Tea seed oil extraction process

Abstract

The application relates to the technical field of tea seed oil extraction, and in particular provides a tea seed oil extraction process, which comprises the following steps: S01, placing shelled tea seeds in an annular oil cylinder of a vertical press; S02, driving a pressing plate of the vertical press to move downwards, so that the pressing plate enters the annular oil cylinder and presses the oil cake; oil generated by the pressing is discharged through pressing oil outlet holes on the wall of the annular oil cylinder and is collected; S03, after the pressing is completed, the pressing plate is driven to move upwards and is separated from the annular oil cylinder; after the pressing plate reaches a preset position, a stirring rod of the vertical press is switched from a state of being stored in a rotating shaft to a horizontally unfolded state and is laid in the annular oil cylinder, so that the process does not need complicated manual intervention, the labor intensity is reduced, and the cleaning efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of tea seed oil extraction technology, and in particular to a tea seed oil extraction process. Background Technology

[0002] Camellia seed oil is a highly nutritious edible vegetable oil, rich in unsaturated fatty acids, vitamins, and other nutrients. It possesses antioxidant and lipid-lowering properties and is widely used in the food, pharmaceutical, and cosmetic industries. Currently, in large-scale camellia seed oil production, pressing is the mainstream extraction method due to its simple process, lack of chemical residues, and preservation of original nutrients. Vertical presses, as the core equipment in this method, are widely used in camellia seed pressing operations due to their compact structure and ease of operation.

[0003] However, due to the presence of the pressure plate, vertical presses do not achieve a proper configuration between the stirring rod and the pressing cylinder. Specifically, placing the stirring and cleaning functions inside the pressing cylinder creates an obstruction to the downward pressing action of the pressure plate, and the pressing of the cake interferes with the stirring and cleaning functions. Therefore, the pressing and cleaning functions are incompatible within the same working space. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a tea seed oil extraction process using a vertical press, comprising the following steps: S01. Place the shelled tea seeds into the annular oil drum of the vertical press; S02. Drive the pressure plate of the vertical press to move downward, so that it enters the annular oil cylinder and presses the oil cake. The oil produced by pressing flows out through the pressing oil outlet hole on the wall of the annular oil cylinder and is collected. S03. After pressing is completed, drive the pressing plate to move upward until it is separated from the annular oil cylinder; after detecting that the pressing plate has reached the preset position, control the stirring rod of the vertical press to switch from the state of being stored in the rotating shaft to the state of being horizontally unfolded, and spread it flat in the annular oil cylinder; S04. Drive the rotating shaft to rotate, thereby driving the horizontally extended stirring rod to stir and clean the annular oil cylinder.

[0005] Preferably, the vertical press includes a frame, an oil receiving hood, an annular oil cylinder, a drive assembly, a pressing assembly, and a stirring linkage mechanism; The oil receiving cover is fixed inside the frame, the annular oil cylinder is fixed to the bottom surface of the inner cavity of the oil receiving cover, and the cylinder wall of the annular oil cylinder is provided with an oil pressing hole. The oil receiving cover is provided with a discharge pipe for discharging oil. The drive assembly includes an electric cylinder fixed on the frame, and the pressing assembly includes a pressure plate connected to the actuating rod of the electric cylinder. The pressure plate is driven to enter or exit the annular oil cylinder. The stirring linkage mechanism includes: The rotating shaft passes vertically through the bottom of the oil receiving cover and extends into the annular oil cylinder. The rotating shaft has a tubular structure and at least one slot is provided in its tube wall. The pressure plate has a through hole in the center for the rotating shaft to pass through. The first driving member is used to drive the rotating shaft to rotate; The stirring rod is rotatably mounted in the slot via a hinge shaft, and the inner end of the stirring rod is provided with a toothed plate; A drive shaft is rotatably disposed within the cavity of the rotating shaft; The second driving component is used to drive the drive shaft to rotate, and the end of the drive shaft is provided with a rack that meshes with the toothed plate; A position detection component is used to detect the position of the pressure plate; The second driving component drives the drive shaft to rotate, and through the meshing of the rack and toothed plate, drives the stirring rod to rotate around the hinge axis, thereby switching the stirring rod between a state where it is housed in the slot and a state where it is horizontally extended into the annular oil cylinder.

