A double-kettle flip-type supercritical fluid extraction device

Abstract

The present invention is used in the field of supercritical fluid extraction technology, and discloses a double kettle flip-type supercritical fluid extraction device, including a support base, an outer mounting ring is fixedly provided in the middle of the upper surface of the support base, and a rotating inner mounting ring is installed on the inner surface of the outer mounting ring, and air holes are provided on the side surfaces of both ends of the drying cover, and a flip switching mechanism is provided on the surface of the outer mounting ring, so as to improve the overall processing efficiency by switching the extraction of double kettles. The double kettle flip-type supercritical fluid extraction device adopts a double kettle flip rotation design. When one extraction kettle is performing extraction operation, the other kettle can perform unloading and loading operations at the same time, which greatly shortens the material change time and realizes continuous production. Compared with the traditional single kettle device, the production efficiency has been greatly improved, and supercritical fluid extraction can be carried out uninterruptedly in large-scale industrial production.

Description

Technical Field

[0001] The invention relates to the technical field of supercritical fluid extraction, in particular to a double-kettle flip-type supercritical fluid extraction device. Background Art

[0002] As an efficient, environmentally friendly, and highly selective separation technology, supercritical fluid extraction (SCFE) has shown great application potential in many fields, such as food, medicine, and chemical industry. In today's society, where product quality and production efficiency are constantly increasing, SCFE, with its unique advantages, is gradually becoming an indispensable and important technical means in many industries. Currently, most SCFE devices widely used in the market are single-reactor structures. These single-reactor SCFE devices have gradually exposed a series of problems that cannot be ignored during actual use.

[0003] First, the disadvantage of a long refueling time in a single-kettle process seriously restricts the improvement of production efficiency. In the operation mode of a single-kettle device, after an extraction operation is completed, it is necessary to wait for the extraction kettle to cool to a suitable temperature before unloading and reloading can be carried out. This process not only consumes a lot of time, but also causes interruptions in the entire production process, making it impossible to achieve continuous production. For those industrial fields with high requirements for production efficiency, this disadvantage of a single-kettle device is particularly prominent. For example, in the food industry, for the production of certain natural extracts, due to large market demand and tight delivery time, the inefficient refueling process of a single-kettle device will lead to an extension of the production cycle and an inability to meet market demand in a timely manner, thereby affecting the company's economic benefits and market competitiveness. In the pharmaceutical field, the extraction of some drug components also requires efficient production equipment to ensure a stable supply of drugs, and the long refueling time of a single-kettle device will undoubtedly hinder production progress and increase production costs.

[0004] Secondly, when a single-kettle device is performing a material change operation, a certain amount of steam usually remains in the extraction kettle. Once the kettle cover is opened, the steam may be released rapidly, posing a risk of scalding to the operator. In the actual production process, the operator needs to be extremely careful in performing the material change operation, which not only increases the complexity and difficulty of the operation, but also makes the production process more uncertain. In order to ensure the safety of the operators, the company has to invest more resources in safety training and the setting of protective measures, which increases the safety management cost. Moreover, even if various protective measures are taken, the risk of scalding cannot be completely eliminated. Once a safety accident occurs, it will not only cause serious harm to the health of the operator, but also have a major impact on the production and operation of the company. Summary of the Invention

[0005] The purpose of the present invention is to provide a double-kettle flip-over supercritical fluid extraction device to solve the problems raised in the above background technology that the long material change time affects the processing efficiency and the residual steam during the material change poses a safety hazard.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a double-kettle flip-type supercritical fluid extraction device, comprising a supporting base, an outer mounting ring fixedly provided in the middle of the upper surface of the supporting base, and a rotatable inner mounting ring installed on the inner surface of the outer mounting ring, an extraction kettle fixedly provided on the inner surface of the inner mounting ring, an injection cap fixedly provided at one end of the extraction kettle by bolts, and an injection valve port fixedly provided on the outer surface of the injection cap facing away from the extraction kettle, a drying cap fixedly provided at the other end of the extraction kettle by bolts, and an output valve port fixedly provided on the outer surface of the drying cap facing away from the extraction kettle, and a desiccant is filled inside the drying cap, an air hole is provided on the side surface of the injection cap facing the extraction kettle, and air holes are provided on the side surfaces of both ends of the drying cap, a flip switching mechanism is provided on the surface of the outer mounting ring, and the overall processing efficiency is improved by switching the extraction of the double kettles.

