Device and method for extracting natural tea essence

Abstract

The invention relates to an extraction device and method for natural tea essence. The extraction device comprises a processing platform, and an extraction kettle is arranged on the processing platform; a cleaning cavity and an extraction cavity which are mutually independent are formed in the extraction kettle, a raw material cleaning mechanism is arranged in the cleaning cavity, a raw material treatment tank located outside the extraction kettle is further arranged on the processing platform, and a drying mechanism and a smashing mechanism are arranged in the raw material treatment tank; a material conveying pipeline is arranged between the extraction kettle and the raw material treatment tank, and a discharging opening of the material conveying pipeline is used for pumping the cleaned tea raw materials to the drying mechanism; a discharge port of the drying mechanism is used for feeding the dried tea leaf raw materials into the crushing mechanism for crushing; and a filling pipeline is arranged between the discharge hole of the crushing mechanism and the extraction cavity. The preparation method has the effects of optimizing the preparation link of the tea raw materials, improving the production efficiency and reducing the loss of the tea raw materials in the preparation link so as to ensure the later essence yield.

Description

Technical Field

[0001] The present application relates to the technical field of flavor extraction devices, and particularly to an extraction device and method for natural tea flavors. Background Art

[0002] Currently, the supercritical CO2 extraction method is commonly used in 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 as follows: in the supercritical state, CO2 becomes a single phase state with properties between liquids and gases, having a density close to that of a liquid, a viscosity higher than that of a gas but significantly lower than that of a liquid, and a diffusion coefficient 100 times that of a liquid; the migration or distribution of chemical substances in it is faster than in liquid solvents, and the solubility increases with the increase in density; by appropriately changing the temperature or pressure, the solubility can vary within a large range, which is beneficial to separately extract components with different solubilities from substances, accelerate the dissolution equilibrium, and improve the extraction efficiency.

[0003] The process of the supercritical CO2 extraction process mainly includes: preparing raw materials, selecting fresh and washed tea leaves as raw materials, ensuring the tea leaves are clean, and chopping or grinding them into appropriate particle sizes 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; system pressurization and temperature increase, starting the equipment, injecting liquid CO2 into the system, and gradually increasing the pressure and temperature above the supercritical point (usually the pressure is above 7.38 MPa and the temperature exceeds 31.1 °C), this step makes CO2 enter the supercritical state, having the diffusivity of a gas and the dissolution ability of a liquid; starting the extraction process, when the system reaches the set pressure and temperature, start circulating supercritical CO2 through the tea material, during which the aroma components and other soluble substances in the tea leaves will dissolve in the supercritical CO2. Separating the product, the supercritical CO2 containing the extracted components will be guided to the separator, where the CO2 is returned to the gaseous state and the tea flavor components carried by it are released by means of pressure reduction, temperature reduction, etc.

[0004] After the tea raw materials are washed, they also need to be dried to control the moisture content. As a polar substance, water will compete with supercritical CO2 (a non-polar solvent) to bind to the target components, reducing the extraction efficiency of fat-soluble substances (such as tea polyphenols and theaflavins). Therefore, during the process of preparing raw materials, it is necessary to manually transfer the tea leaves between different devices multiple times, which is time-consuming and laborious, and reduces the production efficiency to a certain extent. In addition, during the transfer process, it is easy to cause losses of tea raw materials, thus reducing the yield. Summary of the Invention

[0005] The present application provides an extraction device and method for natural tea essence, 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 later production of essence.

[0006] The extraction device for natural tea essence provided by the present application adopts the following technical solutions: An extraction device for natural tea essence includes a processing platform, and an extraction axe is arranged on the processing platform; an independent cleaning chamber and an extraction chamber are arranged in the extraction axe, and the cleaning chamber is located above the extraction chamber; a raw material cleaning mechanism is arranged in the cleaning chamber, and the raw material cleaning mechanism is used for cleaning tea raw materials; a raw material treatment tank located outside the extraction axe is also arranged on the processing platform, and a drying mechanism and a crushing mechanism are arranged in the raw material treatment tank; a feeding pipeline is arranged between the extraction axe and the raw material treatment tank, the feeding port of the feeding pipeline is communicated with the cleaning chamber, and the discharging port of the feeding pipeline is used for pumping the cleaned tea raw materials to the drying mechanism; the discharging port of the drying mechanism is used for sending the dried tea raw materials into the crushing mechanism for crushing; a filling pipeline is arranged between the discharging port of the crushing mechanism and the extraction chamber.

