Centrifugal extraction equipment for extracting tea components

Abstract

The centrifugal extraction equipment comprises a lower support, an outer shell, a rotary drum and a driving device, the outer shell is arranged on the lower support, a discharging pipe with a valve is arranged at the lower end of the outer shell, the rotary drum is rotationally connected to the outer shell, and the driving device is arranged on the lower support. A rotary drum is arranged in the outer shell, filtering holes located in the outer shell are distributed in the side wall of the rotary drum, a stirrer is rotationally connected to the interior of the rotary drum, a hollow inner shaft penetrating out of the outer shell is arranged on the stirrer, and a liquid outlet hole communicated with the interior of the hollow inner shaft is formed in the upper end of the hollow inner shaft; under the rotary stirring action of the stirrer, tea leaves make full contact with the solvent, tea leaf components are transferred into the solvent to form a light extracting solution, the light extracting solution enters the outer shell under the centrifugal force action of the rotary drum, the liquid pump feeds the light extracting solution in the outer shell into the rotary drum and makes contact with the tea leaves again for repeated extraction, and finally a concentrated extracting solution is formed; the solvent is in full contact with tea raw materials, and tea components are extracted more completely.

Description

Technical Field

[0001] The invention relates to the technical field of tea component extraction, in particular to a centrifugal extraction device for extracting tea components. Background Art

[0002] Tea originated in China. Tea was first used as a sacrifice. However, it has been used as food since the late Spring and Autumn Period. It was developed into a medicinal beverage in the middle of the Western Han Dynasty. It was not until the late Western Han Dynasty that it developed into a high-end beverage for the palace. It was not until the Western Jin Dynasty that it became popular among the people as an ordinary beverage. The earliest remains of artificial tea cultivation were found in the Tianluoshan site in Yuyao, Zhejiang, which has a history of more than 6,000 years. Tea drinking began in China. The leaves are leathery, oblong or oval, and can be directly brewed with boiling water. According to modern scientific analysis and identification, tea contains more than 450 kinds of chemical components that are beneficial to the human body, such as chlorophyll, vitamins, lipids, caffeine, tea polyphenols, lipopolysaccharides, proteins and amino acids, carbohydrates, minerals, etc., which have good nutritional value and pharmacological effects on the human body. Tea has both natural health care and medical functions, which are the innate characteristics of tea. Summer and autumn tea is a large category of tea relative to spring tea.

[0003] Extracting tea polyphenols from tea leaves is a common plant extraction operation. Many companies need to extract tea polyphenols from tea leaves for the production of beverages, etc. At present, the extraction of tea polyphenols mainly adopts the extraction method. The equipment mainly includes extraction tanks, vertical immersion extractors, horizontal immersion extractors, vertical percolation extractors and horizontal rotary extractors. The main body of the extraction tank is a cylindrical container, and a false bottom is installed at the bottom to support the solid material to be extracted. The solvent is evenly sprayed on the bed of solid materials, and the materials are accumulated on the false bottom during the extraction process. The vertical immersion extractor consists of three screw conveyors arranged in a U shape. The screw conveyor realizes the movement of materials. The materials are added above the lower tower and conveyed to the lower part. After moving a certain distance in the horizontal direction, they are transported to the upper part of the higher tower by another vertical screw and discharged. During the extraction process, the materials are piled up and move with the screw conveyor. The horizontal immersion extractor has an inclined body, and inside is an inclined horizontal (single or double) screw conveyor. An inlet for solid materials and a discharge port for solution are provided on one end of the extractor, and a solvent inlet is provided on the other end, and a discharge port for residue is provided on the end face. During the extraction process, the material moves with the screw conveyor, which is also easy to cause material accumulation. The vertical percolation extractor is essentially a bucket elevator. There are several hoppers on a vertically arranged conveyor belt. The material is placed in the hopper. There are holes at the bottom of the hopper to allow the solution to flow through. It can be seen that the material will accumulate inside the hopper. The flat-rotating extractor is in a sealed cylindrical container, and several partitions are installed around the central axis to form several compartments. The material accumulates inside each compartment. It can be seen that the extraction equipment for extracting tea components in the prior art has the defects of tea raw material accumulation during use, and the solvent cannot fully contact the tea raw material, which leads to incomplete extraction of tea components. Summary of the invention