[0006] Preferably, the slots are evenly distributed along the circumference of the rotation axis, with a quantity of 4 to 8, and each slot is provided with a stirring rod; the length of the stirring rod is adapted to the inner radius of the annular oil cylinder, and a protrusion is provided at the end of the stirring rod away from the rotation axis. When all the stirring rods are rotated to be vertical in the slot, the protrusions rotate toward the axis of the rotating shaft and abut against each other, and a sealing strip is provided between the side of the stirring rod and the inner surface of the slot.

[0007] Preferably, the racks are evenly distributed along the circumferential direction of the drive shaft, and each rack is adapted to mesh with one of the toothed plates.

[0008] Preferably, the position detection component is an infrared distance sensor, with its transmitting end located at the top of the rotating shaft and its receiving end located on the top surface of the pressure plate.

[0009] Preferably, the bottom surface of the oil receiving hood is inclined, and the discharge pipe is located at the lowest point of the inclination of the oil receiving hood.

[0010] Preferably, the inner wall of the annular oil cylinder is provided with a smooth and wear-resistant coating.

[0011] Preferably, the vertical press further includes a timing controller, which is electrically connected to the position detection element, the first drive element, and the second drive element, and is used to control the predetermined time in step S and the start and stop of each drive element.

[0012] The advantages of this invention compared to the prior art are: This process uses a vertical press to extract tea seed oil, featuring a continuous flow and convenient operation. It effectively solves the problems of residual oil and oil cake debris on the inner wall of the annular oil cylinder and cumbersome cleaning in traditional tea seed oil pressing processes. Through the unfolding and stirring cleaning steps of the stirring rod after pressing, residues on the inner wall of the annular oil cylinder can be thoroughly removed, preventing residual oil from affecting the purity of the next batch of tea seed oil and ensuring product quality. Simultaneously, the flexible switching between the retracted and horizontally unfolded states of the stirring rod, through intelligent detection and drive, avoids errors caused by manual operation. The pressing and stirring / cleaning functions are integrated into the same working space, not only improving functionality but also making the process equipment more integrated. Furthermore, the pressure plate uses a perforated design; when the pressing plate descends, the stirring rod automatically switches to the retracted state, preventing interference with the pressing action. When horizontally unfolded, the stirring rod can cover and rotate inside the annular oil cylinder, achieving comprehensive stirring and cleaning of the annular oil cylinder, solving the problems of incomplete cleaning and low cleaning efficiency in traditional vertical pressing equipment. Attached Figure Description

[0013] Figure 1 A schematic diagram from a first-view perspective of the vertical press in the tea seed oil extraction process provided in an embodiment of the present invention; Figure 2 A schematic diagram showing the cut-open vertical press in the tea seed oil extraction process provided in the embodiments of the present invention; Figure 3 The vertical press in the tea seed oil extraction process provided in the embodiments of the present invention consists of... Figure 2 Enlarged schematic diagram of part A; Figure 4 The vertical press in the tea seed oil extraction process provided in the embodiments of the present invention consists of... Figure 2 Enlarged schematic diagram of section B; Figure 5 The vertical press in the tea seed oil extraction process provided in the embodiments of the present invention consists of... Figure 2 A schematic diagram showing the extended stirring rod rotating to a flattened state; Figure 6 The vertical press in the tea seed oil extraction process provided in the embodiments of the present invention consists of... Figure 5 Enlarged schematic diagram of section C; Figure 7 This is a front view of the vertical press after it has been cut open in the tea seed oil extraction process provided in the embodiments of the present invention.