[0007] Preferably, the raw material cleaning mechanism includes a cleaning cylinder rotatably arranged in the cleaning chamber, and drain holes are formed through the circumferential outer side wall of the cleaning cylinder; the raw material cleaning mechanism further includes a rotating motor installed on the outer side wall of the top of the extraction axe, a driving rod coaxial with the rotating shaft of the cleaning cylinder is arranged on the output shaft of the rotating motor, and the driving rod is fixedly connected with the rotating shaft of the cleaning cylinder; a plurality of discharge grooves are formed through the bottom of the cleaning cylinder, and a discharge hopper located below the cleaning cylinder is arranged on the inner side wall of the extraction axe, and the discharge hopper is used for separating the cleaning chamber from the extraction chamber; the feeding port of the feeding pipeline is communicated with the discharge port at the bottom of the discharge hopper.

[0008] Preferably, a lifting frame is arranged in the cleaning cylinder in a lifting manner, a blocking member corresponding to each discharge groove is arranged at the bottom of the lifting frame, and the shape of the blocking member is adapted to the shape of the corresponding discharge groove; the blocking member is used for being respectively inserted and fixed in the discharge groove to block the discharge groove; a drainage interlayer is formed between the circumferential outer side wall of the cleaning cylinder and the inner side wall of the cleaning chamber, and a drain pipe communicated with the drainage interlayer is arranged on the outer side wall of the extraction axe.

[0009] Preferably, a lifting cylinder is provided on the outer side wall of the top of the extraction axe, and the piston rod of the lifting cylinder extends into the cleaning chamber; a feeding channel is provided at the top of the extraction axe, and the bottom of the feeding channel extends into the cleaning chamber; a lifting cover is provided on the piston rod of the lifting cylinder, and the lifting cover movably penetrates outside the driving rod and the feeding channel; a first limiting platform and a second limiting platform are circumferentially arranged around the outer side wall of the top of the lifting frame, the first limiting platform and the second limiting platform are coaxially arranged, and the first limiting platform is located above the second limiting platform; the first limiting platform is fixedly arranged on the top of the lifting frame, and the second limiting platform is slidably sleeved outside the lifting frame along the lifting direction of the lifting cover; a plugging groove is formed between the first limiting platform and the second limiting platform, and a plurality of plugging members for synchronously inserting into or withdrawing from the plugging groove are circumferentially arranged on the lifting cover, and the plugging members inserted into the plugging groove will rotate relative to the lifting frame.

[0010] Preferably, a plurality of blanking grooves are penetrated on the lifting frame, and a plug board adapted to the shape of each blanking groove is arranged at the bottom of the cleaning cylinder, and the plug board inserted into the blanking groove is used for plugging the blanking groove; a scraping plate located below the lifting cover is coaxially and fixedly arranged on the output shaft of the rotating motor, the scraping plate is located in the cleaning cylinder, and the scraping plate is located on the ascending path of the lifting frame.

[0011] Preferably, the drying mechanism includes a bracket fixedly installed in the raw material processing tank, a plurality of layers of raw material conveyor belts are rotatably arranged on the bracket, and heating components are also arranged on the bracket above each layer of raw material conveyor belt.

[0012] Preferably, a partition plate is arranged on the inner side wall of the raw material processing tank, and the partition plate divides 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; a heat circulation component is also arranged on the raw material processing tank, and the heat circulation component is used for heat circulation of the hot air in the processing chamber where the drying mechanism is located.

[0013] Preferably, the crushing mechanism is located below the drying mechanism, and the crushing mechanism includes a crusher arranged on the inner side wall of the bottom of the raw material processing tank, and the top feed inlet of the crusher faces the discharge outlet of the bottom layer of the raw material conveyor belt; the discharge outlet of the crusher is communicated with the feed inlet of the filling pipeline.

