Camellia seed low-temperature squeezing device and squeezing method

Abstract

The invention relates to the technical field of camellia seed processing, in particular to a camellia seed low-temperature squeezing device and a squeezing method, and the camellia seed low-temperature squeezing method comprises the following steps: squeezing camellia seeds by adopting the camellia seed low-temperature squeezing device; the low-temperature camellia seed squeezing device comprises a rack, a squeezing screw shaft, a round bar and a heat exchange mechanism, wherein the rack is provided with an oil squeezing chamber; the pressing screw shaft is inserted into the oil pressing cavity and can rotate around the axis of the pressing screw shaft; the round row is sleeved on the pressing screw shaft, and an oil pressing channel is formed between the round row and the pressing screw shaft; an oil discharge channel is formed between every two adjacent round rows, and the oil discharge channels are communicated with the oil pressing channel and the oil pressing cavity at the same time; and the heat exchange mechanism is configured to be capable of extracting the camellia oleosa seed oil from the oil pressing chamber, reducing the temperature and then sending the camellia oleosa seed oil back to the oil pressing chamber, and the temperature of the camellia oleosa seed oil is directly reduced, and the camellia oleosa seed oil is fluid and can flow to each corner of the oil pressing chamber and the pressing screw shaft, so that the temperature distribution uniformity is improved, and the oil product quality is improved.

Description

Technical Field

[0001] This invention relates to the field of camellia seed processing technology, and in particular to a low-temperature pressing device and pressing method for camellia seeds. Background Art

[0002] Camellia seeds are the seeds of the camellia tree. They are rich in oil, usually between 25% and 40%, and are commonly used as raw materials for oil extraction.

[0003] Extraction methods for camellia seed oil include low-temperature pressing, solvent extraction, ultrasonic extraction, and hydroenzymatic extraction. Among these, low-temperature pressing is a method of oil extraction in which the oilseeds are directly pressed without undergoing high-temperature treatments such as steaming or roasting before pressing. This method is widely used because it can better preserve the nutrients in camellia seeds, such as vitamin E and squalene, and can retain the natural flavor and aroma of camellia oil to the greatest extent. In addition, the oil produced is pure and has a high safety factor.

[0004] When pressing camellia seeds for oil using a low-temperature pressing method, a screw oil press is usually used. In related technologies, such as Chinese patent application CN112659617A, an intelligent low-temperature screw oil press with a pressure monitoring device is disclosed. When this intelligent low-temperature screw oil press with a pressure monitoring device is in use, cooling water flows to the feed end through a thin water pipe inside the hollow main shaft, and then flows through the entire screw shaft in the gap between the hollow main shaft and the water inlet pipe, returning to the cake outlet end, thereby achieving the purpose of cooling the pressing chamber.

[0005] Although the aforementioned intelligent low-temperature screw oil press equipped with a pressure monitoring device can control the temperature inside the pressing chamber, it has been found in actual use that, on the one hand, the cooling water mainly absorbs heat by flowing through the narrow gap of the screw shaft, which limits the flow path and makes it difficult for areas of the pressing chamber far from the water pipe to cool down quickly and sufficiently; on the other hand, as the pressing continues, the distribution of camellia seeds inside the pressing chamber is not absolutely uniform, which further exacerbates the uneven heat absorption and thus affects the oil quality of the camellia seeds. Summary of the Invention

[0006] Therefore, it is necessary to provide a low-temperature pressing device and pressing method for camellia seeds to address the problem of low oil quality in the current camellia seed pressing process.

[0007] The above purpose is achieved through the following technical solutions:

[0008] A low-temperature pressing device for camellia seeds, the low-temperature pressing device for camellia seeds comprising:

[0009] The frame has an oil pressing chamber;

[0010] The screw shaft is inserted into the oil pressing chamber and can rotate around its own axis;

[0011] A circular bar is movably sleeved on the screw shaft, and an oil pressing channel is formed between the circular bar and the screw shaft; there are multiple circular bars, adjacent circular bars are arranged close together and form an oil discharge channel, and an oil storage chamber is formed between all the circular bars and the side wall of the oil pressing chamber; the oil discharge channel is connected to both the oil pressing channel and the oil storage chamber.

[0012] The heat exchange mechanism is configured to extract camellia seed oil from the oil pressing chamber, reduce its temperature, and then return it to the oil pressing chamber.

[0013] Furthermore, the heat exchange mechanism includes a first oil extraction component, a heat exchanger, and two heat exchange tubes. The first oil extraction component is configured to extract the camellia seed oil from the oil pressing chamber. The oil extraction end of the first oil extraction component is connected to one end of one of the heat exchange tubes, and the oil outlet end is connected to one end of the other heat exchange tube. The ends of the two heat exchange tubes away from the first oil extraction component are both connected to the oil pressing chamber. The heat exchanger is disposed on the heat exchange tubes and is configured to absorb the heat from the camellia seed oil.

