Extraction device

Abstract

The application provides an extraction device, comprising a frame, an extraction mother kettle, a replacement mechanism and an extraction sub-kettle. The extraction mother kettle is arranged on the frame and is provided with a first accommodating cavity and a first opening arranged at the top end and communicated with the first accommodating cavity. The replacement mechanism is arranged on the frame, and the extraction sub-kettle is arranged on the replacement mechanism. The extraction sub-kettle can rotate on the replacement mechanism and produce horizontal displacement, and the replacement mechanism is configured to lift and lower the extraction sub-kettle, so that the extraction sub-kettle enters the first accommodating cavity from the first opening. The extraction device of the embodiment of the application is more time-saving and labor-saving, saves labor cost, and has a faster operation speed, so that the extraction efficiency is higher.

Description

Technical Field

[0001] This application relates to the field of extraction technology, specifically to an extraction apparatus. Background Technology

[0002] As people's living standards continue to improve, the requirements for plant extracts are becoming increasingly refined and diversified. In recent years, with the development of advanced processing technologies, supercritical fluid extraction technology has gradually become the preferred method for extracting and separating essential oils from plants, resulting in the rapid development of supercritical fluid extraction equipment.

[0003] An extraction apparatus typically consists of a master extraction vessel and a slave extraction vessel. The slave extraction vessel holds the raw material. During extraction, the slave extraction vessel is located within the master extraction vessel. The supercritical fluid from the master extraction vessel comes into contact with the material in the slave extraction vessel, dissolving the highly efficient components within the material. After dissolution is complete, the slave extraction vessel needs to be manually removed from the master extraction vessel to remove any waste material.

[0004] Manually loading and unloading the extraction sub-reactor is time-consuming, labor-intensive, and inefficient. Summary of the Invention

[0005] The purpose of this invention is to at least solve the problem of low extraction efficiency caused by manually removing and placing the extraction sub-vessel during raw material changes in the extraction device. This purpose is achieved through the following technical solution:

[0006] A first aspect of the present invention provides an extraction apparatus, comprising a frame, a mother extraction vessel, a replacement mechanism, and a daughter extraction vessel. The mother extraction vessel is disposed on the frame and has a first receiving cavity and a first opening disposed at the top and communicating with the first receiving cavity. The replacement mechanism is disposed on the frame, and the daughter extraction vessel is disposed on the replacement mechanism, wherein the daughter extraction vessel is rotatable along the replacement mechanism and generates horizontal displacement, and the replacement mechanism is configured to raise and lower the daughter extraction vessel so that the daughter extraction vessel enters the first receiving cavity from the first opening.

[0007] The extraction device of this application embodiment is equipped with a replacement mechanism that drives the extraction sub-vessel to rise and fall, and allows the extraction sub-vessel to rotate on it. The extraction sub-vessel enters or exits from the first opening through the rising, falling and rotating mechanism. Compared with manually picking up and putting down the extraction sub-vessel, the extraction device of this application embodiment is more time-saving and labor-saving, saves labor costs, and operates faster, thus achieving higher extraction efficiency.

[0008] In addition, the extraction apparatus according to the present invention may also have the following additional technical features:

[0009] In some embodiments of the present invention, the replacement mechanism includes a first driving member and a transmission assembly connected by transmission. The first driving member is disposed on the frame, the extraction sub-vessel is rotatable on the transmission assembly, and the transmission assembly is configured to drive the extraction sub-vessel to rise and fall under the drive of the first driving member.

[0010] In some embodiments of the present invention, the transmission assembly includes a screw, an inner disc, an outer disc, and a limiting rod; one end of the screw is connected to a first driving member; the inner disc is sleeved on the screw and threadedly connected to the screw; the outer disc is sleeved on the inner disc and is rotatable along its own axial direction on the inner disc; the extraction vessel is connected to the outer disc; the limiting rod is fixed to the frame and passes through the inner disc to limit the rotation of the inner disc on the screw; wherein, the threaded rod is configured to rotate under the drive of the first driving member to drive the inner disc and the outer disc to rise or fall.

[0011] In some embodiments of the present invention, the extraction vessel includes a vessel body and a sealing member. The vessel body is connected to a replacement mechanism and has a second opening at its bottom for inserting materials. The vessel body has a second receiving cavity communicating with the second opening. The sealing member is connected to the vessel body and is used to seal the second opening. The side wall of the vessel body surrounding the second receiving cavity and / or the sealing member are provided with through holes for communicating with the first receiving cavity and the second receiving cavity.

[0012] In some embodiments of the present invention, the extraction vessel further includes a stirring device, which includes a second driving member and a stirring member that are connected by a transmission. The second driving member is connected to a replacement mechanism. The vessel body also includes a connecting section disposed on the side of the second receiving cavity opposite to the second opening. The stirring member passes through the connecting section and extends into the second receiving cavity.

[0013] In some embodiments of the present invention, the vessel body further includes a flange portion connected to one end of the connecting section away from the second opening and used to cover the top of the extraction mother vessel. When the flange portion covers the top of the extraction mother vessel, the extraction daughter vessel is suspended in the first receiving cavity.