[0014] The present application also provides an extraction method for an extraction device of tea natural essence, adopting the above extraction device of tea natural essence, including: S1. Raw material cleaning: First, place the lifting frame in the cleaning cylinder by cooperating the lifting cylinder with the lifting cover, and then put the tea raw materials into the cleaning cylinder through the feeding channel at the top of the extraction axe; then inject water into the cleaning cavity until the tea raw materials are submerged; drive the cleaning cylinder and the lifting frame to rotate through the rotating motor to clean the tea raw materials. S2. Centrifugal dehydration: After cleaning, open the drain pipe to drain the water in the drainage sandwich layer, 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 treatment: Pump the dehydrated tea raw materials to the drying mechanism through the feeding pipeline, and dry the tea raw materials through the drying mechanism. S4. Crushing treatment: The dried tea raw materials fall from the discharge port of the drying mechanism into the lower crushing mechanism below, and the tea raw materials are crushed through the crushing mechanism. S5. Automatic filling: The crushed tea raw materials are pumped from the discharge port of the crushing mechanism to the extraction cavity through the filling pipeline, and the tea raw materials are extracted in the extraction cavity.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: 1. During the cleaning of the tea raw materials, by starting the rotating motor to drive the lifting frame and the cleaning cylinder to rotate synchronously, at this time, the tea raw materials will float and swing in the clear water driven by the lifting frame and the cleaning cylinder, so as to further improve the cleaning effect and efficiency of the tea raw materials. 2. Drive the cleaning cylinder and the lifting frame to rotate through the rotating motor to centrifugally dehydrate the tea raw materials after cleaning, so as to greatly reduce the overall weight of the lifting frame, and at the same time can also accelerate the dehydration of the tea raw materials and improve the drying rate. During centrifugal dehydration, the lifting cover can be blocked at the top of the lifting frame, so as to effectively reduce the probability of the tea raw materials being thrown out of the cleaning cylinder during dehydration. 3. Optimize the preparation process of the tea raw materials, improve the production efficiency, reduce the loss of the tea raw materials in the preparation process, and ensure the later production of essence. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the overall structural schematic diagram of the embodiment of the present application; Figure 2 is Figure 1 the overall structural schematic diagram from another perspective; Figure 3 is the partial structural sectional view of the extraction axe; Figure 4 is the partial structural schematic diagram highlighting the raw material cleaning mechanism; Figure 5 is highlighting Figure 4 the partial structural schematic diagram from the bottom perspective; Figure 6 is Figure 4Explosion schematic diagram of the local structure; Figure 7 Is a schematic cross-sectional view of the local structure highlighting the connector; Figure 8 Is a schematic diagram of the local structure highlighting the inside of the raw material treatment tank; Figure 9 Is a schematic diagram of the local structure highlighting the drying mechanism and the crushing mechanism.

[0017] 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, guiding inclined surface; 3, raw material cleaning mechanism; 30, cleaning cylinder; 31, drain hole; 32, rotating motor; 320, scraping plate; 33, driving rod; 34, discharge chute; 35, lifting frame; 350, first limiting platform; 351, second limiting platform; 352, insertion slot; 353, first inclined surface; 354, second inclined surface; 355, blanking chute; 36, plugging member; 37, drainage interlayer; 38, drain pipe; 39, insertion plate; 4, raw material treatment tank; 40, partition plate; 41, processing chamber; 42, thermal circulation assembly; 5, drying mechanism; 50, bracket; 51, raw material conveyor belt; 52, heating assembly; 6, crushing mechanism; 60, crusher; 7, feeding pipeline; 8, filling pipeline. Detailed implementation manners

[0018] The following further elaborates on the present application in conjunction with the accompanying drawings.

[0019] The embodiment of the present application discloses an extraction device for natural tea essence.

[0020] Referring to Figure 1 , Figure 2 and Figure 3 , the extraction device for natural tea essence includes two sets of processing platforms 1 arranged side by side. A vertically arranged extraction axe 2 is fixedly installed on one set of processing platforms 1, and a horizontal raw material treatment tank 4 is fixedly installed on the other set of processing platforms 1. A funnel-shaped discharge hopper 22 is fixedly installed 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 mutually independent and non-communicating cleaning chamber 20 and extraction chamber 21 up and down. The cleaning chamber 20 is located above the extraction chamber 21. The extraction chamber 21 is used for extracting tea raw materials. The bottom of the extraction axe 2 is connected to a CO2 gas pipeline, and the CO2 gas pipeline is used to pump CO2 from the bottom of the extraction axe 2 into the extraction chamber 21.

[0021] As Figure 3 , Figure 4As shown, a raw material cleaning mechanism 3 is arranged in the cleaning chamber 20. The raw material cleaning mechanism 3 is used to clean the tea raw materials. The raw material cleaning mechanism 3 includes a cleaning cylinder 30 rotatably arranged at the bottom in the cleaning chamber 20. The rotating shaft of the cleaning cylinder 30 is coaxially arranged with the central axis of the extraction axe 2. A large number of drain holes 31 are arranged at intervals in a ring shape on the circumferential outer wall of the cleaning cylinder 30 along the vertical direction. The raw material cleaning mechanism 3 further includes a rotary motor 32 fixedly installed on the outer wall of the top of the extraction axe 2. A driving rod 33 extending into the cleaning chamber 20 is fixedly installed on the output shaft of the rotary motor 32. The driving rod 33 is coaxially arranged with the rotating shaft of the cleaning cylinder 30, and the bottom of the driving rod 33 is fixedly connected to the rotating shaft of the cleaning cylinder 30. By starting the rotary motor 32, the cleaning cylinder 30 will rotate in the cleaning chamber 20 under the drive of the driving rod 33.