[0014] Furthermore, the low-temperature pressing device for camellia seeds also includes a second oil extraction component, which is configured to extract the camellia seed oil from the pressing chamber.

[0015] Furthermore, the low-temperature pressing device for camellia seeds also includes a partition ring, which is inserted into the oil pressing chamber and sleeved on one of the circular bars. The partition ring can slide along the axial direction of the screw shaft and has corresponding first and second positions before and after sliding. When in the first position, the partition ring divides the oil pressing chamber into a first and second interconnected sub-chamber, and both the first and second oil extraction components can extract camellia seed oil from the second sub-chamber. When in the second position, the partition ring divides the oil pressing chamber into a third and fourth non-interconnected sub-chamber and forms a stop fit with the circular bars to create a pressure difference between the third and fourth sub-chambers under the suction action of the first and second oil extraction components. Under the action of the pressure difference, the partition ring drives the circular bars to move, thereby increasing the gap between adjacent circular bars.

[0016] Furthermore, the camellia seed low-temperature pressing device also includes a first driving member configured to provide a driving force for the sliding of the spacer ring.

[0017] Furthermore, the low-temperature pressing device for camellia seeds also includes a hopper, which is connected to the oil pressing channel and configured to provide camellia seeds into the oil pressing channel.

[0018] Furthermore, the low-temperature pressing device for camellia seeds also includes a feeder configured to control the feeding speed of the hopper.

[0019] Furthermore, the hopper is configured as a conical structure, with the smaller end facing the screw shaft.

[0020] Furthermore, the camellia seed low-temperature pressing device also includes a second driving member, which is configured to provide driving force for the rotation of the screw shaft.

[0021] This invention also provides a method for low-temperature pressing of camellia seeds, using a low-temperature pressing device for camellia seeds, the method comprising the following steps:

[0022] S1. Drives the screw shaft to rotate around its own axis;

[0023] S2. Put the camellia seeds into the oil pressing channel;

[0024] S3. The camellia seed oil is extracted from the pressing chamber through a heat exchange mechanism, and after the temperature is reduced, it is sent back to the pressing chamber.

[0025] The beneficial effects of the present invention are:

[0026] This invention relates to a low-temperature pressing device and method for camellia seeds. The low-temperature pressing method for camellia seeds includes pressing camellia seeds using the low-temperature pressing device. During operation, the device first drives the screw shaft to rotate around its own axis, then the camellia seeds are fed into the pressing channel. As the screw shaft rotates, the camellia seeds move with it while being rubbed and squeezed by the shaft, resulting in oil extraction. The camellia seed oil then enters the pressing chamber through the discharge channel. Simultaneously, a heat exchange mechanism extracts the camellia seed oil from the pressing chamber, lowers its temperature, and then returns it to the pressing chamber. The returned camellia seed oil, being at a lower temperature and being fluid, can quickly lower the temperature of other camellia seed oils and rapidly penetrate the pressing chamber and every nook and cranny of the screw shaft, promoting a more uniform temperature distribution throughout the pressing chamber. This uniform temperature environment not only effectively avoids the adverse effects of localized overheating or overcooling on the oil product but also further improves the quality of the final oil.

[0027] Furthermore, by setting up a second oil extraction component, during use, not only can the camellia seed oil in the pressing chamber be extracted in a timely manner to avoid accumulation and deterioration of oil quality, but also when the oil discharge channel is blocked due to oil residue fragments, the pressing chamber is in an approximately negative pressure environment under the suction action of the second oil extraction component, resulting in a pressure difference on both sides of the oil discharge channel. Under the action of the pressure difference, the camellia seed oil can accelerate through the oil discharge channel and enter the pressing chamber, thereby effectively improving the oil extraction efficiency.

[0028] Furthermore, by setting a partition ring, during use, when the partition ring is in the first position, it divides the oil pressing chamber into a first and second interconnected sub-chamber. Both the first and second oil extraction components can extract camellia seed oil from the second sub-chamber, thus ensuring the normal operation of the oil extraction and heat exchange processes. When the oil discharge channel is completely blocked by oil residue fragments, the partition ring is adjusted to the second position. At this time, the partition ring divides the oil pressing chamber into a third and fourth non-interconnected sub-chamber, and forms a stop with the circular plate. Under the suction action of the first and second oil extraction components, a negative pressure appears in the fourth sub-chamber, which in turn creates a pressure difference between the third and fourth sub-chambers. Under the action of the pressure difference, the partition ring drives the circular plate to move, increasing the gap between adjacent circular plates. Under the impact of the camellia seed oil in the oil pressing channel, the oil residue fragments can be flushed into the oil pressing chamber, preventing further blockage of the oil discharge channel, thus achieving unblocking of the oil discharge channel. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the camellia seed low-temperature pressing device provided in an embodiment of the present invention;

[0030] Figure 2 for Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0031] Figure 3 This is a cross-sectional view of the camellia seed low-temperature pressing device provided in an embodiment of the present invention;

[0032] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point B in the middle;

[0033] Figure 5 This is a partially enlarged structural diagram of the camellia seed low-temperature pressing device provided in an embodiment of the present invention when the diaphragm ring is in the first position.