[0007] Preferably, the flip switching mechanism includes: a driving motor, the driving motor is fixedly mounted on the outer surface of the outer mounting ring, and one end of the output shaft of the driving motor is fixedly connected to the driving gear, the outer surface of the outer mounting ring is fixedly provided with a mounting base, and a rotatable movable rod is installed on the end of the mounting base connected to the outer mounting ring, a fluid connector is fixedly mounted on the one side surface of the movable rod facing the extraction kettle, and a sealing disk is fixedly mounted on the other side surface of the movable rod facing the extraction kettle, a first electric push rod is fixedly mounted on the upper surface of the end of the mounting base away from the outer mounting ring, and the end of the first electric push rod facing the outer mounting ring is fixedly connected to an extrusion frame, and the end of the extrusion frame facing the outer mounting ring is fixedly connected to a clamping rod, and a limiting groove is provided on the outer surface of the inner mounting ring.

[0008] By adopting the above technical solution, the two extraction kettles can be turned over and rotated to achieve alternating extraction and improve processing efficiency.

[0009] Preferably, a second electric push rod is fixedly provided on the outer surface of the outer mounting ring, and a rotating electric heating plate is installed on the side surface of one end of the second electric push rod facing the extraction kettle, the electric heating plate is arc-shaped, and a spring is connected between the outer surface of the electric heating plate and one end of the second electric push rod, and the inner surface of the electric heating plate is in contact with the outer surface of the extraction kettle.

[0010] By adopting the above technical solution, the electric heating plate can heat the extraction kettle.

[0011] Preferably, a pressure unsealing mechanism is provided inside the injection cap, which opens the cap under pressure to avoid burns caused by the outflow of high-temperature gas when replacing raw materials.

[0012] By adopting the above technical solution, steam will not overflow from the injection valve port before the injection cover is opened, causing a safety accident.

[0013] Preferably, the pressure unsealing mechanism includes a closing plate, which is slidably mounted inside the injection cap, and a first fixed plate is fixedly provided on the outer surface of the closing plate, and a second fixed plate is fixedly provided on the inner surface of the injection cap on one side of the first fixed plate, an air hole is opened on the outer surface of the closing plate, a center rod is fixedly mounted on one end of the closing plate facing the injection valve port, and one end of the center rod is rotatably connected to the injection valve port, and a sliding sliding rod is installed on the end of the center rod rotatably connected to the injection valve port, the end of the sliding rod facing away from the center rod is fixedly connected to a piston plate, and a twisted rod is fixedly provided on the side surface of the piston plate, a piston cylinder is fixedly provided on the inner surface of the injection valve port, and a clamping rod is fixedly provided on the inner surface of the piston cylinder.

[0014] By adopting the above technical solution, the injection valve port can be automatically opened when the fluid is injected.

[0015] Preferably, gear blocks are evenly and fixedly provided on the outer surface of the inner mounting ring, and the inner mounting ring is meshedly connected with the driving gear through the gear blocks.

[0016] By adopting the above technical solution, the inner mounting ring can be driven to rotate relative to the outer mounting ring.

[0017] Preferably, a spring is connected between the movable rod and the mounting base, the outer surface of the sealing disk is in contact with one end surface of the injection cover and the drying cover, and the sealing disk is connected to one end of the fluid connector.

[0018] By adopting the above technical solution, the sealing disc can respectively seal and connect the injection cover and the drying cover.

[0019] Preferably, the extrusion frame is designed in a C shape, and the two ends of the extrusion frame are respectively fitted with the movable rods on both sides. One end of the clamping rod is designed as an isosceles trapezoid, and the end of the clamping rod with an isosceles trapezoidal design passes through the inner surface of the outer mounting ring and is clamped and installed in the limit groove.

[0020] By adopting the above technical solution, the clamping rod can limit the relative positions of the outer mounting ring and the inner mounting ring by engaging with the limiting groove.

[0021] Preferably, the air holes on the surface of the closing plate and the air holes on the outer surface of the injection cover facing the extraction kettle are staggered, and the outer surface of the closing plate fits the inner surface of the injection cover, the first fixing plate and the second fixing plate are staggered, and a spring is connected between the first fixing plate and the second fixing plate.

[0022] By adopting the above technical solution, the first fixing plate and the second fixing plate can rotate and reset the closing plate under the pull of the spring.

[0023] Preferably, a spring is connected between the center rod and the sliding rod, the piston plate and the piston cylinder are connected by sliding friction, the twisted rod and the clamping rod are installed in engagement, and the center rod, sliding rod, piston plate and twisted rod are all concentrically arranged.