[0014] In the diagram: 1. Frame; 2. Oil receiving cover; 3. Annular oil cylinder; 4. Pressing oil outlet; 5. Discharge pipe; 6. Electric cylinder; 7. Press plate; 8. Rotating shaft; 9. First driving component; 10. Drive shaft; 11. Second driving component; 12. Stirring rod; 13. Hinge shaft; 14. Toothed plate; 15. Toothed rack; 16. Position detection component; 17. Groove; 18. Through hole; 19. Protrusion; 20. Sealing strip; 21. Connecting sleeve. Detailed Implementation

[0015] The above and other embodiments and advantages of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0016] In one implementation, such as Figures 1-7 As shown: This embodiment provides a tea seed oil extraction process using a vertical press, characterized by the following steps: Extraction using a vertical press, characterized by the following steps: S01. Place the shelled tea seeds into the annular oil drum 3 of the vertical press; The tea seeds need to be dehulled first. Existing conventional tea seed dehulling equipment, such as a drum dehulling machine, can be used to remove the outer shell of the tea seeds. This is not an improvement, but only a preparatory step for the implementation of the process.

[0017] The shelled tea seeds are evenly spread into the annular oil cylinder 3 of the vertical press. The pressure plate 7 enters the annular oil cylinder 3 to achieve effective pressing. It should be noted that the annular oil cylinder 3 is the core housing component of the vertical press. Its inner cavity shape is adapted to the cake-like material after pressing the tea seeds, providing a stable operating space for subsequent pressing, stirring, and cleaning operations; it can effectively reduce the adhesion of tea seeds and oil cake to the inner wall, making it easier to remove and clean the oil cake later.

[0018] S02, drive the vertical press plate 7 to move downwards, so that it enters the annular oil cylinder 3 and presses the oil cake. The oil produced by pressing flows out through the pressing outlet hole 4 on the cylinder wall of the annular oil cylinder 3 and is collected.

[0019] During the downward movement of the press plate 7, a uniform pressure is applied to the tea seeds inside the annular oil cylinder 3. This pressure can be adjusted according to the tea seed variety, typically controlled at 15-20 MPa. The power device driving the press plate 7 is an electric cylinder with built-in pressure detection function; existing technology will not be elaborated upon. Under pressure, the tea seeds are squeezed, and the internal tea seed oil is extruded, forming a hardened oil cake. The oil produced by pressing flows along the pressing outlet holes 4 opened on the wall of the annular oil cylinder 3 to the oil receiving hood 2, and is finally discharged and collected through the discharge pipe 5.

[0020] S03. After pressing is completed, drive the pressure plate 7 to move upward until it is separated from the annular oil cylinder 3; after detecting that the pressure plate 7 has reached the preset position, control the stirring rod 12 of the vertical press to switch from the state of being stored in the rotating shaft 8 to the horizontally unfolded state and spread flat in the annular oil cylinder 3. If the pressing pressure reaches 15-20 MPa and is maintained for 5-10 minutes, the pressing is considered complete. The control drive component reverses its movement, driving the pressure plate 7 upward until it completely disengages from the annular oil cylinder 3 and returns to its initial preset position, i.e., the standby position above the annular oil cylinder 3. The position detection component 16 detects the distance between the pressure plate 7 and the top of the rotating shaft 8 in real time. When the detected distance reaches a preset threshold, i.e., the pressure plate 7 reaches the standby position, a signal is sent to the control unit. After receiving the signal, the control unit triggers the stirring linkage mechanism, i.e., the second drive component 11 drives the drive shaft 10 to rotate, and through the meshing transmission of the rack 15 and the toothed plate 14, drives the stirring rod 12 to rotate around the hinge shaft 13, so that the stirring rod 12, which was originally stored in the slot 17 of the rotating shaft 8, switches to horizontally extended inside the annular oil cylinder 3, providing full coverage for subsequent stirring and cleaning.

[0021] S04. Drive the rotating shaft 8 to rotate, which in turn drives the horizontally extended stirring rod 12 to stir and clean the annular oil cylinder 3.