[0034] Figure 6 A three-dimensional structural diagram of the lower shell and the second oil pump of the low-temperature pressing device for camellia seeds provided in an embodiment of the present invention during assembly.

[0035] Figure 7 This is a three-dimensional structural diagram of the circular array of the low-temperature pressing device for camellia seeds provided in an embodiment of the present invention.

[0036] in:

[0037] 1. Frame; 101. Oil pressing chamber; 102. Upper shell; 1021. Upper cone; 103. Lower shell; 1031. Lower cone; 1032. Oil extraction port; 1033. Oil return port; 1034. Oil suction port;

[0038] 2. Screw shaft;

[0039] 3. Round bar; 301. Boss;

[0040] 4. Heat exchange mechanism; 401. First oil pump; 402. Heat exchanger; 403. Heat exchange tube;

[0041] 5. Second oil pump;

[0042] 6. Spacer ring;

[0043] 7. Drive cylinder;

[0044] 8. Hopper; 801. Support beam; 802. Fixed bearing seat;

[0045] 9. Feeder; 901. Handwheel; 902. First bevel gear; 903. Second bevel gear; 904. Rotary shaft; 905. Screwdriver. Detailed Implementation

[0046] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0047] The serial numbers assigned to components in this document, such as "first," "second," etc., are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used herein, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0048] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0049] like Figures 1 to 7As shown, the low-temperature pressing device for camellia seeds provided in this embodiment of the invention is used for pressing camellia seeds and is configured to include a frame 1, a screw shaft 2, a circular bar 3, and a heat exchange mechanism 4. The frame 1 has an oil pressing chamber 101. The screw shaft 2 is inserted into the oil pressing chamber 101 and can rotate around its own axis. The circular bar 3 is movably sleeved on the screw shaft 2, and an oil pressing channel is formed between the circular bar 3 and the screw shaft 2. There are multiple circular bars 3, and an oil storage chamber is formed between all the circular bars 3 and the side wall of the oil pressing chamber 101. The oil discharge channel is connected to both the oil pressing channel and the oil storage chamber. The heat exchange mechanism 4 is configured to extract camellia seed oil from the oil pressing chamber 101, reduce its temperature, and then send it back into the oil pressing chamber 101.

[0050] Specifically, in this embodiment, to facilitate the formation of the oil pressing chamber 101, part of the frame 1 is configured as a split structure, and this split structure consists of an upper shell 102 and a lower shell 103, such as... Figure 1 , Figure 3 and Figure 6 As shown, the upper shell 102 and the lower shell 103 have the same structure and are both set as semi-circular plate structures, which can be spliced ​​together to form a complete ring structure. This allows the oil pressing chamber 101 to be formed inside the complete ring structure, which provides a stable and suitable space for pressing camellia seeds. On the other hand, it avoids the existence of structural dead corners (corners, gaps, etc.), eliminates the hidden danger that impurities are easy to accumulate in structural dead corners, and reduces the impact of microbial growth, which leads to a decline in oil quality.

[0051] To maintain the overall force balance of the screw shaft 2, reduce the risk of bending and deformation caused by excessive local stress, and ensure the long-term stable and continuous operation of the camellia seed low-temperature pressing device, such as Figure 3 As shown, the screw shaft 2 is horizontally inserted into the complete annular structure formed by the upper shell 102 and the lower shell 103. Specifically, when the screw shaft 2 is placed horizontally, the pressure of the camellia seeds on the screw shaft 2 can be more evenly distributed on the shaft, thereby making the screw shaft 2 as a whole balanced in terms of force. The right end of the screw shaft 2 is the feed end, and the left end is the discharge end.

[0052] like Figure 7 As shown, the circular row 3 is configured as a ring structure; as Figure 3As shown, the number of circular bars 3 can be set to fourteen. All fourteen circular bars 3 are inserted into the oil pressing chamber 101 and are arranged close to each other to achieve a fixed connection. Annular gaps are formed between adjacent circular bars 3. On the one hand, this allows the pressed camellia seed oil to have more outflow paths, so that it can leave the oil pressing channel more efficiently and smoothly, which helps to reduce the retention and accumulation of camellia seed oil in the oil pressing channel. On the other hand, these annular gaps also change the trajectory and flow rate of the oil, so that the camellia seed oil produces a moderate turbulence effect when it flows out, which helps to further block the fine impurities remaining in the camellia seed oil, thereby improving the purity of the oil.

[0053] Understandably, the round bar 3 can be selected from one or more of the following types, such as ordinary flat round bar, round bar with hole, serrated round bar, and concave / convex round bar, depending on the requirements.