[0014] In some embodiments of the present invention, the first receiving cavity includes an extended sub-cavity and an expanded sub-cavity that are connected to each other. The extended sub-cavity is in communication with a first opening, and the expanded sub-cavity is located on the side of the extended sub-cavity away from the first opening. When the extraction sub-vessel is placed in the extraction mother vessel, the second receiving cavity is located in the expanded sub-cavity. The extraction mother vessel is provided with an annular groove surrounding the extended sub-cavity and a sealing assembly located in the annular groove. The sealing assembly is configured to be sealed to the extraction sub-vessel when the extraction sub-vessel is placed in the extraction mother vessel.

[0015] In some embodiments of the present invention, the sealing assembly includes an annular support frame, a first sealing structure, and a second sealing structure. The annular support frame has a recessed surface facing the sub-cavity to form a first groove. The first sealing structure is circumferentially disposed in the first groove and used for sealing connection to the extraction sub-vessel. The annular support frame has a recessed surface facing away from the sub-cavity to form a second groove. The second sealing structure is circumferentially disposed in the second groove and sealed connection to the bottom wall of the extraction mother vessel surrounding the annular groove.

[0016] In some embodiments of the present invention, the first sealing structure includes a support member and a sealing member arranged and abutting each other along a first direction. The support member is located on the side of the sealing member away from the expansion sub-cavity. The support member and the sealing member are respectively circumferentially disposed in the first groove. The sealing member includes a first wall, a second wall and a connecting wall respectively circumferentially disposed in the first groove. The first wall and the second wall are arranged opposite each other along a second direction. The connecting wall is connected to the end of the first wall and the second wall facing the support member. The first direction is parallel to the arrangement direction of the insertion sub-cavity and the expansion sub-cavity, and the second direction is perpendicular to the first direction.

[0017] In some embodiments of the present invention, the extraction apparatus further includes a gas storage mechanism, a pressure balancing mechanism, a temperature regulating mechanism, and a separation vessel disposed on the frame. The gas storage mechanism, the pressure balancing mechanism, and the separation vessel are respectively connected to the first receiving cavity. The temperature regulating mechanism includes a temperature regulating pipeline disposed on the outer periphery of the first receiving cavity. The gas storage mechanism is used to deliver gas to the first receiving cavity. The pressure balancing mechanism is used to regulate the pressure of the gas. The temperature regulating mechanism is used to regulate the temperature of the gas so that the gas in the gas storage mechanism is converted into a supercritical fluid. The separation vessel is used to separate the mixed extract and the supercritical fluid. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0019] Figure 1 This is a schematic diagram of the extraction apparatus provided in some embodiments of this application;

[0020] Figure 2 for Figure 1 A schematic diagram of the extraction device shown from another angle;

[0021] Figure 3 for Figure 1 A schematic diagram of the extraction device shown from another angle;

[0022] Figure 4 for Figure 3 The sectional view at AA mainly shows the frame, extraction sub-tank, extraction master tank, and replacement mechanism;

[0023] Figure 5 for Figure 1 A schematic diagram of the inner and outer discs of the replacement mechanism of the extraction device shown;

[0024] Figure 6 for Figure 5 A cross-sectional view of the inner and outer discs of the changing mechanism shown;

[0025] Figure 7 for Figure 1 A cross-sectional view of the extraction vessel of the extraction apparatus shown;

[0026] Figure 8 for Figure 4 Enlarged view of point B in the middle;

[0027] Figure 9 for Figure 1 The diagram shows the structure of the extraction mother vessel and the extraction daughter vessel of the extraction apparatus.

[0028] Figure 10 for Figure 9 Cross-sectional view at CC;

[0029] Figure 11 for Figure 10 Enlarged view of point D in the middle.

[0030] The attached figures are labeled as follows:

[0031] 100. Extraction apparatus;

[0032] 1. Frame;

[0033] 2. Extraction vessel; 21. First receiving cavity; 211. Expansion sub-cavity; 22. Annular groove; 23. Sealing assembly; 231. Annular support frame; 2311. First groove; 2312. Second groove; 232. First sealing structure; 2321. Support; 2322. Sealing element; 2323. First wall; 2324. Second wall; 2325. Connecting wall; 233. Second sealing structure; 234. Clamp; 235. Third sealing structure; 236. Fourth sealing structure; 24. First opening; 25. Stepped structure; 26. Anti-collision block;

[0034] 3. Replacement mechanism; 31. First driving component; 32. Transmission assembly; 321. Screw; 322. Inner disc; 3221. Mounting slot; 323. Outer disc; 3231. Disc body; 3232. Connecting rod; 3233. Protrusion; 324. Limiting rod; 325. Hook;

[0035] 4. Extraction vessel; 41. Vessel body; 411. Hanging ring; 412. Second receiving cavity; 413. Connecting section; 414. Flange; 4141. Main body section; 4142. Bending section; 42. Sealing component; 43. Through hole; 44. Stirring device; 441. Second driving component; 442. Stirring component; 4421. Rod; 4422. Support rod; 443. First bearing; 45. Filter structure; 46. Sealing component;

