronously. At this time, the tea raw materials will float and swing in the clean water under the drive of the lifting frame 35 and the cleaning cylinder 30, thereby further improving the cleaning effect and efficiency of the tea raw materials.

[0059] Before raising the lifting frame 35, the drain pipe 38 is opened to drain the wastewater after cleaning. The rotary motor 32 then rotates the cleaning drum 30 and the lifting frame 35 to centrifugally dehydrate the cleaned tea leaves. This significantly reduces the overall weight of the lifting frame 35, accelerates the dehydration of the tea leaves, and improves the drying rate. During the centrifugal dehydration process, the lifting cover 24 can be placed on top of the lifting frame 35 to effectively reduce the probability of the tea leaves being thrown out of the cleaning drum 30 during dehydration.

[0060] When the lifting cover 24 lifts the lifting frame 35 upward from the washing cylinder 30, the lifting frame 35 gradually approaches the scraper plate 320 above. Then, the rotary motor 32 is started to drive the washing cylinder 30 and the scraper plate 320 to rotate synchronously. At this time, the tea leaves on the washing cylinder 30 are thrown into the adjacent discharge chute 34 under the action of centrifugal force, and finally fall into the discharge hopper 22 below. The tea leaves on the lifting frame 35 are pushed by the scraper plate 320 to fall into the adjacent drop chute 355, and finally fall smoothly into the discharge hopper 22 below.

[0061] Optimize the preparation process of tea raw materials, improve production efficiency, and reduce the loss of tea raw materials in the preparation process to ensure the later production of essence.

[0062] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A device for extracting natural tea essence, comprising a processing platform (1), wherein an extraction axe (2) is provided on the processing platform (1); characterized in that: The extraction axe (2) is provided with a cleaning chamber (20) and an extraction chamber (21) which are independent of each other, and the cleaning chamber (20) is located above the extraction chamber (21); a raw material cleaning mechanism (3) is provided in the cleaning chamber (20), and the raw material cleaning mechanism (3) is used to clean the tea raw materials; the processing platform (1) is also provided with a raw material processing tank (4) located outside the extraction axe (2), and the raw material processing tank (4) is provided with a drying mechanism (5) and a crushing mechanism (6); a feeding pipe (7) is provided between the extraction axe (2) and the raw material processing tank (4), the feeding port of the feeding pipe (7) is communicated with the cleaning chamber (20), and the discharging port of the feeding pipe (7) is used to pump the cleaned tea raw materials to the drying mechanism (5); the discharging port of the drying mechanism (5) is used to feed the dried tea raw materials into the crushing mechanism (6) for crushing; a filling pipe (8) is provided between the discharging port of the crushing mechanism (6) and the extraction chamber (21); The raw material cleaning mechanism (3) includes a cleaning cylinder (30) rotatably arranged in the cleaning chamber (20), and a drainage hole (31) is passed through the circumferential outer wall of the cleaning cylinder (30); the raw material cleaning mechanism (3) also includes a rotating motor (32) installed on the outer wall of the top of the extraction axe (2), and a driving rod (33) coaxial with the rotating shaft of the cleaning cylinder (30) is provided on the output shaft of the rotating motor (32), and the driving rod (33) is fixedly connected to the rotating shaft of the cleaning cylinder (30); a plurality of discharge grooves (34) are passed through the bottom of the cleaning cylinder (30), and a discharge hopper (22) located below the cleaning cylinder (30) is provided on the inner wall of the extraction axe (2), and the discharge hopper (22) is used to separate the cleaning chamber (20) and the extraction chamber (21) from each other; the feed port of the feed pipe (7) is connected to the discharge port at the bottom of the discharge hopper (22); A lifting frame (35) is provided in the cleaning cylinder (30) for lifting, and a blocking piece (36) is provided at the bottom of the lifting frame (35) and is opposite to the discharge groove (34). The shape of the blocking piece (36) is adapted to the shape of the corresponding discharge groove (34). The blocking piece (36) is used to be respectively inserted and fixed in the discharge groove (34) and to block the discharge groove (34). A drainage interlayer (37) is formed between the circumferential outer wall of the cleaning cylinder (30) and the inner wall of the cleaning chamber (20). A drainage pipe (38) connected to the drainage interlayer (37) is provided on the outer wall of the extraction axe (2). The lifting frame (35) is provided with a plurality of blanking troughs (355), and the bottom of the cleaning cylinder (30) is provided with an inserting plate (39) adapted to the shape of each blanking trough (355). The inserting plate (39) inserted into the blanking trough (355) is used to seal the blanking trough (355).