[0054] During operation, the screw shaft 2 is first driven to rotate around its own axis. Then, camellia seeds are put into the oil pressing channel. As the screw shaft 2 rotates, the camellia seeds move with the screw shaft 2 and are subjected to friction and compression by the screw shaft 2, thus producing oil. The camellia seed oil then enters the oil pressing chamber 101 through the oil discharge channel. At the same time, the heat exchange mechanism 4 extracts the camellia seed oil from the oil pressing chamber 101, lowers its temperature, and then sends it back into the oil pressing chamber 101. The camellia seed oil that returns to the oil pressing chamber 101 is at a lower temperature and is fluid. It can quickly lower the temperature of other camellia seed oils and quickly penetrate into every corner of the oil pressing chamber 101 and the screw shaft 2, making the temperature distribution in the entire oil pressing chamber 101 more uniform. The uniform temperature environment can not only effectively avoid the adverse effects of local overheating or overcooling on the oil, but also further improve the quality of the final oil.

[0055] Understandably, an oil outlet can be provided at the bottom of the lower shell 103 to facilitate oil discharge and storage; the low-temperature pressing device for camellia seeds is also configured to include an oil storage tank, and the oil outlet is connected to the oil storage tank through a pipe to facilitate timely receipt of camellia seed oil.

[0056] In some embodiments, the heat exchange mechanism 4 may be configured to include a first oil extraction component, a heat exchanger 402, and two heat exchange tubes 403. The first oil extraction component is configured to extract camellia seed oil from the pressing chamber 101. The oil extraction end of the first oil extraction component is connected to one end of one of the heat exchange tubes 403, and the oil outlet end is connected to one end of the other heat exchange tube 403. The ends of the two heat exchange tubes 403 away from the first oil extraction component are both connected to the pressing chamber 101. The heat exchanger 402 is disposed on the heat exchange tubes 403 and is configured to absorb the heat of the camellia seed oil.

[0057] Specifically, in this embodiment, such as Figure 3As shown, the first oil extraction component can be configured as a first oil pump 401, and is horizontally positioned during use to ensure a more uniform distribution of gravity on the internal mechanical components of the first oil pump 401 during operation, avoiding additional off-center loads due to gravity and reducing component wear. To facilitate horizontal installation of the first oil pump 401, both heat exchange tubes 403 are configured as L-shaped tubular structures, with the bends of the heat exchange tubes 403 being horizontal and facing the first oil pump 401, and connected to the first oil pump 401. The ends of both heat exchange tubes 403 away from the first oil pump 401 are vertically connected to the lower housing 103, ensuring both normal conduction of the heat exchange circuit and support for the first oil pump 401. Furthermore, both heat exchange tubes 403 extend along the axial direction of the screw shaft 2 for aesthetic purposes.

[0058] To facilitate the connection between the heat exchange tube 403 and the oil pressing chamber 101, such as Figure 6 As shown, an oil extraction port 1032 is provided at the bottom of the middle part of the lower housing 103, and the oil extraction port 1032 is connected to the oil extraction end of the first oil pump 401. An oil return port 1033 is provided at the bottom of the right end of the lower housing 103, and the oil return port 1033 is connected to the oil outlet end of the first oil pump 401.

[0059] like Figure 3 As shown, the heat exchanger 402 is fitted onto the heat exchange tube 403 on the left side during installation, so as to absorb the heat of the camellia seeds in the heat exchange tube 403 in the circumferential direction, thereby ensuring both heat absorption efficiency and uniform temperature distribution of the camellia seeds.

[0060] It is understandable that the heat exchanger 402 can be set as an evaporator in an existing refrigeration system. Since the refrigerant inside it is continuously in a low-temperature vaporization state, when the camellia seed oil in the heat exchange tube 403 flows through it, the heat exchanger 402 can continuously absorb heat from the camellia seed oil by virtue of its own characteristics.

[0061] Understandably, the first oil pump 401 can be configured as any one of a vane pump, gear pump, plunger pump, or screw pump.

[0062] During use, the first oil pump 401 is started, so that the camellia seed oil in the oil pressing chamber 101 is first drawn into the heat exchange tube 403 through the oil extraction port 1032 under the suction of the first oil pump 401, and then passes through the heat exchange tube 403 and returns to the oil pressing chamber 101 through the oil return port 1033; during the movement of the camellia seed oil in the heat exchange tube 403, when the camellia seed oil passes through the heat exchanger 402, a large amount of heat can be absorbed to achieve rapid cooling.