[0036] 5. Gas storage mechanism; 51. First pipeline;

[0037] 6. Pressure balancing mechanism; 61. Second pipeline;

[0038] 7. Temperature control mechanism; 71. Fourth pipeline;

[0039] 8. Separation vessel; 81. Third pipeline;

[0040] X, the first direction; Y, the second direction. Detailed Implementation

[0041] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0042] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0043] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0044] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0045] Figure 1 This is a schematic diagram of the extraction apparatus provided in some embodiments of this application; Figure 2 for Figure 1 A schematic diagram of the extraction device shown from another angle; Figure 3 for Figure 1 A schematic diagram of the extraction device shown from another angle; Figure 4 for Figure 3 The sectional view at AA mainly shows the frame, extraction sub-tank, extraction master tank, and replacement mechanism.

[0046] like Figures 1-4 As shown, according to an embodiment of the present invention, an extraction apparatus 100 is provided. The extraction apparatus 100 includes a frame 1, an extraction mother vessel 2, a replacement mechanism 3, and an extraction daughter vessel 4. The extraction mother vessel 2 is disposed on the frame 1, and has a first receiving cavity 21 and a first opening 24 disposed at the top and communicating with the first receiving cavity 21. The replacement mechanism 3 is disposed on the frame 1. The extraction daughter vessel 4 is disposed on the replacement mechanism 3, wherein the extraction daughter vessel 4 is rotatable along the replacement mechanism 3 and generates horizontal displacement, and the replacement mechanism 3 is configured to raise and lower the extraction daughter vessel 4 so that the extraction daughter vessel 4 enters the first receiving cavity 21 from the first opening 24.

[0047] In this embodiment of the application, the extraction vessel 4 can rotate along the replacement mechanism 3. This can be due to the extraction vessel 4 rotating along the replacement mechanism 3 under the action of external force, or the replacement mechanism 3 actively driving the extraction vessel 4 to rotate, or other situations where the extraction vessel 4 rotates along the replacement mechanism 3.

[0048] The extraction vessel 4 rotates along the replacement mechanism 3 and generates a horizontal displacement. This can be either the extraction vessel 4 rotating in the horizontal direction or the extraction vessel 4 generating both horizontal and vertical displacements simultaneously during rotation, i.e., rotating at angles to the horizontal and vertical directions respectively.

[0049] For example, the changing mechanism 3 may include a linear drive mechanism and a rotary drive mechanism. The linear drive mechanism is connected to the extraction sub-vessel 4 and can drive the extraction sub-vessel 4 to rise or fall. The rotary drive mechanism is connected to the linear drive mechanism and drives the linear drive mechanism to rotate, thereby causing the extraction sub-vessel 4 to rotate, so as to complete the entry and exit of the extraction sub-vessel 4 in the first opening 24. Optionally, the output end of the linear drive mechanism is connected to the top of the extraction sub-vessel 4, driving it to rise or fall. The rotary drive mechanism is disposed on the frame 1 and connected to the linear drive mechanism through a connector, so as to drive the linear drive mechanism and the extraction sub-vessel 4 to rotate together. Optionally, the linear drive mechanism may include a hydraulic cylinder or a pneumatic cylinder, and the rotary drive mechanism may include a motor and a reducer.

[0050] In a specific application scenario, when the extraction sub-vessel 4 is placed into the extraction mother vessel 2, the changing mechanism 3 first causes the extraction sub-vessel 4 to rise, then causes it to rotate horizontally, and then causes it to descend, thus entering the extraction mother vessel 2 through the first opening 24. The process of removing the extraction sub-vessel 4 from the extraction mother vessel 2 is the reverse of the above process, and will not be described in detail here.

[0051] In a specific application scenario, when the extraction sub-vessel 4 is placed into the extraction mother vessel 2, the changing mechanism 3 first causes the extraction sub-vessel 4 to rise, and then the extraction sub-vessel 4 rotates horizontally along the changing mechanism 3 under the action of external force. The changing mechanism 3 then causes the extraction sub-vessel 4 to descend, thus entering the extraction mother vessel 2 through the first opening 24. The process of removing the extraction sub-vessel 4 from the extraction mother vessel 2 is the reverse of the above process, and will not be described in detail here.

[0052] The extraction device 100 of this application embodiment is equipped with a replacement mechanism 3. The replacement mechanism 3 drives the extraction sub-vessel 4 to rise and fall, and allows the extraction sub-vessel 4 to rotate on it. The extraction sub-vessel 4 enters or exits from the first opening 24 by rising, falling and rotating. Compared with manually picking up and putting down the extraction sub-vessel 4, the extraction device 100 of this application embodiment is more time-saving and labor-saving, saves labor costs, and operates faster, thus achieving higher extraction efficiency.