[0004] The embodiment of the present invention provides a centrifugal extraction device for extracting tea components, which can solve the problem in the prior art that during the extraction process of tea components, tea raw materials are easily piled up, the solvent cannot fully contact with the tea raw materials, and thus the extraction of tea components is incomplete.

[0005] In order to solve the above technical problems, the present invention adopts the following technical scheme: a centrifugal extraction device for extracting tea components, comprising a lower bracket, an outer shell, a drum and a driving device, the outer shell is arranged on the lower bracket, a discharge pipe with a valve is arranged at the lower end of the outer shell, the drum is rotatably connected to the outer shell, a filtering hole located inside the outer shell is arranged on the side wall of the drum, an agitator is rotatably connected to the inside of the drum, a hollow inner shaft passing through the outer shell is arranged on the agitator, a liquid outlet hole connected to the inside of the drum is opened at the upper end of the hollow inner shaft, the driving device is used to drive the drum and the agitator to rotate in the opposite direction, a feed pipe is arranged at the upper end of the drum, a slag discharge pipe with a valve is arranged on the bottom wall of the drum, a liquid pump is arranged on the lower bracket, a liquid inlet end of the liquid pump is connected to a liquid inlet pipe and a reflux pipe with a valve, the reflux pipe is connected to the inside of the outer shell, and the liquid outlet end of the liquid pump is connected to a liquid replenishing pipe rotatably connected to the lower end of the hollow inner shaft.

[0006] Preferably, a hollow outer shaft is provided at the center of the lower end of the rotating drum, the upper end of the side wall of the rotating drum is rotatably connected to the upper wall of the outer shell, and the hollow outer shaft is rotatably connected to the bottom wall of the outer shell.

[0007] Preferably, a mounting plate is provided on the bottom wall of the lower bracket, and the lower end of the hollow inner shaft passes through the hollow outer shaft and is rotatably connected to the mounting plate.

[0008] Preferably, the driving device includes an annular shell arranged on the infusion tube, the interior of the annular shell is rotatably connected to a rotating shaft, a plurality of water wheel blades are arranged on the rotating shaft, a driving bevel gear is coaxially arranged on the rotating shaft, and a first driven bevel gear meshing with the driving bevel gear is respectively arranged on the hollow outer shaft and the hollow inner shaft.

[0009] Preferably, a guide hole is opened at the center of the upper wall of the rotating drum, a sliding rod is vertically slidably connected to the guide hole, an incomplete internal gear ring is provided at the upper end of the sliding rod, a plurality of connecting rods are provided in a circular array at the lower end of the sliding rod, and the outer end of the connecting rod is connected to a scraper ring that fits the inner wall of the rotating drum.

[0010] Preferably, an annular groove is provided on the inner side of the scraper ring, and the outer end of the connecting rod is inserted into the annular groove.

[0011] Preferably, an upper bracket is provided at the upper end of the outer shell, an incomplete gear is rotatably connected to the upper bracket, a second driven bevel gear meshing with the two first driven bevel gears is rotatably connected to the lower bracket, a driving pulley is coaxially provided on the second driven bevel gear, a driven pulley is coaxially provided on the incomplete gear, and a belt is transmission-connected between the driving pulley and the driven pulley.

[0012] Preferably, the bottom wall of the drum and the bottom wall of the outer shell are both funnel-shaped structures.