[0063] In a further embodiment, during the operation of the existing screw oil press, the screw oil press mainly relies on the rotation of the screw shaft 2 to push the camellia seeds to move within the oil pressing chamber 101. The circular bars 3 and the screw shaft 2 work together to squeeze the camellia seeds, causing the oil to seep out. Under this high-intensity compression, the solid components in the camellia seeds are crushed and deformed, forming fine fragments. These fragments accumulate continuously as the pressing process progresses, and easily accumulate in relatively narrow spaces such as the gaps between adjacent circular bars 3, gradually narrowing the oil discharge channel and affecting the normal progress of the oil discharge process. To solve this problem and the oil discharge problem, the camellia seed low-temperature pressing device also includes a second oil extraction component, which is configured to be able to extract camellia seed oil from the oil pressing chamber 101.

[0064] Specifically, in this embodiment, the second oil extraction component can be configured as a second oil pump 5, such as... Figure 6 As shown, the second oil pump 5 is located on the bottom outside of the lower housing 103 during installation, and the oil extraction end is connected to the oil pressing chamber 101, so that it can continuously extract the camellia seed oil accumulated on the bottom inside of the lower housing 103. The bottom inside of the lower housing 103 is the place where camellia seed oil is most likely to accumulate under the action of gravity, which helps to improve the oil extraction efficiency.

[0065] To facilitate the connection between the second oil pump 5 and the oil pressing chamber 101, such as Figure 6 As shown, an oil suction port 1034 is provided at the bottom of the middle part of the lower housing 103. The oil suction port 1034 is connected to the oil suction end of the second oil pump 5. In order to avoid interference, the oil suction port 1032 and the oil suction port 1034 are arranged at intervals along the circumference so that the second oil pump 5 and the heat exchange mechanism 4 can be installed smoothly.

[0066] Understandably, the second oil pump 5 can be configured as any one of a vane pump, gear pump, plunger pump, or screw pump.

[0067] During operation, the second oil pump 5 is started. The second pump continuously draws camellia seed oil from the pressing chamber 101 through the oil suction port 1034. This not only ensures timely extraction of camellia seed oil from the pressing chamber 101, preventing accumulation and degradation of oil quality, but also creates an approximately negative pressure environment inside the pressing chamber 101 when the oil discharge channel is blocked by oil residue. This pressure difference between the two sides of the oil discharge channel accelerates the flow of camellia seed oil into the pressing chamber 101, effectively improving oil extraction efficiency. Furthermore, due to this negative pressure, the pressing chamber 101 cannot be completely filled with camellia seed oil; some space must be left to accommodate air, preventing the second oil pump 5 from stalling.

[0068] In a further embodiment, although the second oil pump 5 can mitigate the impact of oil discharge channel blockage on oil extraction efficiency, it does not fundamentally solve the problem of oil discharge channel blockage. Over time, the oil discharge channel will become increasingly blocked, eventually leading to complete blockage and preventing oil extraction. To address this issue, the low-temperature pressing device for camellia seeds also includes a spacer ring 6. The spacer ring 6 is inserted into the pressing chamber 101 and sleeved on one of the circular bars 3. The spacer ring 6 can slide along the axial direction of the screw shaft 2 and has corresponding first and second positions before and after sliding. In the first position, the partition ring 6 divides the oil pressing chamber 101 into a first and a second compartment that are interconnected. Both the first and second oil extraction components can extract camellia seed oil from the second compartment. In the second position, the partition ring 6 divides the oil pressing chamber 101 into a third and a fourth compartment that are not interconnected. It also forms a stop with the circular array 3 to create a pressure difference between the third and fourth compartments under the suction action of the first and second oil extraction components. Under the action of the pressure difference, the circular array 3 is moved by the partition ring 6 to increase the gap between adjacent circular arrays 3.

[0069] Specifically, in this embodiment, to facilitate dividing the oil pressing chamber 101 into a first and second interconnected chamber when the partition ring 6 is in the first position, and into a third and fourth non-interconnected chamber when the partition ring 6 is in the second position, the partition ring 6 is configured as a ring structure; as follows: Figure 4 , Figure 5 and Figure 6 As shown, an upper conical truncated cone 1021 is provided on the inner arc wall of the middle part of the upper shell 102, and a lower conical truncated cone 1031 is provided on the inner arc wall of the middle part of the lower shell 103. Both the upper conical truncated cone 1021 and the lower conical truncated cone 1031 are semi-circular structures that can be spliced ​​into a complete ring. The side wall surfaces of the upper conical truncated cone 1021 and the lower conical truncated cone 1031 on the side away from the feed end of the screw shaft 2 are both set as annular conical surfaces, so that the upper shell 102 and the lower shell 103 form a narrowing structure from left to right; Figure 5 As shown, the spacer ring 6 is in the first position, at which time the spacer ring 6 is located on the left side of the conical surface. The top of the spacer ring 6 and the conical surface are spaced apart to form a first compartment and a second compartment that are interconnected. The left side of the spacer ring 6 is the first compartment, and the right side is the second compartment. Figure 4 As shown, the partition ring 6 is in the second position. At this time, the partition ring 6 is located on the right side of the cone surface, and the outer peripheral wall of the partition ring 6 coincides with the top of the upper cone 1021 and the top of the lower cone 1031 to form a third and fourth compartment that are not connected to each other. The left side of the partition ring 6 is the third compartment, and the right side is the fourth compartment.