[0022] As Figure 2 、 Figure 3 and Figure 4 shown, a drainage sandwich layer 37 is formed between the circumferential outer wall of the cleaning cylinder 30 along the vertical direction and the inner wall of the cleaning chamber 20. A drain pipe 38 and a water inlet pipe communicated with the drainage sandwich layer 37 are fixedly connected to the outer wall of the extraction axe 2. The water inlet pipe is used to pump clear water into the drainage sandwich layer 37, and the clear water will flow into the cleaning cylinder 30 through the drain holes 31. The drain pipe 38 is used to pump the sewage in the drainage sandwich layer 37 and the cleaning cylinder 30 out of the extraction axe 2.

[0023] As Figure 2 、 Figure 3 shown, the discharge hopper 22 is located below the cleaning cylinder 30. A feeding pipeline 7 is communicated between the bottom discharge port of the discharge hopper 22 and the feeding port of the raw material processing tank 4. A valve for controlling the opening and closing of the feeding pipeline 7 is arranged on the feeding pipeline 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 feeding pipeline 7 is communicated with the feeding port of the open impeller centrifugal pump, and the discharge port of the open impeller centrifugal pump is communicated with the top feeding port of the raw material processing tank 4. By starting the open impeller centrifugal pump, the open impeller centrifugal pump can pump the tea raw materials falling into the discharge hopper 22 into the raw material processing tank 4 through the feeding pipeline 7 from the top feeding port of the raw material processing tank 4.

[0024] As Figure 5 、 Figure 6 shown, a plurality of discharge grooves 34 are arranged in a circumferential ring shape at the bottom of the cleaning cylinder 30. A lifting frame 35 is arranged in the cleaning cylinder 30 in a lifting manner. The lifting frame 35 is coaxially arranged with the cleaning cylinder 30. A blocking member 36 corresponding to each discharge groove 34 is fixedly arranged at the bottom of the lifting frame 35. The shape of the blocking member 36 is adapted to the shape of the corresponding discharge groove 34. The blocking member 36 is used to be inserted and fixed into the corresponding discharge groove 34 from top to bottom respectively, and block the discharge groove 34.

[0025] As Figure 5 、 Figure 6 shown, a plurality of blanking grooves 355 that are circumferentially arranged at intervals in sequence penetrate through the bottom of the lifting frame 35. A plug board 39 that is adapted to the shape of each blanking groove 355 is fixedly arranged at the bottom of the cleaning cylinder 30. The plug board 39 inserted into the blanking groove 355 is used to block the blanking groove 355 respectively. Through the mutual plug-in and matching of the plug board 39 and the blanking groove 355, and the mutual plug-in and matching of the blocking member 36 and the discharge groove 34, at this time, the lifting frame 35 will be limited and fixed on the cleaning cylinder 30, and the lifting frame 35 will rotate synchronously with the cleaning cylinder 30. Since both the blanking groove 355 and the blanking groove 355 are blocked, clear water will not be discharged into the lower discharge hopper 22, realizing the dry-wet separation of the cleaning cylinder 30 and the discharge hopper 22.

[0026] During the cleaning of the tea raw materials, by starting the rotating motor 32 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 clear water under the drive of the lifting frame 35 and the cleaning cylinder 30, so as to further improve the cleaning effect and cleaning efficiency of the tea raw materials.

[0027] As Figure 5 、 Figure 6 shown, two lifting cylinders 23 that are symmetrically arranged are provided on the outer side wall of the top of the extraction axe 2. The piston rod of the lifting cylinder 23 extends into the cleaning cavity 20. A feeding channel 200 for feeding tea raw materials is also fixedly arranged on the top of the extraction axe 2. The length of the feeding channel 200 extends into the cleaning cavity 20 along the descending direction of the piston rod of the lifting cylinder 23. The bottoms of the piston rods of the two lifting cylinders 23 are fixedly installed with the same lifting cover 24. The lifting cover 24 and the lifting frame 35 are coaxially arranged, and the lifting cover 24 movably penetrates outside the driving rod 33 and the feeding channel 200. The lifting cylinder 23 is used to drive the lifting cover 24 to lift along the length direction of the driving rod 33 synchronously.