[0013] Compared with the prior art, the present invention adopts the coordinated arrangement of a lower bracket, an outer shell, a rotary drum, a driving device, a discharge pipe, a filter hole, an agitator, a hollow inner shaft, a liquid discharge hole, a feed pipe, a slag discharge pipe, a liquid pump, a liquid feed pipe, a reflux pipe and a liquid replenishment pipe. The crushed tea leaves are fed into the rotary drum from the feed pipe, the driving device drives the rotary drum and the agitator to rotate in the opposite direction, the liquid pump absorbs the solvent, the solvent enters the rotary drum through the liquid replenishment pipe and the hollow inner shaft in turn, and part of the solvent enters the outer shell through the filter hole until the entire internal space of the outer shell is filled. Under the rotating stirring action of the agitator, the tea leaves are fully contacted with the solvent, and the tea leaves components are transferred to the solvent to form a light extract. The light extract enters the outer shell under the centrifugal force of the rotary drum, and the liquid pump feeds the light extract in the outer shell into the rotary drum, where it contacts the tea leaves again for repeated extraction, and the finally formed concentrated extract is discharged from the discharge pipe.

[0014] Compared with the prior art, while the extract is discharged from the discharge pipe, the drum continues to rotate, and the tea leaves are dehydrated under the centrifugal force of the drum, forming a filter cake on the inner wall of the drum, so that the extract is completely collected. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0017] Figure 3 For the present invention Figure 2 A schematic diagram of the structure enlargement in the middle;

[0018] Figure 4 For the present invention Figure 2 A magnified schematic diagram of the structure at B in the middle;

[0019] Figure 5 This is a schematic diagram of the top view of the scraper ring of the present invention;

[0020] Figure 6 It is a schematic diagram of the side cross-sectional structure of the annular housing of the present invention;

[0021] Figure 7 It is a schematic diagram of the side view structure of the waist-shaped incomplete internal gear ring of the present invention.

[0022] In the figure: 1, lower bracket; 2, outer shell; 3, drum; 4, feed pipe; 5, hollow outer shaft; 6, filter hole; 7, discharge pipe; 8, mounting plate; 9, hollow inner shaft; 10, liquid pump; 11, liquid inlet pipe; 12, reflux pipe; 13, liquid replenishing pipe; 14, annular shell; 15, rotating shaft; 16, water wheel blade; 17, active bevel gear; 18, first driven bevel gear; 19, liquid outlet hole; 20, guide hole; 21, sliding rod; 22, connecting rod; 23, scraper ring; 24, annular groove; 25, upper bracket; 26, incomplete gear; 27, second driven bevel gear; 28, active pulley; 29, driven pulley; 30, belt; 31, agitator; 32, sealing cover; 33, incomplete inner gear ring. DETAILED DESCRIPTION

[0023] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] like Figure 1 to Figure 7 As shown, a centrifugal extraction device for extracting tea components comprises a lower support 1, an outer shell 2, a rotating drum 3 and a driving device, wherein the outer shell 2 is arranged on the lower support 1, a discharge pipe 7 with a valve is arranged at the lower end of the outer shell 2, the rotating drum 3 is rotatably connected to the outer shell 2, a filtering hole 6 located inside the outer shell 2 is arranged on the side wall of the rotating drum 3, a hollow outer shaft 5 is arranged at the center of the lower end of the rotating drum 3, the upper end of the side wall of the rotating drum 3 is rotatably connected to the upper wall of the outer shell 2, the hollow outer shaft 5 is rotatably connected to the bottom wall of the outer shell 2, a mounting plate 8 is arranged on the bottom wall of the lower support 1, a hollow inner shaft 9 is rotatably connected to the mounting plate 8, the upper end of the hollow inner shaft 9 extends from the hollow outer shaft 5 into the interior of the rotating drum 3, and an agitator 31 and a liquid outlet 19 are arranged at the upper end of the hollow outer shaft 5;