[0024] By adopting the above technical solution, the twisted rod can drive the closing plate to rotate so that the pores on the surface of the closing plate coincide with the pores on the surface.

[0025] Compared with the prior art, the present invention has the following beneficial effects: the double-kettle flip-type supercritical fluid extraction device:

[0026] 1. The dual-kettle rotation design allows one kettle to be unloaded and loaded while the other kettle is performing extraction, greatly shortening the reloading time and achieving continuous production. Compared with the traditional single-kettle device, the production efficiency has been greatly improved. In large-scale industrial production, supercritical fluid extraction can be carried out uninterruptedly.

[0027] Furthermore, the dual-reactor design eliminates the need to wait for a single reactor to cool before re-routing, saving significant time and cost. Furthermore, the reactor rotation operation makes the supercritical fluid extraction process more stable, reducing the impact of frequent re-routing and temperature fluctuations on the extraction effect, thereby ensuring the stability and consistency of product quality.

[0028] 2. The design of opening the reaction air inlet through gas pressure avoids direct contact between operators and the high-temperature and high-pressure extraction kettle, reducing the risk of steam burns. Operators can operate in a safe environment without worrying about injuries caused by steam release due to opening the kettle cover. This not only ensures the personal safety of operators, but also reduces the uncertainty of manual operation and improves the stability and reliability of the production process.

[0029] Furthermore, precise gas pressure control opens the gas inlet, ensuring stable input of supercritical fluid, which is beneficial to optimizing the extraction process and further improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the three-dimensional structure of the connection between the movable rod and the fluid connector of the present invention;

[0032] Figure 3 This is a schematic diagram of the overall working state of the present invention;

[0033] Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention in the connection working state between the mounting base and the movable rod;

[0034] Figure 5 It is a schematic diagram of the three-dimensional structure of the overall cross-section of the present invention;

[0035] Figure 6 This is a schematic diagram of the three-dimensional structure of the connection section of the mounting base, the first electric push rod and the clamping rod of the present invention;

[0036] Figure 7 This is a schematic diagram of the three-dimensional structure of the cross-section of the extrusion frame, the clamping rod and the limiting groove of the present invention;

[0037] Figure 8 This is a schematic diagram of the three-dimensional structure of the cross-section of the connection between the center rod and the sliding rod of the present invention;

[0038] Figure 9 This is a schematic diagram of the three-dimensional structure of the connection between the closing plate and the first fixing plate of the present invention;

[0039] Figure 10 It is a schematic diagram of the three-dimensional structure of the connection between the inner mounting ring, the extraction kettle and the limiting groove of the present invention.

[0040] In the figure: 1. Support base; 2. Outer mounting ring; 3. Inner mounting ring; 4. Extraction kettle; 5. Injection cover; 6. Injection valve port; 7. Drying cover; 8. Output valve port; 9. Drive motor; 10. Drive gear; 11. Mounting base; 12. Movable rod; 13. Fluid connector; 14. Sealing disk; 15. First electric push rod; 16. Extrusion frame; 17. Clamping rod; 18. Limiting groove; 19. Second electric push rod; 20. Electric heating plate; 21. Closing plate; 22. First fixed plate; 23. Second fixed plate; 24. Center rod; 25. Sliding rod; 26. Piston plate; 27. Twisted rod; 28. Piston cylinder; 29. ​​Clamping rod. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] See also Figures 1-10The present invention provides a technical solution: a double-kettle flip-type supercritical fluid extraction device.

[0043] Embodiment 1: This embodiment discloses a support base 1, an outer mounting ring 2 is fixedly provided in the middle of the upper surface of the support base 1, and a rotatable inner mounting ring 3 is installed on the inner surface of the outer mounting ring 2, an extraction kettle 4 is fixedly provided on the inner surface of the inner mounting ring 3, an injection cap 5 is fixedly provided on one end of the extraction kettle 4 by bolts, and an injection valve port 6 is fixedly provided on the outer surface of the injection cap 5 at the end facing away from the extraction kettle 4, a drying cap 7 is fixedly provided on the other end of the extraction kettle 4 by bolts, and an output valve port 8 is fixedly provided on the outer surface of the drying cap 7 at the end facing away from the extraction kettle 4, and the interior of the drying cap 7 is filled with a desiccant, an air hole is provided on the side surface of the injection cap 5 at one end facing the extraction kettle 4, and air holes are provided on the side surfaces of both ends of the drying cap 7;