[0028] As Figure 6 、 Figure 7 shown, a first limiting platform 350 and a second limiting platform 351 are circumferentially arranged around the outer side wall of the top 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 oppositely arranged.

[0029] As Figure 6 、 Figure 7As shown, the first limiting platform 350 is fixedly arranged on the outer side wall of the top of the lifting frame 35, and the second limiting platform 351 is slidably sleeved outside the lifting frame 35 along the lifting direction of the lifting cover 24. Under the action of its own gravity, the second limiting platform 351 is separated from the first limiting platform 350, and is limited at a specified height under the blocking of the blocking member. An insertion slot 352 is formed between the mutually separated first limiting platform 350 and the second limiting platform 351. A plurality of insertion members 240 for synchronously inserting into or withdrawing from the insertion slot 352 are circumferentially and sequentially arranged at intervals on the inner side wall of the lifting cover 24.

[0030] As Figure 6 , Figure 7 shown, the insertion member 240 is slidably arranged on the lifting cover 24 along the radial direction of the lifting cover 24. A locking spring 241 that expands and contracts along the sliding direction of the respective opposite insertion members 240 is arranged on the lifting cover 24. One end of the locking spring 241 abuts against the inner side wall of the lifting cover 24, and the other end of the locking spring 241 abuts against the respective opposite insertion members 240. The locking spring 241 is used to push the insertion member 240 into the insertion slot 352. When the insertion member 240 is inserted into the insertion slot 352, the insertion member 240 can rotate relative to the lifting frame 35 at this time.

[0031] As Figure 6 , Figure 7 shown, a first inclined surface 353 is formed on the outer side wall of the edge of the first limiting platform 350 facing away from the second limiting platform 351. The first inclined surface 353 is inclined obliquely downward in a direction away from the lifting frame 35. A second inclined surface 354 is formed on the outer side wall of the edge of the second limiting platform 351 facing away from the first limiting platform 350. The second inclined surface 354 is inclined obliquely upward in a direction away from the lifting frame 35. A guiding inclined surface 242 is arranged on the side wall of the insertion member 240 facing the lifting frame 35.

[0032] When it is necessary to establish the connection between the lifting cover 24 and the lifting frame 35, the lifting cover 24 is synchronously lowered by starting the lifting cylinder 23. The insertion member 240 will first contact the first inclined surface 353. Under the common guidance of the first inclined surface 353 and the guiding inclined surface 242, the first limiting platform 350 will push the insertion member 240 to gradually compress the locking spring 241. When the insertion member 240 successfully crosses the first limiting platform 350, the insertion member 240 will reset under the elastic force of the locking spring 241 and insert into the insertion slot 352. Through the mutual insertion of the insertion member 240 and the insertion slot 352, the lifting cover 24 and the lifting frame 35 can be connected to each other at this time. When the lifting cover 24 is lifted upward synchronously driven by the lifting cylinder 23, the insertion member 240 can drive the lifting frame 35 to rise synchronously.

[0033] Before lifting the lifting frame 35, the drain pipe 38 is opened to extract the sewage after cleaning, and then the washing cylinder 30 and the lifting frame 35 are driven by the rotating motor 32 to rotate, so as to centrifugally dehydrate the tea leaves after cleaning, thereby greatly reducing the overall weight of the lifting frame 35, and also speeding up the dehydration of the tea leaves and improving the drying rate. During the centrifugal dehydration, the lifting cover 24 can be blocked at the top of the lifting frame 35, thereby effectively reducing the probability of the tea leaves being thrown out of the washing cylinder 30 during the dehydration.

[0034] When the connection between the lifting cover 24 and the lifting frame 35 needs to be released, the lifting frame 35 is first placed back on the cleaning cylinder 30, and then the connector 240 in the plug-in slot 352 is further moved downward, and the connector 240 is moved out from the bottom of the plug-in slot 352 by means of the guide inclined surface 242 until it contacts the outer wall of the second inclined surface 354. Then the lifting cover 24 is pushed downward until the connector 240 is moved below the bottom plane of the second limiting platform 351. Then the lifting cover 24 is lifted upward again, and at this time, the connector 240 will drive the second limiting platform 351 to rise synchronously under the limit of the bottom plane of the second limiting platform 351, until the second limiting platform 351 and the first limiting platform 350 are in contact with each other. As the lifting cover 24 rises further, the connector 240 will be separated from the lifting frame 35 along the second inclined surface 354 and the first inclined surface 353 that are engaged with each other, and at this time, the connection between the lifting cover 24 and the lifting frame 35 is released.