[0025] The driving device includes an annular shell 14 arranged on the liquid replenishing pipe 13, the internal rotation connection of the annular shell 14 is connected with a rotating shaft 15, a plurality of water wheel blades 16 are arranged on the rotating shaft 15, a driving bevel gear 17 is coaxially arranged on the rotating shaft 15, a first driven bevel gear 18 meshing with the driving bevel gear 17 is respectively arranged on the hollow outer shaft 5 and the hollow inner shaft 9, a feed pipe 4 is arranged on the upper end of the drum 3, a sealing cover 32 is threadedly connected on the feed pipe 4, and the sealing cover 32 is used to prevent the extraction liquid from being thrown out of the drum 3 and causing waste when the drum 3 rotates, a slag discharge pipe 13 with a valve is arranged on the bottom wall of the drum 3, a liquid pump 10 is arranged on the lower bracket 1, a liquid inlet end of the liquid pump 10 is connected with a liquid inlet pipe 11 with a valve and a reflux pipe 12, the reflux pipe 12 is communicated with the inside of the outer shell 2, and a liquid outlet end of the liquid pump 10 is connected with a liquid replenishing pipe 13 rotatably connected to the lower end of the hollow inner shaft 9.

[0026] When in use, the crushed tea leaves are fed into the drum 3 from the feed pipe 4 and then sealed with the sealing cover 32. The liquid inlet pipe 11 is connected to the external solvent source, the valve on the liquid inlet pipe 11 is opened, the valve on the reflux pipe 12 is closed, and the liquid pump 10 works to absorb the solvent. The solvent enters the drum 3 through the liquid replenishment pipe 13 and the hollow inner shaft 9 in turn to contact with the tea leaves to form a light extract. Part of the light extract passes through the filter holes 6 and enters the outer shell 2 until the entire inner space of the outer shell 2 is filled. Then, the valve on the liquid inlet pipe 11 is closed, the valve on the reflux pipe 12 is opened, and the liquid pump 10 transports the light extract inside the outer shell 2 to the drum 3 to form a circulating flow. The light extract passing through the liquid replenishment pipe 13 will drive the water wheel blades 16 to rotate, and the water wheel blades 16 will drive the driving bevel gear 17 to rotate, and the driving bevel gear 17 drives the hollow bevel gear 17 through the two first driven bevel gears 18. The outer shaft 5 and the hollow inner shaft 9 rotate in opposite directions. The hollow outer shaft 5 drives the drum 3 to rotate, and the hollow inner shaft 9 drives the agitator 31 to rotate. Under the rotating stirring action of the agitator 31, the tea leaves are fully contacted with the solvent, and the tea leaves components are transferred to the solvent to form an extract. The light extract enters the outer shell 2 under the centrifugal force of the drum 3. The liquid pump 10 sends the light extract in the outer shell 2 into the drum 3, and contacts with the tea leaves again for repeated extraction to finally form a concentrated extract. After opening the valve on the discharge pipe 7, it is discharged from the discharge pipe 7. Then, the valve on the slag discharge pipe 13 is opened, the valve on the liquid inlet pipe 11 is opened, and the valve on the reflux pipe 12 is closed. The liquid inlet pipe 11 is connected to the flushing water source. The liquid pump 10 transports the flushing water to the drum 3 to flush the filter cake inside the drum 3, so that the tea residues are discharged from the device from the slag discharge pipe 13 and the discharge pipe 7 in turn with the flushing water.

[0027] In order to achieve the purpose of more complete extraction of tea components, preferably, a guide hole 20 is opened at the center of the upper wall of the drum 3, and a slide rod 21 is vertically slidably connected to the guide hole 20. The upper end of the slide rod 21 is provided with an incomplete inner gear ring 33, and the lower end of the slide rod 21 is provided with a plurality of connecting rods 22 in a circular array. The outer end of the connecting rod 22 is connected to a scraper ring 23 that fits the inner wall of the drum 3. An upper bracket 25 is provided at the upper end of the outer shell 2, and an incomplete gear 26 is rotatably connected to the upper bracket 25. A second driven bevel gear 27 meshing with the two first driven bevel gears 18 is rotatably connected to the lower bracket 1. A driving pulley 28 is coaxially provided with the second driven bevel gear 27, and a driven pulley 29 is coaxially provided with the incomplete gear 26. A belt 30 is connected between the driving pulley 28 and the driven pulley 29 for transmission.