[0070] To ensure that when the spacer ring 6 is in the first position, both the first oil pump 401 and the second oil pump 5 can draw camellia seed oil from the second chamber, and when the spacer ring 6 is in the second position, the suction action of the first oil pump 401 and the second oil pump 5 creates a pressure difference between the third and fourth chambers, such as... Figure 6 As shown, the oil extraction port 1032 and the oil suction port 1034 are both located at the top of the lower cone 1031, and are both located in the second or fourth sub-chamber.

[0071] Understandably, the operation time of the camellia seed low-temperature pressing device can be used to determine whether the oil discharge channel is completely blocked. This is because as the camellia seed low-temperature pressing device operates, the oil discharge channel will become increasingly blocked. Therefore, the operation time of the camellia seed low-temperature pressing device can be used to approximately determine when the oil discharge channel is completely blocked.

[0072] To ensure that when spacer 6 is in the second position, spacer 6 and circular bar 3 can form a stop engagement, such as... Figure 4 As shown, a boss 301 is fitted onto the outer peripheral wall of the circular row 3 where the spacer ring 6 is located. The boss 301 is set as a ring structure so that when the right end face of the spacer ring 6 and the left end face of the boss 301 come into contact, the two are in uniform contact along the circumference, thereby ensuring the uniformity of the force on the spacer ring 6 and the boss 301 and avoiding misalignment due to uneven force, which would lead to accelerated wear.

[0073] During normal oil pressing, the spacer ring 6 is in the first position, such as... Figure 5 As shown, the partition ring 6 is located on the left side of the conical surface. The top of the partition ring 6 and the conical surface are spaced apart to form a first compartment and a second compartment that are interconnected. Under the suction of the first oil pump 401 and the second oil pump 5, the camellia seed oil can move from the first compartment to the second compartment in the direction of the arrow, and then be discharged from the oil pressing chamber 101 from the oil extraction port 1032 and the oil suction port 1034 respectively, thereby ensuring the normal operation of heat exchange and oil extraction.

[0074] When the oil drain channel is completely blocked, it causes the spacer ring 6 to move from the first position to the second position, such as... Figure 4As shown, the partition ring 6 is in the second position. At this time, the partition ring 6 is located on the right side of the cone surface, and the outer peripheral wall of the partition ring 6 coincides with the top of the upper cone 1021 and the top of the lower cone 1031 to form a third and fourth compartment that are not connected to each other. Under the suction of the first oil pump 401 and the second oil pump 5, the pressure in the fourth compartment gradually decreases, resulting in a pressure difference between the third and fourth compartments. As the first oil pump 401 and the second oil pump 5 continue to suction, when the pressure difference becomes large enough, the partition ring 6, through the stop cooperation with the boss 301, drives the circular row 3 below it to move synchronously to the right, so that the multiple circular rows 3 on the left side of the partition ring 6 are no longer in close contact. At this time, under the push of the camellia seed oil in the oil pressing channel, the gap between the multiple circular rows 3 on the left side of the partition ring 6 gradually increases, thereby flushing the oil residue fragments into the oil pressing chamber 101, avoiding further blockage of the oil discharge channel, and thus clearing the oil discharge channel.

[0075] After the blockage is cleared, the partition ring 6 is moved from the second position to the first position. At this time, since the partition ring 6 no longer stops with the boss 301, the multiple round bars 3 on the right side of the partition ring 6 lose their pushing force and begin to move to the left so that the round bars 3 can re-engage tightly and re-form the oil drain channel.

[0076] In a further embodiment, in order to enable the spacer ring 6 to slide along the axial direction of the screw shaft 2 to switch between a first position and a second position, the camellia seed low-temperature pressing device is configured to further include a first driving member, which is configured to provide a driving force for the spacer ring 6 to slide.

[0077] Specifically, in this embodiment, the first driving component can be configured as a driving cylinder 7, such as... Figure 2 As shown, the drive cylinder 7 is mounted on the upper housing 102. The output shaft of the drive cylinder 7 is horizontally to the left and passes through the upper housing 102 and is fixed on the spacer 6 so as to drive the spacer 6 to slide along the axis of the screw shaft 2.

[0078] Understandably, the drive cylinder 7 can be configured as any one of a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder.

[0079] In a further embodiment, to improve the stability of the spacer ring 6 during movement, multiple drive cylinders 7 can be provided and arranged circumferentially. The output shafts of the drive cylinders 7 are all fixed on the end face of the spacer ring 6, which facilitates the synchronous movement of the spacer ring 6 and makes the spacer ring 6 subjected to uniform force.

[0080] As an example, the number of drive cylinders 7 can be set to three, and they are evenly arranged circumferentially.