[0053] In some embodiments, the replacement mechanism 3 includes a first drive member 31 and a transmission assembly 32 connected by transmission. The first drive member 31 is disposed on the frame 1, the extraction sub-vessel 4 is rotatable on the transmission assembly 32, and the transmission assembly 32 is configured to drive the extraction sub-vessel 4 to rise and fall under the drive of the first drive member 31.

[0054] The embodiments of this application do not limit the structure of the first driving component 31, which can be a hydraulic cylinder, a pneumatic cylinder, or a motor, etc.

[0055] The replacement mechanism 3 is configured to include a first driving component 31 and a transmission component 32. That is, the first driving component 31 drives the transmission component 32 to rise and fall. Since the transmission component 32 does not have power, the extraction vessel 4 rotates on the transmission component 32 under the action of external force. Compared with the method of setting a driving mechanism to drive the extraction vessel 4 to rotate, this configuration method has a higher degree of freedom of operation, is more flexible to use, and saves costs.

[0056] Figure 5 for Figure 1 The diagram shows the structure of the inner and outer discs of the replacement mechanism in the extraction device. Figure 6 for Figure 5 A cross-sectional view of the inner and outer discs of the changing mechanism shown.

[0057] Please see Figure 5 and Figure 6 In some embodiments, the transmission assembly 32 includes a screw 321, an inner disk 322, an outer disk 323, and a limiting rod 324; one end of the screw 321 is connected to the first driving member 31; the inner disk 322 is sleeved on the screw 321 and threadedly connected to the screw 321; the outer disk 323 is sleeved on the inner disk 322 and can rotate on the inner disk 322 along its own axial direction; the extraction sub-vessel 4 is connected to the outer disk 323; the limiting rod 324 is fixed to the frame 1 and passes through the inner disk 322 to limit the rotation of the inner disk 322 on the screw 321; wherein, the screw 321 is configured to rotate under the drive of the first driving member 31 to drive the inner disk 322 and the outer disk 323 to rise or fall.

[0058] The first driving component 31 in this embodiment is a motor or other driving component capable of rotating the screw 321.

[0059] This application embodiment does not limit the connection method between the outer disk 323 and the inner disk 322. That is, the outer disk 323 can rotate along the inner disk 322, either by sliding on the inner disk 322 or by rolling on the inner disk 322 to achieve rotation. Since the outer disk 323 is sleeved on the inner disk 322, the outer disk 323 and the inner disk 322 can rise or fall synchronously.

[0060] Optionally, the outer disk 323 includes a disk body 3231 and multiple connecting rods 3232. The disk body 3231 is arranged around the outer periphery of the inner disk 322. The connecting rods 3232 are connected to the surface of the disk body 3231 facing the inner disk 322 and inserted into the inner disk 322. The connecting rods 3232 slide and engage with the inner disk 322. The extraction sub-vessel 4 is connected to the disk body 3231.

[0061] Furthermore, the end of the connecting rod 3232 facing away from the disk body 3231 is provided with a protrusion 3233 extending in a direction perpendicular to the length of the connecting rod 3232. The middle area of ​​the side of the inner disk 322 is recessed to form a mounting groove 3221 that allows the connecting rod 3232 to be inserted and a slot that matches the protrusion 3233. The mounting groove 3221 and the slot are connected. The protrusion 3233 can be locked against the side wall of the slot and thus be confined within the slot, realizing the sliding fit between the inner disk 322 and the outer disk 323.

[0062] In this embodiment of the application, the limiting rod 324 passes through the inner plate 322. For example, the inner plate 322 is provided with a hole that allows the limiting rod 324 to pass through.

[0063] The first driving component 31 drives the screw 321 to rotate. Due to the limiting action of the limiting rod 324, the inner disk 322, which is threadedly connected to the screw 321, rises or falls under the drive of the screw 321 without rotating. Therefore, the extraction sub-vessel 4 can enter or exit the extraction mother vessel 2. When the extraction sub-vessel 4 needs to rotate, the outer disk 323 can be rotated under the action of external force, such as manually rotating the outer disk 323, so that the extraction sub-vessel 4 reaches the set position.

[0064] The screw 321 and inner disc 322 are threaded together, and the first driving member 31 drives the screw 321 to rotate. In this way, the length of the screw 321 can be adjusted so that the transmission assembly 32 has a large operating space in terms of height, that is, it can rise and fall to a greater height, thereby meeting the usage requirements of extraction mother vessel 2 and extraction daughter vessel 4 of different specifications.

[0065] In some embodiments, multiple extraction sub-vessels 4 are arranged at circumferential intervals along the outer disk 323. Optionally, the number of extraction sub-vessels 4 is two. With this arrangement, when an extraction sub-vessel 4 is replaced, the other extraction sub-vessels 4 can directly enter the extraction master vessel 2 for extraction, thereby improving the extraction speed.

[0066] Figure 7 for Figure 1 A cross-sectional view of the extraction vessel of the extraction apparatus shown. Figure 8 for Figure 4 Enlarged view of point B in the middle.