[0028] Specifically, during the operation of the liquid pump 10, the two first driven bevel gears 18 will drive the second driven bevel gear 27 to rotate, and the second driven bevel gear 27 will drive the driving pulley 28 to rotate. The driving pulley 28 drives the driven pulley 29 to rotate through the belt 30, and the driven pulley 29 drives the incomplete gear 26 to rotate. The incomplete gear 26 drives the slide bar 21 and the scraper ring 23 to perform reciprocating lifting motion through the incomplete inner gear ring 33. During the extraction process, the reciprocating scraper ring 23 continuously scrapes off the tea residue attached to the inner wall of the drum 3, which is beneficial to increase the contact area between the tea residue and the solvent, and avoids the clogging of the filter hole 6, improves the efficiency of the weak extract passing through the filter hole 6 into the outer shell 2, increases the circulation efficiency of the weak extract, and thus increases the extraction effect of the tea components. In the process of cleaning the filter cake on the inner wall of the drum 3, the reciprocating scraper ring 23 scrapes off the filter cake attached to the inner wall of the drum 3, and combines with the flushing water to improve the cleaning effect of the inside of the drum 3.

[0029] Preferably, an annular groove 24 is provided on the inner side of the scraper ring 23, and the outer end of the connecting rod 22 is inserted into the annular groove 24. When the drum 3 rotates, excessive friction between the scraper ring 23 and the inner wall of the drum 3 can be prevented, thereby reducing the wear of the drum 3 and helping to increase the service life of the drum 3.

[0030] In order to achieve the purpose of improving the cleaning effect of the tea residue in the drum 3, preferably, the bottom wall of the drum 3 and the bottom wall of the outer shell 2 are both funnel-shaped structures. The bottom wall of the funnel-shaped structure is conducive to the complete discharge of waste water from the drum 3 and the outer shell 2, thereby improving the cleaning effect of the residue in the drum 3 and the outer shell 2.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0032] Compared with the prior art, the present invention is provided with a lower support 1, an outer shell 2, a drum 3, a driving device, a discharge pipe 7, a filter hole 6, a stirrer 31, a hollow inner shaft 9, a liquid outlet hole 19, a feed pipe 4, a slag discharge pipe 13, a liquid pump 10, a liquid feed pipe 11, a reflux pipe 12 and a liquid replenishment pipe 13. The crushed tea leaves are fed into the drum 3 from the feed pipe 4. The driving device drives the drum 3 and the stirrer 31 to rotate in the opposite direction. The liquid pump 10 absorbs the solvent. The solvent enters the drum 3 through the liquid replenishment pipe 13 and the hollow inner shaft 9 in turn. Part of the solvent enters the outer shell 2 through the filter hole 6 until the entire internal space of the outer shell 2 is filled. Under the rotating stirring action of the stirrer 31, the tea leaves are fully contacted with the solvent, and the tea leaves components are transferred to the solvent to form a light extract. The light extract enters the outer shell 2 under the centrifugal force of the drum 3. The liquid pump 10 feeds the light extract in the outer shell 2 into the drum 3, contacts with the tea leaves again for repeated extraction, and the concentrated extract finally formed is discharged from the discharge pipe 7.

[0033] Compared with the prior art, while the extract is discharged from the discharge pipe 7, the drum 3 continues to rotate, and the tea leaves are dehydrated under the centrifugal force of the drum 3, forming a filter cake on the inner wall of the drum 3, so that the extract is completely collected.