[0022] After pressing is completed and the oil cake is removed, cleaning liquid is poured into the annular oil drum 3. The timer controller starts the first drive component 9, which drives the rotating shaft 8 to rotate at a constant speed around its own axis, causing the horizontally extended stirring rod 12 to rotate synchronously. This thoroughly removes oil and debris residue. During the stirring and cleaning process, oil cake debris mixes with residual oil and falls into the oil receiving hood 2, and is eventually discharged and collected through the discharge pipe 5. The stirring and cleaning time is controlled by the timer controller, usually 5-10 minutes, to ensure that there is no obvious residue on the inner wall of the annular oil drum 3.

[0023] In another embodiment, the vertical press includes a frame 1, an oil receiving cover 2, an annular oil cylinder 3, a drive assembly, a pressing assembly, and a stirring linkage mechanism. The oil receiving cover 2 is fixed inside the frame 1, the annular oil cylinder 3 is fixed to the bottom surface of the inner cavity of the oil receiving cover 2, and the cylinder wall of the annular oil cylinder 3 is provided with a pressing oil outlet hole 4, and the oil receiving cover 2 is provided with a discharge pipe 5 for discharging oil. The drive assembly includes an electric cylinder 6 fixed on the frame 1, and the pressing assembly includes a pressure plate 7 connected to the actuating rod of the electric cylinder 6. The pressure plate 7 is driven to enter or exit the annular oil cylinder 3. The stirring linkage mechanism includes: The rotating shaft 8 vertically penetrates the bottom of the oil receiving cover 2 and extends into the annular oil cylinder 3. The rotating shaft 8 has a tubular structure and at least one slot 17 is provided on the cylinder wall. The pressure plate 7 has a through hole 18 in the center for the rotating shaft 8 to pass through. The first driving component 9 is used to drive the rotating shaft 8 to rotate. The stirring rod 12 is rotatably mounted in the slot 17 via the hinge shaft 13, and the inner end of the stirring rod 12 is provided with a toothed plate 14; The drive shaft 10 is rotatably disposed in the cavity of the rotating shaft 8; The second driving member 11 is used to drive the drive shaft 10 to rotate. The end of the drive shaft 10 is provided with a rack 15 that meshes with the toothed plate 14. Position detection component 16 is used to detect the position of pressure plate 7; The second driving member 11 drives the drive shaft 10 to rotate, and through the meshing of the rack 15 and the toothed plate 14, it drives the stirring rod 12 to rotate around the hinge shaft 13, thereby switching the stirring rod 12 between the state of being housed in the slot 17 and the state of being horizontally extended into the annular oil cylinder 3.

[0024] The above describes the mechanical components of the oil press. These components work together to achieve a continuous process in tea seed oil extraction, from pressing to stirring, and from stirring to washing. Specifically: The frame 1 serves as the supporting foundation for the entire equipment, used to fix all components such as the oil receiving cover 2, drive assembly, pressing assembly, and stirring linkage mechanism, providing rigid support for the stable operation of each component, ensuring that the equipment does not deform or shift during the pressing process, and guaranteeing the stability of operation.

[0025] The oil collecting cover 2 is fixed inside the frame 1. The frame 1 is welded with reinforcing ribs to support and fix the oil collecting cover 2. The oil collecting cover 2 is the bottom support of the pressing part and also the collection part after the oil is pressed. The annular oil cylinder 3 inside is the core chamber for pressing and stirring the tea seeds. The pressing oil outlet 4 opened on the cylinder wall is used to discharge the oil produced by pressing. After the oil is discharged, it falls into the oil collecting cover 2 and is then discharged and collected through the discharge pipe 5.

[0026] The electric cylinder 6 in the drive assembly is fixed to the top of the frame 1, and its actuating rod is fixedly connected to the pressure plate 7 of the pressing assembly. When pressing is required, the electric cylinder 6 is activated, the driving rod extends downward, and the pressure plate 7 moves downward synchronously, applying pressure to the shelled tea seeds inside the cylinder to complete the pressing. After pressing is completed, the electric cylinder 6 reverses its action, the driving rod retracts upward, and the pressure plate 7 moves upward until it disengages from the annular oil cylinder 3 and returns to the standby position, making room for subsequent stirring and cleaning operations. It is worth noting that the pressure plate 7 has a through hole 18 in the center for the rotating shaft 8 to pass through, which ensures that the pressing plate 7 does not interfere with the rotating shaft 8 when it moves up and down, and ensures that the pressing action and the subsequent stirring rod 12 action do not interfere with each other.