[0067] Please see Figure 7 and Figure 8In some embodiments, the extraction vessel 4 includes a vessel body 41 and a sealing member 42. The vessel body 41 is connected to the replacement mechanism 3 and has a second opening at its bottom for inserting materials. The vessel body 41 has a second receiving cavity 412 communicating with the second opening. The sealing member 42 is connected to the vessel body 41 and is used to seal the second opening. The side wall of the vessel body 41 surrounding the second receiving cavity 412 and / or the sealing member 42 are provided with through holes 43 for communicating with the first receiving cavity 21 and the second receiving cavity 412.

[0068] This application embodiment does not limit the connection method between the vessel body 41 and the replacement mechanism 3. The vessel body 41 and the replacement mechanism 3 can be connected by a threaded connection or by hooking. Specifically, a hook 325 can be connected to the outer plate 323, and a hanging ring 411 adapted to the hook 325 can be connected to the vessel body 41 (see below). Figure 10 This allows for the connection between the two components, making disassembly and reassembly easier.

[0069] This application embodiment does not limit the connection method between the sealing component 42 and the vessel body 41. The two can be connected by threaded connection or snap-fit ​​connection.

[0070] Optionally, the side wall of the vessel body 41 surrounding the second receiving cavity 412 and / or the sealing member 42 are provided with a plurality of through holes 43 for connecting the first receiving cavity 21 and the second receiving cavity 412. The embodiments of this application do not limit the arrangement of the plurality of through holes 43; they can be randomly arranged, or arranged in strips or arrays.

[0071] For example, when the sidewall of the vessel body 41 surrounding the second receiving cavity 412 is provided with multiple through holes 43, they can be arranged circumferentially around the second receiving cavity 412 on the sidewall. Further optionally, the extraction vessel 4 also includes a filter structure 45, which surrounds the second receiving cavity 412 and covers the through holes 43. Specifically, the filter structure can cover the through holes 43 from the side away from the receiving cavity, or from the side facing the receiving cavity. Furthermore, the sidewall has an annular mounting groove communicating with the through holes 43 and located on the side of the through holes 43 away from the second receiving cavity 412, and the filter structure 45 is disposed within the annular mounting groove. The filter structure 45 can include multiple layers of stacked filter screens, specifically including fine filter screens and steel filter screens. Providing the filter structure 45 can significantly reduce the amount of raw material entering the first receiving cavity 21. When the sealing member 42 has through holes 43, a filter structure 45 covering the through holes 43 can also be provided on the sealing member 42.

[0072] A second opening is made at the bottom of the extraction vessel 4, and the second opening is sealed with a sealing member 42. Compared with the solution of opening an opening on the side wall of the vessel body 41, the embodiment of this application facilitates the insertion and removal of raw materials. That is, the raw materials can be removed by removing the sealing member 42 without having to reach in from the side wall, which is more efficient.

[0073] In some embodiments, the extraction vessel 4 further includes a stirring device 44, which includes a second driving member 441 and a stirring member 442 that are connected by a transmission. The second driving member 441 is connected to the replacement mechanism 3. The vessel body 41 also includes a connecting section 413 disposed on the side of the second receiving cavity 412 away from the second opening. The stirring member 442 passes through the connecting section 413 and extends into the second receiving cavity 412.

[0074] For example, the connecting section 413 has a through hole for the stirring element 442 to pass through. The side of the connecting section 413 facing the through hole is recessed towards the side opposite to the through hole, forming a recess. A first bearing is provided within the recess, and the connecting section 413 and the stirring element 442 are connected via the first bearing 443. This configuration can fix the position of the stirring element 442 relative to the vessel body 41, reducing or even avoiding friction between the stirring element 442 and the vessel body 41 during rotation, and improving the reliability of the connection between the stirring element 442 and the vessel body 41.

[0075] The second driving component 441 in this application embodiment may be a motor or other device capable of driving the stirring component 442 to stir.

[0076] Optionally, the second drive component 441 and the agitator 442 are connected by a second bearing, which is fixed to the frame 1.

[0077] This application does not limit the structure of the stirring element 442. Optionally, the stirring element 442 includes a rod body 4421 and a plurality of support rods 4422 disposed on the rod body 4421, the plurality of support rods 4422 being arranged along the axial and / or circumferential direction of the rod body 4421. Optionally, the stirring element 442 includes a rod body 4421 and a plurality of fan blades disposed on the rod body 4421.

[0078] The agitator 442 is installed to ensure that the supercritical fluid and raw materials are in full contact during the extraction process, and it can also quickly break up agglomerated waste materials when removing waste materials.

[0079] In some embodiments, the vessel body further includes a flange 414, which is connected to one end of the connecting section 413 away from the second opening and is used to cover the top of the extraction mother vessel 2. When the flange 414 covers the top of the extraction mother vessel 2, the extraction daughter vessel 4 is suspended in the first receiving cavity 21.

[0080] The specific shape of the flange portion 414 is not limited in this application embodiment. For example, the flange portion 414 can be a plate-like structure perpendicular to the connecting section 413.