[0081] In other embodiments, to simplify the operation of pressing camellia seeds for oil, the low-temperature pressing device for camellia seeds is configured to include a hopper 8, which is connected to an oil pressing channel and is configured to provide camellia seeds into the oil pressing channel.

[0082] Specifically, in this embodiment, such as Figure 3 As shown, the hopper 8 is a ring structure with open top and bottom ends, and the lower end is connected to the oil pressing channel, so as to facilitate the receipt of camellia seeds and the transportation of camellia seeds into the oil pressing channel. The hopper 8 is set on the frame 1 and located on the right side of the upper shell 102, so that the hopper 8 has a definite installation position and the right end of the screw shaft 2 is the feeding end.

[0083] In a further embodiment, when the camellia seeds in the hopper 8 are fed under gravity alone, on the one hand, the feeding is unstable, and the feeding speed is sometimes fast and sometimes slow, making it difficult to accurately control the amount of oil input in the subsequent pressing process, thus affecting the quality and efficiency of the oil. On the other hand, blockage is likely to occur because the camellia seeds are of different sizes. During the natural accumulation and falling process, the gaps between the larger camellia seeds are easily filled by the smaller camellia seeds, which increases the force between the camellia seeds and makes it easy to block the discharge port of the hopper 8, causing the entire production line to be interrupted. To solve this problem, the camellia seed low-temperature pressing device also includes a feeder 9, which is configured to control the feeding speed of the hopper 8.

[0084] Specifically, in this embodiment, the feeder 9 can be configured to include a handwheel 901, a first bevel gear 902, a second bevel gear 903, a rotating shaft 904, and an auger 905, as follows: Figure 1 and Figure 3 As shown, to facilitate the installation of the feeder 9, a support beam 801 is horizontally inserted inside the hopper 8. The second bevel gear 903 is rotatably mounted on the top of the support beam 801. A rotating shaft 904 is inserted inside the hopper 8, with its top end vertically penetrating the support beam 801 and fixedly inserted on the second bevel gear 903. Its bottom end is suspended at the discharge port of the hopper 8. An auger 905 is fixedly sleeved on the bottom end of the rotating shaft 904. The handwheel 901 is configured with a T-shaped structure and has a rotating section and a gripping section. To facilitate the installation of the handwheel 901, two fixed bearing seats 802 are provided on the top of the support beam 801. The two fixed bearing seats 802 are arranged at intervals along the extension direction of the support beam 801. When the handwheel 901 is installed, the rotating section is simultaneously inserted on the two fixed bearing seats 802, and the gripping section is suspended. The first bevel gear 902 is fixedly sleeved on the end of the rotating section and meshes with the second bevel gear 903.

[0085] During use, the handwheel 901 is turned, and the handwheel 901 drives the rotating shaft 904 to rotate through the meshing between the first bevel gear 902 and the second bevel gear 903. The rotating shaft 904 synchronously drives the auger 905 to rotate, and the auger 905 synchronously drives the camellia seeds to move downwards, so as to control the feeding speed of the hopper 8.

[0086] In other embodiments, the hopper 8 is configured as a conical structure with the smaller end facing the screw shaft 2.

[0087] Specifically, in this embodiment, such as Figure 3 As shown, the hopper 8 is divided into upper and lower parts. The upper part is set as a ring structure, which makes full use of the space and can achieve preliminary buffering of camellia seeds. It can also be used to install the support beam 801 to avoid interference. The lower part is set as a cone structure, and the small end of the cone structure faces the screw shaft 2, so that under the guidance of the cone structure, the camellia seeds can be more concentrated and accurately gathered at the bottom of the hopper 8.

[0088] In other embodiments, the camellia seed low-temperature pressing device is configured to further include a second drive member, which is configured to provide a driving force for rotating the screw shaft 2.

[0089] Specifically, in this embodiment, the second driving component can be a drive motor. In order to ensure that the rotation speed of the screw shaft 2 is not too fast and to ensure the quality of the oil, the low-temperature pressing device for camellia seeds is also configured to include a reducer. When the drive motor is installed, the motor shaft is connected to the input end of the reducer, and the output end of the reducer is connected to the screw shaft 2 so as to drive the screw shaft 2 to rotate.

[0090] Another embodiment of the present invention provides a method for low-temperature pressing of camellia seeds, which employs a low-temperature pressing device for camellia seeds. The method for low-temperature pressing of camellia seeds includes the following steps:

[0091] S1, drives the screw shaft 2 to rotate around its own axis;

[0092] Specifically, the screw shaft 2 can be rotated by a drive motor and a reducer to avoid the screw shaft 2 rotating too fast and affecting the oil quality.