[0027] In addition to the above, the core of the present invention is as follows: the rotating shaft 8 vertically penetrates the bottom of the oil receiving cover 2 and extends into the annular oil cylinder 3. It is a hollow tubular structure. The slot 17 opened in the cylinder wall is used to receive the stirring rod 12. The stirring rod 12 is rotatably installed in the slot 17 through the hinge shaft 13 and can rotate around the hinge shaft 13 in the vertical plane to realize the switching between receiving and unfolding. The drive shaft 10 is rotatably set in the inner cavity of the rotating shaft 8. The rack 15 set at its end meshes with the toothed plate 14 at the inner end of the stirring rod 12 to form a transmission structure. The second drive member 11 is used to drive the drive shaft 10 to rotate, the first drive member 9 is used to drive the rotating shaft 8 to rotate, and the position detection member 16 is used to detect the position of the pressure plate 7 to ensure that the actions of each component are coordinated.

[0028] When the position detection component 16 detects that the pressure plate 7 has risen to the standby position after disengaging from the annular oil cylinder 3, the second drive component 11 is activated, driving the drive shaft 10 to rotate around its own axis. The rack 15 at the end of the drive shaft 10 rotates synchronously. Through the meshing transmission between the rack 15 and the toothed plate 14, the hinge shaft 13 is driven to rotate counterclockwise until the stirring rod 12 switches to the horizontally unfolded state and lies flat inside the annular oil cylinder 3, preparing for subsequent stirring and cleaning. After stirring and cleaning is completed, the second drive component 11 is activated in the reverse direction, driving the drive shaft 10 to rotate in the reverse direction. Through the reverse meshing of the rack 15 and the toothed plate 14, the stirring rod 12 rotates clockwise around the hinge shaft 13 and is retracted into the slot 17 of the rotating shaft 8 to avoid affecting the next pressing action of the pressure plate 7. When the stirring rod 12 is in the horizontally unfolded state, the first drive component 9 is activated, driving the rotating shaft 8 to rotate around its own axis, driving the horizontally unfolded stirring rod 12 to rotate synchronously, thereby achieving stirring and cleaning of the annular oil cylinder 3.

[0029] The stirring rod 12 in this vertical press can flexibly switch between a retracted and horizontally extended state. Through the meshing transmission of the second drive component 11, drive shaft 10, rack 15 and toothed plate 14, the smoothness and accuracy of the stirring rod 12's switching action are ensured, avoiding errors caused by manual operation, and the stirring rod 12 can achieve self-locking in both states. The groove 17 of the rotating shaft 8 enables the effective retraction of the stirring rod 12, and at the same time, the stirring rod 12 and the rotating shaft 8 form a stirring assembly that has both retraction and rotation stirring functions. The two functions are integrated in the same space, reducing space. Moreover, the pressure plate 7 adopts a sleeve hole setting, which avoids the stirring rod 12 interfering with the pressing action when it descends during pressing. After the stirring rod 12 is horizontally extended, it can cover the inner cavity of the annular oil cylinder 3. With the first drive component 9 driving the rotating shaft 8 to rotate, the annular oil cylinder 3 is fully stirred and cleaned, solving the problems of incomplete cleaning and low cleaning efficiency of traditional equipment. The stirring linkage mechanism is set up, and the stirring linkage mechanism switches the stirring rod 12 reasonably between the vertical storage and horizontal unfolding use states. It is also set up with the pressure plate 7 in a nested relationship, so that the pressing function and the cleaning and stirring function are integrated into one working space, saving space and improving the cleaning efficiency of the annular oil cylinder 3.

[0030] Moreover, the fitting of the position detection component 16 with the pressure plate 7 and the matching of the lifting and lowering motion enable precise detection of the position of the pressure plate 7, ensuring that the timing of the unfolding and retraction of the stirring rod 12 is coordinated with the movement of the pressure plate 7, avoiding collision damage between components, extending the service life of the equipment, and realizing intelligent, multi-component linkage action. Without complicated manual intervention, the pressing and cleaning functions can be operated in a continuous manner, effectively improving the production efficiency of tea seed oil extraction and reducing labor intensity.