[0081] Optionally, the extraction sub-vessel 4 also includes a sealing component 46, which is connected to the side of the flange portion 414 facing the extraction mother vessel 2 and is sandwiched between the extraction sub-vessel 4 and the extraction mother vessel 2 when they are closed, so as to play a sealing role.

[0082] When the flange 414 is closed on the top of the extraction mother vessel 2, the extraction daughter vessel 4 is suspended in the first receiving cavity 21. In this way, compared with the scheme where the extraction daughter vessel 4 is in contact with the bottom of the extraction mother vessel 2, the embodiment of this application can increase the contact area between the supercritical fluid and the raw material located at the bottom of the extraction daughter vessel 4, thereby improving the extraction effect.

[0083] Optionally, the flange portion 414 includes a body segment 4141 and a bent segment 4142, the bent segment 4142 being bent from the end of the body segment 4141 away from the connecting segment 413 towards the second receiving cavity 412. The extraction mother vessel 2 includes a stepped structure 25 located at the top and surrounding the first opening 24, the stepped structure including a first surface, a second surface, and a third surface connected in sequence, the bent segment 4142 surrounding the second surface and abutting against the third surface. By configuring the flange portion 414 to include the body segment 4141 and the bent segment 4142, and providing a stepped structure 25 adapted to it at the top of the extraction mother vessel 2, a better sealing effect can be achieved.

[0084] Figure 9 for Figure 1 The diagram shows the structure of the extraction mother vessel and the extraction daughter vessel of the extraction apparatus. Figure 10 for Figure 9 Cross-sectional view at CC Figure 11 for Figure 10 Enlarged view of point D in the middle.

[0085] Please see Figures 9-11 In some embodiments, the first receiving cavity 21 includes a communicating insertion sub-cavity and an expansion sub-cavity 211. The insertion sub-cavity communicates with the first opening 24, and the expansion sub-cavity 211 is located on the side of the insertion sub-cavity opposite to the first opening. When the extraction sub-vessel 4 is placed in the extraction mother vessel 2, the second receiving cavity 412 is located in the expansion sub-cavity 211. The extraction mother vessel 2 is provided with an annular groove 22 surrounding the insertion sub-cavity and a sealing assembly 23 located within the annular groove 22. The sealing assembly 23 is configured to be sealed to the extraction sub-vessel 4 when the extraction sub-vessel 4 is placed in the extraction mother vessel 2.

[0086] This application does not limit the specific structure of the sealing component 23, as long as it serves a sealing function. For example, it may include multiple rubber sealing rings arranged sequentially along the first direction X, wherein the first direction X is parallel to the arrangement direction of the insertion cavity and the expansion cavity 211.

[0087] For example, in this embodiment of the application, the sealing component 23 is sealed to the connecting section 413 of the extraction vessel 4.

[0088] The sealing component 23 can improve the sealing effect between the extraction sub-vessel 4 and the extraction mother vessel 2, thereby reducing the volume of supercritical fluid escaping from the gap between the extraction sub-vessel 4 and the extraction mother vessel 2.

[0089] In some embodiments, the sealing assembly 23 includes an annular support frame 231, a first sealing structure 232, and a second sealing structure 233. The annular support frame 231 has a recessed surface facing the sub-cavity to form a first groove 2311. The first sealing structure 232 is circumferentially disposed in the first groove 2311 and is used to seal and connect to the extraction sub-vessel 4. The annular support frame 231 has a recessed surface away from the sub-cavity to form a second groove 2312. The second sealing structure 233 is circumferentially disposed in the second groove 2312 and is sealed and connected to the bottom wall of the extraction mother vessel 2 surrounding the annular groove 22.

[0090] The annular support frame 231 of this application embodiment can be made of metal materials, such as steel, or of materials that can provide support, such as plastic.

[0091] The embodiments of this application do not limit the specific structure of the first sealing structure 232 and the second sealing structure 233. For example, both the first sealing structure 232 and the second sealing structure 233 are rubber sealing rings.

[0092] Sealing structures are provided on both the side of the annular support frame 231 facing the sub-cavity and the side away from the sub-cavity, which significantly improves the sealing effect of the sealing assembly 23 relative to the extraction sub-vessel 4 and the extraction mother vessel 2, and further reduces the volume of supercritical fluid escaping from the first receiving cavity 21.

[0093] In some alternative embodiments, the sealing assembly 23 further includes a clamp 234 that surrounds the outer periphery of the annular support frame 231 and holds the annular support frame 231 tightly.

[0094] In some alternative embodiments, the sealing assembly 23 can engage with the two side walls of the annular groove 22 along the first direction X.

[0095] In some embodiments, the first sealing structure 232 includes a support member 2321 and a sealing member 2322 arranged and abutting each other along a first direction X. The support member 2321 is located on the side of the sealing member 2322 away from the expansion sub-cavity 211. The support member 2321 and the sealing member 2322 are respectively circumferentially disposed in the first groove 2311. The sealing member 2322 includes a first wall 2323, a second wall 2324 and a connecting wall 2325 respectively circumferentially disposed in the first groove 2311. The first wall 2323 and the second wall 2324 are arranged opposite each other along a second direction Y. The connecting wall 2325 is connected to the end of the first wall 2323 and the second wall 2324 facing the support member 2321. The first direction X is parallel to the arrangement direction of the insertion sub-cavity and the expansion sub-cavity 211, and the second direction Y is perpendicular to the first direction X.