[0035] like Figure 6 , Figure 7 As shown, a scraper plate 320 located below the lifting cover 24 is coaxially fixedly arranged on the output shaft of the rotating motor 32, and the scraper plate 320 is located in the cleaning cylinder 30, and the scraper plate 320 is located on the ascending path of the lifting frame 35. When the lifting cover 24 takes the lifting frame 35 upward from the cleaning cylinder 30, the lifting frame 35 will gradually approach the scraper plate 320 above, and then the rotating motor 32 is started to drive the cleaning cylinder 30 and the scraper plate 320 to rotate synchronously. At this time, the tea leaves on the cleaning cylinder 30 will be thrown into the adjacent discharge trough 34 under the action of centrifugal force, and finally fall into the lower discharge hopper 22. The tea leaves on the lifting frame 35 will fall into the adjacent drop trough 355 under the push of the scraper plate 320, and will eventually fall smoothly into the lower discharge hopper 22.

[0036] In order to further improve the discharge effect of the cleaning cylinder 30, the lifting frame 35 can be lifted to a specified height until the blocking member 36 contacts the upper surface of the bottom of the cleaning cylinder 30. As the cleaning cylinder 30 rotates, the blocking member 36 can also push the tea material from the cleaning cylinder 30 to the adjacent discharge trough 34. The fully automatic control is adopted with a high degree of mechanization, which greatly improves the processing efficiency of multiple links of cleaning, dehydration and discharge.

[0037] likeFigure 8 , Figure 9 As shown in Figure 9 , a horizontally arranged partition plate 40 is fixedly installed on the inner side wall 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, upper and lower. A drying mechanism 5 for drying tea raw materials is arranged in the upper processing chamber 41, and a pulverizing mechanism 6 for pulverizing the dried tea raw materials is arranged in the lower processing chamber 41.

[0038] As Figure 8 , Figure 9 shown in Figure 9 , the drying mechanism 5 includes a bracket 50 fixedly installed in the raw material processing tank 4. 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. Heating components 52 are also fixedly installed on the bracket 50 and are respectively arranged above each layer of raw material conveyor belt 51. The heating components 52 can use electric heating tubes or resistance wires to generate heat by energization, convert electrical energy into heat energy, and dry the tea raw materials on the raw material conveyor belt 51 through heat transfer.

[0039] As Figure 1 , Figure 8 shown in Figure 8 , a heat circulation component 42 is also installed on the raw material processing tank 4. The heat circulation component 42 includes a plurality of blowers fixedly installed on the raw material processing tank 4. The blowers are used to perform heat circulation on the hot air in the processing chamber 41 where the drying mechanism 5 is located. By driving the hot air to form a horizontal or vertical circulation by the blowers, the temperature distribution in the upper processing chamber 41 can be ensured to be more uniform, and the drying effect is further improved.

[0040] As Figure 8 , Figure 9 shown in Figure 9 , 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 uses a commonly used universal pulverizer on the market. Its working principle is to utilize the high-speed relative movement between the movable tooth disc and the fixed tooth disc, so that the material to be pulverized is pulverized through the comprehensive actions of tooth impact, friction, and impact between materials, and finally discharged from the bottom discharge port of the pulverizer 60 through a sieve mesh. The top feed port of the pulverizer 60 faces the discharge port of the lower layer of the raw material conveyor belt 51. The bottom discharge port of the pulverizer 60 is connected to the extraction chamber 21 through a filling pipeline 8. A valve and an open impeller centrifugal pump are also arranged on the filling pipeline 8. The filling pipeline 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.

[0041] This embodiment also provides a method for extracting natural tea essence, using the above-mentioned extraction device for natural tea essence, including: S1. Raw material cleaning: First, place the lifting frame 35 in the cleaning cylinder 30 by the cooperation of the lifting cylinder 23 and the lifting cover 24, and then put the tea raw materials into the cleaning cylinder 30 through the feeding channel 200 at the top of the extraction axe 2; then inject water into the cleaning cavity 20 until the tea raw materials are submerged; drive the cleaning cylinder 30 and the lifting frame 35 to rotate by the rotating motor 32 to clean the tea raw materials. S2. Centrifugal dehydration: After cleaning, open the drain pipe 38 to drain the water in the drainage sandwich layer 37, and then drive the cleaning cylinder 30 and the lifting frame 35 to rotate again by the lifting cylinder 23 to centrifugally dehydrate the tea raw materials; S3. Drying treatment: Send the dehydrated tea raw materials to the drying mechanism 5 through the feeding pipeline 7, and dry the tea raw materials by the drying mechanism 5; S4. Crushing treatment: The dried tea raw materials fall from the discharge port of the drying mechanism 5 into the lower crushing mechanism 6 below, and the tea raw materials are crushed by the crushing mechanism 6. S5. Automatic filling: The crushed tea raw materials are pumped from the discharge port of the crushing mechanism 6 into the extraction cavity 21 through the filling pipeline 8, and the tea raw materials are extracted in the extraction cavity 21.