2. The extraction device for natural tea essence according to claim 1, characterized in that: A lifting cylinder (23) is provided on the outer side wall of the top of the extraction axe (2), and the piston rod of the lifting cylinder (23) extends into the cleaning chamber (20); a feeding channel (200) is provided on the top of the extraction axe (2), and the bottom of the feeding channel (200) extends into the cleaning chamber (20); a lifting cover (24) is provided on the piston rod of the lifting cylinder (23), and the lifting cover (24) is movably provided on the outside of the driving rod (33) and the feeding channel (200); a first limiting platform (350) and a second limiting platform (351) are circumferentially provided on the outer side wall of the top of the lifting frame (35), and the first limiting platform (350) and the second limiting platform (351) are circumferentially provided. (351) are coaxially arranged, and the first limit platform (350) is located above the second limit platform (351); the first limit platform (350) is fixedly arranged on the top of the lifting frame (35), and the second limit platform (351) is slidably sleeved on the outside of the lifting frame (35) along the lifting direction of the lifting cover (24); a plug-in slot (352) is formed between the first limit platform (350) and the second limit platform (351), and a plurality of connectors (240) for synchronously inserting into or withdrawing from the plug-in slot (352) are circumferentially arranged on the lifting cover (24), and the connector (240) inserted into the plug-in slot (352) will rotate relative to the lifting frame (35).

3. The extraction device for natural tea essence according to claim 2, characterized in that: A scraper plate (320) located below the lifting cover (24) is coaxially fixedly provided on the output shaft of the rotary motor (32). The scraper plate (320) is located in the cleaning cylinder (30) and on the ascending path of the lifting frame (35).

4. The device for extracting natural tea essence according to claim 3, characterized in that: The drying mechanism (5) includes a bracket (50) fixedly mounted in the raw material processing tank (4), a plurality of raw material conveyor belts (51) being rotatably mounted on the bracket (50), and a heating assembly (52) mounted above each layer of the raw material conveyor belt (51) being further mounted on the bracket (50).

5. The device for extracting natural tea essence according to claim 4, characterized in that: A partition plate (40) is provided on the inner side wall of the raw material processing tank (4), and the partition plate (40) divides the interior of the raw material processing tank (4) into a plurality of mutually independent processing chambers (41); the drying mechanism (5) and the crushing mechanism (6) are respectively located in their respective processing chambers (41); and a heat circulation component (42) is further provided on the raw material processing tank (4), and the heat circulation component (42) is used to heat circulate the hot air in the processing chamber (41) where the drying mechanism (5) is located.

6. The device for extracting natural tea essence according to claim 5, characterized in that: The pulverizing mechanism (6) is located below the drying mechanism (5), and includes a pulverizer (60) arranged on the inner side wall of the bottom of the raw material processing tank (4). The top feed port of the pulverizer (60) faces the discharge port of the bottom raw material conveyor belt (51); the discharge port of the pulverizer (60) is connected to the feed port of the filling pipe (8).

7. A method for extracting natural tea essence, using the natural tea essence extraction device according to claim 6, characterized in that: S1. Raw material cleaning: first, the lifting frame (35) is placed in the cleaning cylinder (30) by cooperating with the lifting cylinder (23) and the lifting cover (24), and then the tea raw materials are put into the cleaning cylinder (30) from the feeding channel (200) on the top of the extraction axe (2); then, water is poured into the cleaning chamber (20) until the tea raw materials are submerged; the cleaning cylinder (30) and the lifting frame (35) are driven to rotate by the rotary motor (32), so that the tea raw materials are cleaned; S2, centrifugal dehydration: After cleaning, the drain pipe (38) is opened to drain the water in the drainage interlayer (37), and then the cleaning cylinder (30) and the lifting frame (35) are driven to rotate again by the lifting cylinder (23) to centrifugally dehydrate the tea raw materials; S3, drying process: the tea leaves after dehydration are pumped to the drying mechanism (5) through the feeding pipe (7), and the tea leaves are dried by the drying mechanism (5); S4, pulverization: the dried tea leaves fall from the discharge port of the drying mechanism (5) into the pulverization mechanism (6) below, and the pulverization mechanism (6) pulverizes the tea leaves; S5, automatic filling, the crushed tea raw materials are pumped from the discharge port of the crushing mechanism (6) into the extraction chamber (21) through the filling pipe (8), and the tea raw materials are extracted in the extraction chamber (21).

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