[0044] A second electric push rod 19 is fixedly provided on the outer surface of the outer mounting ring 2, and a rotating electric heating plate 20 is installed on the side surface of the second electric push rod 19 facing the extraction kettle 4. The electric heating plate 20 is designed to be arc-shaped, and a spring is connected between the outer surface of the electric heating plate 20 and one end of the second electric push rod 19, and the inner surface of the electric heating plate 20 is in contact with the outer surface of the extraction kettle 4;

[0045] During normal processing, the injection cover 5 is opened and the material to be extracted is placed into the extraction kettle 4, and then the injection cover 5 is fixed to the extraction kettle 4. When the fluid is injected into the extraction kettle 4 through the injection valve port 6 and the injection cover 5, the raw material is extracted. The extracted gas is dried by the desiccant inside the drying cover 7 and then output through the output valve port 8. During the process, the second electric push rod 19 is started to drive the electric heating plate 20 to slide toward the extraction kettle 4. The end of the electric heating plate 20 connected to the second electric push rod 19 is squeezed by the outer surface of the extraction kettle 4, causing the two electric heating plates 20 to rotate to form a semi-ring. The purpose of heating the extraction kettle 4 by the electric heating plate 20 is achieved by closing the upper and lower semi-rings.

[0046] Example 2: Based on Example 1, this example discloses that a flip switching mechanism is provided on the surface of the outer mounting ring 2, thereby improving the overall processing efficiency by switching the extraction in two kettles;

[0047] The flip switching mechanism includes: a drive motor 9, which is fixedly mounted on the outer surface of the outer mounting ring 2, and one end of the output shaft of the drive motor 9 is fixedly connected to a drive gear 10, a mounting base 11 is fixedly provided on the outer surface of the outer mounting ring 2, and a rotatable movable rod 12 is installed on the end of the mounting base 11 connected to the outer mounting ring 2, a fluid connector 13 is fixedly mounted on one side surface of the movable rod 12 facing the extraction kettle 4, and a sealing disk 14 is fixedly mounted on the other side surface of the movable rod 12 facing the extraction kettle 4, a first electric push rod 15 is fixedly mounted on the upper surface of the end of the mounting base 11 away from the outer mounting ring 2, and the first electric push rod 15 is fixedly connected to an extrusion frame 16 on one end facing the outer mounting ring 2, and the extrusion frame 16 is fixedly connected to a clamping rod 17 on one end facing the outer mounting ring 2, and a limiting groove 18 is provided on the outer surface of the inner mounting ring 3;

[0048] The outer surface of the inner mounting ring 3 is evenly and fixedly provided with tooth blocks, and the inner mounting ring 3 is meshed and connected with the driving gear 10 through the tooth blocks;

[0049] A spring is connected between the movable rod 12 and the mounting base 11. The outer surface of the sealing disk 14 is in contact with one end surface of the injection cover 5 and the drying cover 7, and the sealing disk 14 is connected to one end of the fluid connector 13.

[0050] The extrusion frame 16 is designed in a C-shape, and the two ends of the extrusion frame 16 are respectively fitted with the movable rods 12 on both sides. One end of the clamping rod 17 is designed in an isosceles trapezoidal shape, and the end of the clamping rod 17 is designed to penetrate the inner surface of the outer mounting ring 2 and is clamped and installed in the limiting groove 18;

[0051] After the processing is completed, the drive motor 9 is started. The drive motor 9 drives the inner mounting ring 3 to rotate relative to the outer mounting ring 2 fixed on the support base 1 through the engagement of the drive gear 10 with the inner mounting ring 3, so that the two extraction kettles 4 exchange positions. Then the first electric push rod 15 on the mounting base 11 is started to drive the extrusion frame 16 and the clamping rod 17 to slide toward the extraction kettle 4. At this time, the clamping rod 17 is engaged with the limiting groove 18 to fix the relative positions of the inner mounting ring 3 and the outer mounting ring 2, and the extrusion frame 16 squeezes the movable rod 12 to make the two sealing disks 14 respectively fit with the injection valve port 6 and the output valve port 8 to achieve sealing, and then connects to the intake and exhaust pipes respectively through the fluid connector 13.