[0031] In another embodiment, the slots 17 are evenly distributed along the circumference of the rotating shaft 8, and the number is 4 to 8. Each slot 17 is provided with a stirring rod 12. The length of the stirring rod 12 is adapted to the inner radius of the annular oil cylinder 3. The end of the stirring rod 12 away from the rotating shaft 8 is provided with a protrusion 19. When all the stirring rods 12 are rotated to be vertical in the slot 17, the protrusion 19 rotates toward the cavity axis of the rotating shaft 8 and abuts against the drive shaft 10.

[0032] A sealing strip 20 is provided between the side of the stirring rod 12 and the inner surface of the groove 17.

[0033] The slots 17 are evenly distributed around the circumference of the rotation axis 8, with a quantity of 4 to 8. These slots, in conjunction with a corresponding number of stirring rods 12, ensure that the stirring rods 12, when horizontally extended, can evenly cover the entire inner cavity of the annular oil cylinder 3. This avoids the dead zones caused by insufficient or unevenly distributed stirring rods in traditional methods, ensuring that all areas of the inner wall of the annular oil cylinder 3 are thoroughly stirred and cleaned, thus improving cleaning efficiency. When the stirring rods 12 are horizontally extended, their free ends are close to the cavity wall of the annular oil cylinder 3, preventing friction and jamming between the stirring rods and the inner wall, and ensuring smooth cleaning and stirring operations. When the stirring rod 12 is vertically retracted, the protrusion 19 at its free end (the upper end at this time) abuts against the drive shaft 10. Since the stirring rod 12 has 4 to 8 rods, and the drive shaft 10 does not rotate at this time, when these protrusions 19 abut against the rotating shaft 8, it is equivalent to using the drive shaft 10 as a fulcrum to restrict the stirring rod 12 from continuing to rotate in the axial direction, so that their free ends are subjected to force. When the pressing plate 7 descends and presses, the radial expansion force generated by the tea seed material does not cause the stirring rod 12 to swing in the axial direction of the inner cavity of the rotating shaft 8, thereby causing a gap to appear between the groove 17 and the stirring rod 12, causing the tea seed material to enter the inner cavity of the rotating shaft 8 through the gap. When the stirring rod 12 is vertically housed in the slot 17, the sealing strip 20 fits seamlessly with the wall of the slot 17, further preventing tea seed material from entering the inner cavity of the rotating shaft 8. To ensure that the drive shaft 10 is installed stably and can provide support for the stirring rod 12 rotating into the slot 17, bearings are installed at multiple locations in the inner cavity of the rotating shaft 8. The drive shaft 10 passes through these bearings in sequence to improve stability.

[0034] In another embodiment, the rack 15 is evenly distributed along the circumferential direction of the drive shaft 10, and the length of the rack 15 is adapted to the length of the toothed plate 14.

[0035] The racks 15 are evenly distributed along the circumference of the drive shaft 10, and their number matches that of the stirring rods 12 and the slots 17. This ensures that each stirring rod 12 can be driven by meshing with the corresponding rack 15 and toothed plate 14, so that all stirring rods 12 can complete the retraction or unfolding action synchronously. This avoids interference and jamming caused by the asynchronous action of some stirring rods 12, and improves the stability and reliability of the stirring linkage mechanism.

[0036] A vertically upward connecting sleeve 21 is fixed to the top of the pressure plate 7. The bottom end of the connecting sleeve 21 is connected to the through hole 18. The actuating rod of the electric cylinder 6 is fixedly connected to the top of the connecting sleeve 21. The position detection component 16 is an infrared distance sensor, with its transmitting end located at the top of the rotating shaft 8 and its receiving end located inside the connecting sleeve 21. When the pressure plate 7 descends, the connecting sleeve 21 also descends along the periphery of the rotating shaft 8 following the through hole 18. At this time, the cavity of the connecting sleeve 21 is a space to accommodate the rotating shaft 8, and the first driving component is housed inside it. As the pressure plate 7 descends and presses, the slot 17 and the stirring rod 12 are housed inside (at this time, the stirring rod 12 is erected in the slot 17 under the pre-meshing transmission of the rack and toothed plate), further preventing material from flowing into the slot 17 and entering the inner cavity of the rotating shaft 8 from the slot 17.