[0042] The implementation principle is: During the cleaning of the tea raw materials, start the rotating motor 32 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 clear water driven by the lifting frame 35 and the cleaning cylinder 30, so as to further improve the cleaning effect and efficiency of the tea raw materials.

[0043] Before lifting the lifting frame 35, first open the drain pipe 38 to pump out the sewage after cleaning, and then drive the cleaning cylinder 30 and the lifting frame 35 to rotate by the rotating motor 32 to centrifugally dehydrate the tea raw materials after cleaning, which can greatly reduce the overall weight of the lifting frame 35 and also accelerate the dehydration of the tea raw materials and improve the drying rate. During centrifugal dehydration, the lifting cover 24 can be blocked at the top of the lifting frame 35, so as to effectively reduce the probability of the tea raw materials being thrown out of the cleaning cylinder 30 during dehydration.

[0044] When the lifting cover 24 takes out the lifting frame 35 from the cleaning cylinder 30 upwards, the lifting frame 35 will gradually approach the upper scraping plate 320. Then start the rotating motor 32 to drive the cleaning cylinder 30 and the scraping plate 320 to rotate synchronously. At this time, the tea raw materials on the cleaning cylinder 30 will be thrown into the adjacent discharge groove 34 under the action of centrifugal force and finally fall into the lower discharge hopper 22. And the tea raw materials on the lifting frame 35 will fall into the adjacent blanking groove 355 under the push of the scraping plate 320 and finally will also fall smoothly into the lower discharge hopper 22.

[0045] 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 later production of essence.

[0046] The above are all preferred embodiments of this application. The protection scope of this application is not limited hereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. An extraction device for natural tea essence, comprising a processing platform (1), and an extraction axe (2) is arranged on the processing platform (1); characterized in that: A cleaning chamber (20) and an extraction chamber (21) are independently arranged in the extraction axe (2), and the cleaning chamber (20) is located above the extraction chamber (21); a raw material cleaning mechanism (3) is arranged in the cleaning chamber (20), and the raw material cleaning mechanism (3) is used for cleaning tea raw materials; a raw material treatment tank (4) located outside the extraction axe (2) is further arranged on the processing platform (1), and a drying mechanism (5) and a crushing mechanism (6) are arranged in the raw material treatment tank (4); a feeding pipeline (7) is arranged between the extraction axe (2) and the raw material treatment tank (4), the feeding port of the feeding pipeline (7) is communicated with the cleaning chamber (20), and the discharging port of the feeding pipeline (7) is used for pumping the cleaned tea raw materials onto the drying mechanism (5); the discharging port of the drying mechanism (5) is used for feeding the dried tea raw materials into the crushing mechanism (6) for crushing; a filling pipeline (8) is arranged between the discharging port of the crushing mechanism (6) and the extraction chamber (21).

2. The extraction device for natural tea essence according to claim 1, characterized in that: The raw material cleaning mechanism (3) includes a cleaning cylinder (30) rotatably arranged in the cleaning chamber (20), and drain holes (31) are formed through the circumferential outer side wall of the cleaning cylinder (30); the raw material cleaning mechanism (3) further includes a rotary motor (32) installed on the outer side wall of the top of the extraction axe (2), a driving rod (33) coaxial with the rotating shaft of the cleaning cylinder (30) is arranged on the output shaft of the rotary motor (32), and the driving rod (33) is fixedly connected with the rotating shaft of the cleaning cylinder (30); a plurality of discharge grooves (34) are formed through the bottom of the cleaning cylinder (30), and a discharge hopper (22) located below the cleaning cylinder (30) is arranged on the inner side wall of the extraction axe (2), and the discharge hopper (22) is used for separating the cleaning chamber (20) from the extraction chamber (21); the feeding port of the feeding pipeline (7) is connected to the discharge port at the bottom of the discharge hopper (22).