[0052] Example 3: Based on Example 1 and Example 2, this example discloses that a pressure unsealing mechanism is provided inside the injection cap 5, which is opened by applying pressure to avoid burns caused by the outflow of high-temperature gas when replacing raw materials;

[0053] The pressure unsealing mechanism includes a closing plate 21, which is slidably mounted inside the injection cap 5, and a first fixing plate 22 is fixedly provided on the outer surface of the closing plate 21, and a second fixing plate 23 is fixedly provided on the inner surface of the injection cap 5 on one side of the first fixing plate 22. An air hole is provided on the outer surface of the closing plate 21, and a center rod 24 is fixedly mounted on one end of the closing plate 21 facing the injection valve port 6, and one end of the center rod 24 is rotatably connected to the injection valve port 6, and a sliding sliding rod 25 is installed on the end of the center rod 24 rotatably connected to the injection valve port 6, and a piston plate 26 is fixedly connected to the end of the sliding rod 25 facing away from the center rod 24, and a twisted rod 27 is fixedly provided on the side surface of the piston plate 26, a piston cylinder 28 is fixedly provided on the inner surface of the injection valve port 6, and a clamping rod 29 is fixedly provided on the inner surface of the piston cylinder 28;

[0054] The air holes on the surface of the closing plate 21 are offset from the air holes on the outer surface of the injection cover 5 facing the extraction kettle 4, and the outer surface of the closing plate 21 is in contact with the inner surface of the injection cover 5. The first fixing plate 22 and the second fixing plate 23 are offset, and a spring is connected between the first fixing plate 22 and the second fixing plate 23.

[0055] A spring is connected between the center rod 24 and the sliding rod 25, the piston plate 26 and the piston cylinder 28 are connected by sliding friction, the twisted rod 27 is engaged with the clamping rod 29, and the center rod 24, the sliding rod 25, the piston plate 26 and the twisted rod 27 are all concentrically arranged;

[0056] When the fluid is injected through the fluid connector 13 and the sealing disk 14 through the injection valve port 6, the pressure pushes the piston plate 26 inside the piston cylinder 28 to slide, causing the twisted rod 27 to move relative to the clamping rod 29. The clamping rod 29 drives the twisted rod 27 to rotate by engaging with the twisted rod 27. The twisted rod 27 drives the center rod 24 to rotate through the piston plate 26 and the sliding rod 25. The center rod 24 drives the closing plate 21 to rotate and compresses the spring between the first fixed plate 22 and the second fixed plate 23, so that the pores on the surface of the closing plate 21 are aligned with the injection cap 5. The air holes on the inner surfaces overlap to realize fluid injection. After the extraction is completed and the fluid injection is stopped, the extraction kettle 4 is driven to rotate away from the mounting base 11. At this time, since the piston plate 26 loses the pressure push, it slides and returns to its original position under the support of the spring between the sliding rod 25 and the center rod 24, and the closing plate 21 is also returned to its original position under the support of the spring between the first fixed plate 22 and the second fixed plate 23, so that the air holes on the surface of the closing plate 21 and the air holes on the inner surface of the injection cover 5 are misaligned, thereby avoiding steam overflowing from the extraction kettle 4 and causing burns when the injection cover 5 is removed.

[0057] The above specific embodiments further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and do not limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A double-kettle flip-type supercritical fluid extraction device, comprising a support base (1), an outer mounting ring (2) is fixedly arranged in the middle of the upper surface of the support base (1), and a rotating inner mounting ring (3) is installed on the inner surface of the outer mounting ring (2), characterized in that: An extraction kettle (4) is fixedly arranged on the inner surface of the inner mounting ring (3); an injection cap (5) is fixedly arranged on one end of the extraction kettle (4) by means of bolts, and an injection valve port (6) is fixedly arranged on the outer surface of the end of the injection cap (5) facing away from the extraction kettle (4); a drying cap (7) is fixedly arranged on the other end of the extraction kettle (4) by means of bolts, and an output valve port (8) is fixedly arranged on the outer surface of the end of the drying cap (7) facing away from the extraction kettle (4), and the interior of the drying cap (7) is filled with a desiccant; an air hole is provided on the side surface of one end of the injection cap (5) facing the extraction kettle (4), and air holes are provided on the side surfaces of both ends of the drying cap (7); a flip switching mechanism is provided on the surface of the outer mounting ring (2), and the overall processing efficiency is improved by switching extraction of double kettles.