[0037] Infrared distance sensors are selected as position detection components 16. Compared with traditional contact sensors, their non-contact detection method can effectively avoid the interference of oil and dust on detection accuracy. The detection accuracy is higher and the response speed is faster. It can accurately capture the position signal of the pressure plate 7, ensuring the precise timing of the retraction and unfolding of the stirring rod 12. It avoids problems such as component interference and action jamming caused by detection errors, thus improving the reliability of equipment operation.

[0038] In another embodiment, the bottom surface of the oil receiving cover 2 is inclined, and the discharge pipe 5 is located at the lowest point of the inclination of the oil receiving cover 2.

[0039] The bottom surface of the oil receiving hood 2 is inclined, and together with the discharge pipe 5 at the lowest point of the inclination, the oil and oil-containing mixture are guided by gravity to converge and be discharged at the lowest point. This completely solves the problem of oil residue and sludge accumulation that exists in traditional horizontal bottom oil receiving hoods, ensuring that the oil and oil-containing mixture are completely discharged and avoiding the impact on the life of equipment components due to oxidation and deterioration of residual oil.

[0040] In another embodiment, the inner wall of the annular oil cylinder 3 is provided with a smooth and wear-resistant coating.

[0041] Meanwhile, the inner wall of the annular oil cylinder 3 is provided with a smooth and wear-resistant coating, which can reduce the adhesion of oil and oil cake debris on the inner wall of the annular oil cylinder, so that the residual oil and debris can flow more smoothly into the oil receiving cover 2 with the mixture, further avoiding oil residue and preventing residual oil from oxidizing and deteriorating, thus affecting the life of equipment components.

[0042] In another embodiment, the vertical press further includes a timing controller, which is electrically connected to the position detection element 16, the first drive element 9 and the second drive element 11, and is used to control the predetermined time in step S4 and the start and stop of each drive element.

[0043] The timing controller is used to control the predetermined time in step S4 and the start and stop of each driving component, ensuring precise connection of each process such as the action of the pressing plate 7, the unfolding and retraction of the stirring rod 12, and stirring and cleaning, thereby improving the automation and stability of the equipment operation. The precise control of the predetermined time of each driving component by the timing controller can realize the standardized and automated operation of processes such as pressing, stirring and cleaning, and reduce manual intervention.

[0044] It should be further noted that the first and second driving components mentioned in this invention are motors.

[0045] The above orientation references do not represent the specific orientations of each component in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme and to make relative descriptions based on the orientations of the references. In reality, the specific orientations of each component are based on their actual installation and use, as well as the orientation descriptions that are customary to those skilled in the art. This is hereby stated.

[0046] The specific embodiments described above further illustrate the inventive purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, or improvements made by those skilled in the art within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A tea seed oil extraction process, employing a vertical press for extraction, characterized in that... Includes the following steps: S01. Place the shelled tea seeds into the annular oil cylinder (3) of the vertical press; S02, drive the pressure plate (7) of the vertical press to move downward, so that it enters the annular oil cylinder (3) and presses the oil cake. The oil produced by pressing flows out through the pressing oil outlet (4) on the cylinder wall of the annular oil cylinder (3) and is collected. S03. After pressing is completed, drive the pressing plate (7) to move upward until it is separated from the annular oil cylinder (3); after detecting that the pressing plate (7) has reached the preset position, control the stirring rod (12) of the vertical press to switch from the state of being stored in the rotating shaft (8) to the horizontal unfolding state, and lay it flat in the annular oil cylinder (3); S04. Drive the rotating shaft (8) to rotate, thereby driving the horizontally extended stirring rod (12) to stir and clean the annular oil cylinder (3).