[0096] The support member 2321 in this embodiment may be made of metal, plastic or other materials that provide support.

[0097] Optionally, the first direction X is perpendicular to the second direction Y.

[0098] The shape of the connecting wall 2325 is not limited in this embodiment. It can be a straight wall or a curved wall that bends toward the first wall 2323 and the second wall 2324.

[0099] The sealing element 2322 is configured to include opposing first wall bodies 2323 and second wall bodies 2324, connected by a connecting wall 2325. This structure has a large deformation capacity, thus providing a better sealing effect. Furthermore, the support member 2321 abuts against the sealing element 2322, i.e., against the connecting wall 2325, providing support and limiting for the sealing element 2322. When the extraction vessel 4 is removed from the insertion cavity, the possibility of the second wall body 2324 near the insertion cavity folding over is reduced, thus reducing the possibility of its failure.

[0100] Optionally, the second sealing structure 233 adopts the same structure as the sealing element 2322, and its connecting wall 2325 is also set away from the expansion cavity 211.

[0101] In some embodiments, the annular support frame 231 has a recessed surface facing the cavity to form a third groove, and a third sealing structure 235 is provided within the third groove. Further optionally, the third sealing structure 235 includes a support ring and a first elastic sealing ring sequentially fitted from the inside out.

[0102] For example, the support ring may be made of metal or plastic.

[0103] For example, the first elastic sealing ring is made of rubber or silicone.

[0104] A third sealing structure 235 is provided to further increase the sealing capability of the sealing assembly 23 to the extraction vessel 4.

[0105] In some embodiments, the annular support frame 231 is recessed away from the surface extending into the sub-cavity to form a fourth groove, and a fourth sealing structure 236 is provided in the fourth groove. Further optionally, the fourth sealing structure 236 includes a second elastic sealing ring.

[0106] A third sealing mechanism and a fourth sealing structure are provided to further improve the sealing effect of the sealing assembly 23 on the bottom wall of the annular groove 22 surrounding the extraction mother vessel 2.

[0107] In some embodiments, the extraction apparatus 100 further includes a gas storage mechanism 5, a pressure balancing mechanism 6, a temperature regulating mechanism 7, and a separation vessel 8 disposed on the frame 1. The gas storage mechanism 5, the pressure balancing mechanism 6, and the separation vessel 8 are respectively connected to the first receiving cavity 21. The temperature regulating mechanism 7 includes a temperature regulating pipeline disposed on the outer periphery of the first receiving cavity 21. The gas storage mechanism 5 is used to deliver gas to the first receiving cavity 21. The pressure balancing mechanism 6 is used to regulate the pressure of the gas. The temperature regulating mechanism 7 is used to regulate the temperature of the gas so that the gas in the gas storage mechanism 5 is converted into a supercritical fluid. The separation vessel 8 is used to separate the mixed extract and the supercritical fluid.

[0108] The gas storage mechanism 5 in this embodiment can be a gas storage tank or other mechanism capable of storing gas.

[0109] Optionally, the gas storage mechanism 5 is connected to the lower part of the extraction mother vessel 2 via the first pipeline 51, that is, it is connected to the lower part of the first receiving cavity 21.

[0110] Optionally, the pressure balancing mechanism 6 is connected to the bottom of the extraction vessel 2 via the second pipeline 61, that is, it is connected to the bottom of the first receiving cavity 21.

[0111] Optionally, the separation vessel 8 is connected to the upper part of the extraction mother vessel 2 via a third pipeline 81, that is, it is connected to the upper part of the first receiving cavity 21.

[0112] Optionally, the temperature control mechanism 7 is connected to the upper and lower parts of the extraction mother vessel 2 via the fourth pipe 71. Further optionally, the temperature control mechanism 7 has water entering through the lower fourth pipe 71 and water exiting through the upper fourth pipe 71.

[0113] When supercritical fluid is introduced through pipelines, its state can easily change within the pipeline, leading to a decrease in extraction efficiency. This embodiment of the application incorporates a pressure balancing mechanism 6 and a temperature control mechanism 7, which directly convert the gas in the gas storage mechanism 5 into supercritical fluid in the first receiving chamber 21 for use, reducing changes in the supercritical fluid's state and improving extraction efficiency. The separation vessel 8 separates the mixed extract from the supercritical fluid for further extraction.

[0114] In some alternative embodiments, the bottom wall of the extraction mother vessel 2 facing the first receiving cavity 21 is provided with a collision protection block 26 to reduce the impact force on the bottom of the extraction daughter vessel 4 when it falls rapidly.

[0115] Optionally, the anti-collision block 26 may be made of materials such as rubber or foam.