[0093] S2. Put the camellia seeds into the oil pressing channel;

[0094] Specifically, the camellia seeds can be put into the hopper 8 first, and then the handwheel 901 can be turned. The handwheel 901 drives the rotating shaft 904 to rotate through the meshing between the first bevel gear 902 and the second bevel gear 903. The rotating shaft 904 drives the auger 905 to rotate simultaneously. The auger 905 drives the camellia seeds to move downwards simultaneously, so as to evenly put the camellia seeds into the oil pressing channel.

[0095] S3. The camellia seed oil is extracted from the pressing chamber 101 through the heat exchange mechanism 4, and after the temperature is reduced, it is sent back to the pressing chamber 101.

[0096] Specifically, the first oil pump 401 can be started, so that the camellia seed oil in the oil pressing chamber 101 is first drawn into the heat exchange tube 403 through the oil extraction port 1032 under the suction of the first oil pump 401, and then passes through the heat exchange tube 403 and returns to the oil pressing chamber 101 through the oil return port 1033; during the process of the camellia seed oil moving in the heat exchange tube 403, when the camellia seed oil passes through the heat exchanger 402, it can absorb a large amount of heat to achieve rapid cooling.

[0097] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0098] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A low-temperature pressing device for camellia seeds, characterized in that, The low-temperature pressing device for camellia seeds includes: The frame has an oil pressing chamber; The screw shaft is inserted into the oil pressing chamber and can rotate around its own axis; A circular bar is movably sleeved on the screw shaft, and an oil pressing channel is formed between the circular bar and the screw shaft; there are multiple circular bars, adjacent circular bars are arranged close together and form an oil discharge channel, and an oil storage chamber is formed between all the circular bars and the side wall of the oil pressing chamber; the oil discharge channel is connected to both the oil pressing channel and the oil storage chamber. The heat exchange mechanism is configured to extract camellia seed oil from the oil pressing chamber, reduce its temperature, and then return it to the oil pressing chamber.

2. The low-temperature pressing device for camellia seeds according to claim 1, characterized in that, The heat exchange mechanism includes a first oil extraction component, a heat exchanger, and two heat exchange tubes. The first oil extraction component is configured to extract the camellia seed oil from the oil pressing chamber. The oil extraction end of the first oil extraction component is connected to one end of one of the heat exchange tubes, and the oil outlet end is connected to one end of the other heat exchange tube. The ends of the two heat exchange tubes away from the first oil extraction component are both connected to the oil pressing chamber. The heat exchanger is disposed on the heat exchange tubes and is configured to absorb the heat from the camellia seed oil.

3. The low-temperature pressing device for camellia seeds according to claim 2, characterized in that, The low-temperature pressing device for camellia seeds also includes a second oil extraction component, which is configured to extract the camellia seed oil from the pressing chamber.

4. The low-temperature pressing device for camellia seeds according to claim 3, characterized in that, The low-temperature pressing device for camellia seeds also includes a partition ring, which is inserted into the oil pressing chamber and sleeved on one of the circular bars. The partition ring can slide along the axial direction of the screw shaft and has corresponding first and second positions before and after sliding. When in the first position, the partition ring divides the oil pressing chamber into a first and second interconnected sub-chamber, and both the first and second oil extraction components can extract camellia seed oil from the second sub-chamber. When in the second position, the partition ring divides the oil pressing chamber into a third and fourth non-interconnected sub-chamber and forms a stop fit with the circular bars to create a pressure difference between the third and fourth sub-chambers under the suction action of the first and second oil extraction components. Under the action of the pressure difference, the partition ring drives the circular bars to move, thereby increasing the gap between adjacent circular bars.

5. The low-temperature pressing device for camellia seeds according to claim 4, characterized in that, The camellia seed low-temperature pressing device further includes a first driving member, which is configured to provide a driving force for the sliding of the spacer ring.

6. The low-temperature pressing device for camellia seeds according to claim 1, characterized in that, The low-temperature pressing device for camellia seeds also includes a hopper, which is connected to the oil pressing channel and configured to provide camellia seeds into the oil pressing channel.

7. The low-temperature pressing apparatus for camellia seeds according to claim 6, characterized in that, The low-temperature pressing device for camellia seeds also includes a feeder, which is configured to control the feeding speed of the hopper.

8. The low-temperature pressing apparatus for camellia seeds according to claim 6, characterized in that, The hopper is configured as a cone shape, with the smaller end facing the screw shaft.

9. The low-temperature pressing device for camellia seeds according to claim 1, characterized in that, The low-temperature pressing device for camellia seeds also includes a second driving component, which is configured to provide driving force for the rotation of the screw shaft.

10. A method for low-temperature pressing of camellia seeds, characterized in that, Using the camellia seed low-temperature pressing apparatus as described in any one of claims 1 to 9, the camellia seed low-temperature pressing method includes the following steps: S1. Drives the screw shaft to rotate around its own axis; S2. Put the camellia seeds into the oil pressing channel; S3. The camellia seed oil is extracted from the pressing chamber through a heat exchange mechanism, and after the temperature is reduced, it is sent back to the pressing chamber.

Images