2. The tea seed oil extraction process according to claim 1, characterized in that, The vertical press includes a frame (1), an oil receiving cover (2), an annular oil cylinder (3), a drive assembly, a pressing assembly, and a stirring linkage mechanism; The oil receiving cover (2) is fixed inside the frame (1), the annular oil cylinder (3) is fixed to the bottom surface of the inner cavity of the oil receiving cover (2), and the cylinder wall of the annular oil cylinder (3) is provided with a pressing oil outlet hole (4), and the oil receiving cover (2) is provided with a discharge pipe (5) for discharging oil. The drive assembly includes an electric cylinder (6) fixed on the frame (1), and the pressing assembly includes a pressure plate (7) connected to the actuating rod of the electric cylinder (6). The pressure plate (7) is driven to enter or exit the annular oil cylinder (3). The stirring linkage mechanism includes: A rotating shaft (8) is vertically inserted through the bottom of the oil receiving cover (2) and extends into the annular oil cylinder (3). The rotating shaft (8) is a tubular structure and its tube wall has at least one slot (17). The pressure plate (7) has a through hole (18) in the center for the rotating shaft (8) to pass through. The first driving component 9 is used to drive the rotating shaft (8) to rotate; The stirring rod (12) is rotatably mounted in the slot (17) via the hinge shaft 13, and the inner end of the stirring rod (12) is provided with a toothed plate (14). The drive shaft (10) is rotatably disposed in the cavity of the rotating shaft (8); The second driving member (11) is used to drive the drive shaft (10) to rotate. The end of the drive shaft (10) is provided with a rack (15) that meshes with the toothed plate (14). Position detection component (16) is used to detect the position of the pressure plate (7); The second driving member (11) drives the drive shaft (10) to rotate, and through the meshing of the rack (15) and the toothed plate (14), the stirring rod (12) is driven to rotate around the hinge shaft (13), so that the stirring rod (12) switches between the state of being housed in the slot (17) and the state of being horizontally extended into the annular oil cylinder (3).

3. The tea seed oil extraction process according to claim 2, characterized in that, The slots (17) are evenly distributed along the circumference of the rotating shaft (8), with a quantity of 4 to 8. Each slot (17) is provided with a stirring rod (12). The length of the stirring rod (12) is adapted to the inner radius of the annular oil cylinder (3). The end of the stirring rod (12) away from the rotating shaft (8) is provided with a protrusion (19). When all the stirring rods (12) are rotated to be vertical in the slot (17), the protrusion (19) rotates toward the cavity axis of the rotating shaft (8) and abuts against the outer wall of the drive shaft (10). A sealing strip (20) is provided between the side of the stirring rod (12) and the inner surface of the slot (17).

4. The tea seed oil extraction process according to claim 3, characterized in that, The racks (15) are evenly distributed along the circumferential direction of the drive shaft (10), and each rack (15) is adapted to mesh with a toothed plate (14).

5. The tea seed oil extraction process according to claim 4, characterized in that, The top of the pressure plate (7) is fixed with a vertically upward connecting sleeve (21), the bottom end of the connecting sleeve (21) is connected to the through hole (18), the actuating rod of the electric cylinder (6) is fixedly connected to the top of the connecting sleeve (21), the position detection component (16) is an infrared distance sensor, its transmitting end is located at the top of the rotating shaft (8), and its receiving end is located inside the connecting sleeve (21).

6. The tea seed oil extraction process according to claim 5, characterized in that, The bottom surface of the oil receiving cover (2) is inclined, and the discharge pipe (5) is located at the lowest point of the inclination of the oil receiving cover (2).

7. The tea seed oil extraction process according to claim 6, characterized in that, The inner wall of the annular oil cylinder (3) is provided with a smooth and wear-resistant coating.

8. The tea seed oil extraction process according to claim 7, characterized in that, The vertical press also includes a timing controller, which is electrically connected to the position detection element (16), the first drive element (9) and the second drive element (11), and is used to control the predetermined time in step S4 and the start and stop of each drive element.

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