[0116] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An extraction device, characterized in that, The utility model relates to an extraction device, comprising: a frame body, an extraction mother kettle arranged in the frame body, which is provided with a first containing cavity and a first opening arranged at the top end and communicated with the first containing cavity; a replacement mechanism arranged in the frame body; an extraction sub-kettle arranged in the replacement mechanism; wherein the extraction sub-kettle can rotate on the replacement mechanism and produce horizontal displacement, and the replacement mechanism is configured to lift the extraction sub-kettle so that the extraction sub-kettle enters the first containing cavity from the first opening; the replacement mechanism comprises a first driving member and a transmission assembly in transmission connection, the first driving member is arranged in the frame body, the extraction sub-kettle can rotate on the transmission assembly, and the transmission assembly is configured to lift the extraction sub-kettle under the drive of the first driving member; the transmission assembly comprises a screw rod, an inner disc, an outer disc and a limiting rod; one end of the screw rod is connected with the first driving member; the inner disc is sleeved on the screw rod and is in threaded connection with the screw rod; the outer disc is sleeved on the inner disc and can rotate on the inner disc in the axial direction of the outer disc, and the extraction sub-kettle is connected with the outer disc; the limiting rod is fixed to the frame body and penetrates through the inner disc to limit the rotation of the inner disc on the screw rod; wherein the screw rod is configured to rotate under the drive of the first driving member to lift or lower the inner disc and the outer disc.

2. The extraction device of claim 1, wherein the extraction sub-kettle comprises a kettle body and a sealing member, the kettle body is connected with the replacement mechanism, and the bottom end is provided with a second opening for putting materials, the kettle body has a second containing cavity communicated with the second opening, and the sealing member is connected with the kettle body and used for sealing the second opening; wherein the side wall of the kettle body surrounding the second containing cavity and / or the sealing member is provided with a through hole for communicating the first containing cavity and the second containing cavity.

3. The extraction device of claim 2, wherein, the extraction sub-kettle further comprises a stirring device, the stirring device comprises a second driving member and a stirring member in transmission connection, and the second driving member is connected with the replacement mechanism; the kettle body further comprises a connecting section arranged on the side of the second containing cavity away from the second opening, the stirring member penetrates through the connecting section and extends into the second containing cavity.

4. The extraction device of claim 3, wherein, the kettle body further comprises a flange part, the flange part is connected to one end of the connecting section away from the second opening and is used for covering the top end of the extraction mother kettle; when the flange part covers the top end of the extraction mother kettle, the extraction sub-kettle is suspended in the first containing cavity.

5. The extraction device according to any one of claims 2-4, characterized in that the first containing cavity comprises an extending sub-cavity and an expanding sub-cavity in communication, the extending sub-cavity is communicated with the first opening, the expanding sub-cavity is located on the side of the extending sub-cavity away from the first opening, and the second containing cavity is located in the expanding sub-cavity when the extraction sub-kettle is placed in the extraction mother kettle; the extraction mother kettle is provided with an annular groove surrounding the extending sub-cavity and a sealing assembly located in the annular groove, and the sealing assembly is configured to be sealingly connected with the extraction sub-kettle when the extraction sub-kettle is placed in the extraction mother kettle.

6. The extraction device of claim 5, wherein, The sealing assembly comprises an annular support frame, a first sealing structure and a second sealing structure, the annular support frame is recessed to form a first groove on a surface facing the extension sub-cavity, the first sealing structure is annularly arranged in the first groove and is sealingly connected to the extraction sub-kettle, the annular support frame is recessed to form a second groove on a surface facing away from the extension sub-cavity, and the second sealing structure is annularly arranged in the second groove and is sealingly connected to the bottom wall of the extraction main kettle surrounding the annular groove.

7. The extraction device of claim 6, wherein, The first sealing structure comprises a support member and a sealing member arranged in a first direction and abutting each other, the support member is located on a side of the sealing member facing away from the expansion sub-cavity, and the support member and the sealing member are annularly arranged in the first groove, The sealing member comprises a first wall body, a second wall body and a connecting wall annularly arranged in the first groove, the first wall body and the second wall body are oppositely arranged in a second direction, and the connecting wall is connected to one end of the first wall body and the second wall body facing the support member, wherein the first direction is parallel to the arrangement direction of the extension sub-cavity and the expansion sub-cavity, and the second direction is perpendicular to the first direction.

8. The extraction device of claim 1, wherein, Further comprising a gas storage mechanism, a pressure balance mechanism, a temperature adjusting mechanism and a separation kettle arranged in the frame body, the gas storage mechanism, the pressure balance mechanism and the separation kettle are respectively communicated with the first containing cavity, the temperature adjusting mechanism comprises a temperature adjusting pipeline arranged on the outer circumferential side of the first containing cavity, the gas storage mechanism is used for conveying gas to the first containing cavity, the pressure balance mechanism is used for adjusting the pressure of the gas, the temperature adjusting mechanism is used for adjusting the temperature of the gas, so that the gas of the gas storage mechanism is converted into supercritical fluid, and the separation kettle is used for separating the mixed extract and the supercritical fluid.

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