Claims

1. A centrifugal extraction device for extracting tea components, comprising a lower support (1), an outer shell (2), a rotary drum (3) and a driving device, wherein: the outer shell (2) is arranged on the lower support (1), a discharge pipe (7) having a valve is arranged at the lower end of the outer shell (2), the rotary drum (3) is rotatably connected to the outer shell (2), a filtering hole (6) located inside the outer shell (2) is arranged on the side wall of the rotary drum (3), an agitator (31) is rotatably connected inside the rotary drum (3), the agitator (31) is provided with a hollow inner shaft (9) passing through the outer shell (2), and the hollow inner shaft (9) is ) is provided with a liquid outlet hole (19) connected to the interior thereof, the driving device is used to drive the drum (3) and the agitator (31) to rotate in opposite directions, the upper end of the drum (3) is provided with a feed pipe (4), the bottom wall of the drum (3) is provided with a slag discharge pipe (13) with a valve, the lower bracket (1) is provided with a liquid pump (10), the liquid inlet end of the liquid pump (10) is connected to a liquid inlet pipe (11) with a valve and a reflux pipe (12), the reflux pipe (12) is connected to the interior of the outer shell (2), and the liquid outlet end of the liquid pump (10) is connected to a liquid replenishing pipe (13) rotatably connected to the lower end of the hollow inner shaft (9).

2. The centrifugal extraction device for extracting tea components according to claim 1, characterized in that: A hollow outer shaft (5) is arranged at the center of the lower end of the rotating drum (3); the upper end of the side wall of the rotating drum (3) is rotatably connected to the upper wall of the outer shell (2); and the hollow outer shaft (5) is rotatably connected to the bottom wall of the outer shell (2).

3. The centrifugal extraction device for extracting tea components according to claim 2, characterized in that: A mounting plate (8) is provided on the bottom wall of the lower bracket (1), and the lower end of the hollow inner shaft (9) passes through the hollow outer shaft (5) and is rotatably connected to the mounting plate (8).

4. The centrifugal extraction device for extracting tea components according to claim 3, characterized in that: The driving device comprises an annular housing (14) arranged on a liquid infusion tube (13); a rotating shaft (15) is rotatably connected inside the annular housing (14); a plurality of water wheel blades (16) are arranged on the rotating shaft (15); a driving bevel gear (17) is coaxially arranged on the rotating shaft (15); and a first driven bevel gear (18) meshing with the driving bevel gear (17) is respectively arranged on the hollow outer shaft (5) and the hollow inner shaft (9).

5. The centrifugal extraction device for extracting tea components according to claim 4, characterized in that: A guide hole (20) is provided at the center of the upper wall of the rotating drum (3), a slide rod (21) is vertically slidably connected to the guide hole (20), an incomplete inner gear ring (33) is provided at the upper end of the slide rod (21), a plurality of connecting rods (22) are provided in a circular array at the lower end of the slide rod (21), and the outer end of the connecting rod (22) is connected to a scraper ring (23) that is in contact with the inner wall of the rotating drum (3).

6. The centrifugal extraction device for extracting tea components according to claim 5, characterized in that: An annular groove (24) is provided on the inner side of the scraper ring (23), and the outer end of the connecting rod (22) is inserted into the annular groove (24).

7. The centrifugal extraction device for extracting tea components according to claim 6, characterized in that: An upper bracket (25) is provided at the upper end of the outer shell (2), an incomplete gear (26) is rotatably connected to the upper bracket (25), a second driven bevel gear (27) meshing with two first driven bevel gears (18) is rotatably connected to the lower bracket (1), a driving pulley (28) is coaxially provided on the second driven bevel gear (27), a driven pulley (29) is coaxially provided on the incomplete gear (26), and a belt (30) is transmission-connected between the driving pulley (28) and the driven pulley (29).

8. The centrifugal extraction device for extracting tea components according to claim 7, characterized in that: The bottom wall of the rotating drum (3) and the bottom wall of the outer shell (2) are both funnel-shaped structures.

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