3. The extraction device for natural tea essence according to claim 2, characterized in that: A lifting frame (35) is arranged in the cleaning cylinder (30) in a lifting manner, a blocking member (36) corresponding to each discharge groove (34) is arranged at the bottom of the lifting frame (35), and the shape of the blocking member (36) is adapted to the shape of the corresponding discharge groove (34); the blocking member (36) is used for being respectively inserted and fixed in the discharge grooves (34) to block the discharge grooves (34); a drainage interlayer (37) is formed between the circumferential outer side wall of the cleaning cylinder (30) and the inner side wall of the cleaning chamber (20), and a drain pipe (38) communicated with the drainage interlayer (37) is arranged on the outer side wall of the extraction axe (2).

4. The extraction device for natural tea essence according to claim 3, 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 at 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) movably penetrates outside the driving rod (33) and the feeding channel (200); a first limiting platform (350) and a second limiting platform (351) are circumferentially arranged around the outer side wall of the top of the lifting frame (35), the first limiting platform (350) and the second limiting platform (351) are coaxially arranged, and the first limiting platform (350) is located above the second limiting platform (351); the first limiting platform (350) is fixedly arranged on the top of the lifting frame (35), and the second limiting platform (351) is slidably sleeved outside the lifting frame (35) along the lifting direction of the lifting cover (24); a plugging groove (352) is formed between the first limiting platform (350) and the second limiting platform (351), and a plurality of plugging members (240) for synchronously inserting into or withdrawing from the plugging groove (352) are circumferentially arranged on the lifting cover (24), and the plugging members (240) inserted into the plugging groove (352) will rotate relative to the lifting frame (35).

5. The extraction device for natural tea essence according to claim 4, characterized in that: A plurality of blanking grooves (355) penetrate through the lifting frame (35), and a plug board (39) adapted to the shape of each blanking groove (355) is provided at the bottom of the cleaning cylinder (30), and the plug board (39) inserted into the blanking groove (355) is used to block the blanking groove (355); a scraping plate (320) located below the lifting cover (24) is coaxially and fixedly arranged on the output shaft of the rotating motor (32), the scraping plate (320) is located in the cleaning cylinder (30), and the scraping plate (320) is located on the rising path of the lifting frame (35).

6. The extraction device for natural tea essence according to claim 1, characterized in that: The drying mechanism (5) includes a bracket (50) fixedly installed in the raw material processing tank (4), a plurality of layers of raw material conveyor belts (51) are rotatably arranged on the bracket (50), and heating components (52) respectively arranged above each layer of raw material conveyor belt (51) are also provided on the bracket (50).

7. The extraction device for natural tea essence according to claim 6, 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 independent processing chambers (41); the drying mechanism (5) and the crushing mechanism (6) are respectively located in their respective processing chambers (41); a heat circulation component (42) is also provided on the raw material processing tank (4), and the heat circulation component (42) is used to perform heat circulation on the hot air in the processing chamber (41) where the drying mechanism (5) is located.

8. The extraction device for natural tea essence according to claim 7, characterized in that: The crushing mechanism (6) is located below the drying mechanism (5). The crushing mechanism (6) includes a crusher (60) arranged on the inner bottom wall of the raw material processing tank (4), and the top feed inlet of the crusher (60) faces the discharge outlet of the bottom-layer raw material conveyor belt (51); the discharge outlet of the crusher (60) is communicated with the feed inlet of the packing pipeline (8).

9. A method for extracting natural tea essence, using the extraction device for natural tea essence described in any one of the above claims 5 to 8, characterized in that: S1. Raw material cleaning: First, the lifting frame (35) is placed in the cleaning cylinder (30) through the cooperation of 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) at the top of the extraction axe (2); then water is injected into the cleaning cavity (20) until the tea raw materials are submerged; the cleaning cylinder (30) and the lifting frame (35) are driven to rotate by the rotating motor (32) to clean the tea raw materials. 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 treatment: The dehydrated tea raw materials are pumped to the drying mechanism (5) through the feeding pipeline (7), and the drying mechanism (5) is used to dry the tea raw materials; S4. Crushing treatment: The dried tea raw materials fall from the discharge outlet of the drying mechanism (5) into the lower crushing mechanism (6) below, and the crushing mechanism (6) is used to crush the tea raw materials. S5. Automatic filling. The crushed tea raw materials are pumped from the discharge outlet of the crushing mechanism (6) to the extraction cavity (21) through the packing pipeline (8). The tea raw materials are extracted in the extraction cavity (21).

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