2. A double-kettle flip-type supercritical fluid extraction device according to claim 1, characterized in that: The flip switching mechanism comprises: a driving motor (9), the driving motor (9) being fixedly mounted on the outer surface of the outer mounting ring (2), and one end of the output shaft of the driving motor (9) being fixedly connected to a driving gear (10), a mounting base (11) being fixedly arranged on the outer surface of the outer mounting ring (2), and a rotatable movable rod (12) being mounted on one end of the mounting base (11) connected to the outer mounting ring (2), and a fluid connector (13) being fixedly mounted on one side surface of one end of the movable rod (12) facing the extraction kettle (4) ), and a sealing disk (14) is fixedly mounted on the other side surface of one end of the movable rod (12) facing the extraction kettle (4), a first electric push rod (15) is fixedly mounted on the upper surface of one end of the mounting base (11) away from the outer mounting ring (2), and an extrusion frame (16) is fixedly connected to one end of the first electric push rod (15) facing the outer mounting ring (2), and a clamping rod (17) is fixedly connected to one end of the extrusion frame (16) facing the outer mounting ring (2), and a limiting groove (18) is provided on the outer side surface of the inner mounting ring (3).

3. A double-kettle flip-type supercritical fluid extraction device according to claim 1, characterized in that: A second electric push rod (19) is fixedly arranged on the outer surface of the outer mounting ring (2), and a rotatable electric heating plate (20) is installed on the side surface of one end of the second electric push rod (19) facing the extraction kettle (4). The electric heating plate (20) is designed to be arc-shaped, and a spring is connected between the outer surface of the electric heating plate (20) and one end of the second electric push rod (19), and the inner surface of the electric heating plate (20) is in contact with the outer surface of the extraction kettle (4).

4. A double-kettle flip-type supercritical fluid extraction device according to claim 1, characterized in that: The injection cap (5) is provided with a pressure unsealing mechanism inside, which opens by applying pressure to avoid burns caused by the outflow of high-temperature gas when replacing raw materials.

5. A double-kettle tumbling supercritical fluid extraction device according to claim 4, characterized in that: The pressure unsealing mechanism comprises a closing plate (21), the closing plate (21) being slidably mounted inside the injection cap (5), and a first fixing plate (22) being fixedly mounted on the outer surface of the closing plate (21), and a second fixing plate (23) being fixedly mounted on the inner surface of the injection cap (5) on one side of the first fixing plate (22), an air hole being formed on the outer surface of the closing plate (21), and a center rod (24) being fixedly mounted on one end of the closing plate (21) facing the injection valve port (6), and the center rod (23) One end of the center rod (24) is rotatably connected to the injection valve port (6), and a sliding rod (25) is installed at one end of the center rod (24) rotatably connected to the injection valve port (6), and one end of the sliding rod (25) that is rotatably connected to the injection valve port (6) is fixedly connected to a piston plate (26) at one end of the sliding rod (25) that is away from the center rod (24), and a twisted rod (27) is fixedly provided on the side surface of the piston plate (26), and a piston cylinder (28) is fixedly provided on the inner surface of the injection valve port (6), and a clamping rod (29) is fixedly provided on the inner surface of the piston cylinder (28).

6. A double-kettle flipping supercritical fluid extraction device according to claim 2, characterized in that: The outer surface of the inner mounting ring (3) is evenly and fixedly provided with tooth blocks, and the inner mounting ring (3) is meshedly connected with the driving gear (10) via the tooth blocks.

7. The double-kettle flip-type supercritical fluid extraction device according to claim 2, characterized in that: A spring is connected between the movable rod (12) and the mounting base (11); the outer surface of the sealing disk (14) is in contact with one end surface of the injection cover (5) and the drying cover (7); and the sealing disk (14) is in communication with one end of the fluid connector (13).

8. The double-kettle flipping supercritical fluid extraction device according to claim 2, characterized in that: The extrusion frame (16) is designed in a C shape, and the two ends of the extrusion frame (16) are respectively fitted with the movable rods (12) on both sides, and one end of the clamping rod (17) is designed in an isosceles trapezoidal shape, and the end of the clamping rod (17) with an isosceles trapezoidal design passes through the inner surface of the outer mounting ring (2) and is clamped and installed in the limiting groove (18).

9. The double-kettle flipping supercritical fluid extraction device according to claim 5, characterized in that: The air holes on the surface of the closing plate (21) are offset from the air holes on the outer surface of the injection cover (5) at one end facing the extraction kettle (4), and the outer surface of the closing plate (21) is in contact with the inner surface of the injection cover (5). The first fixing plate (22) and the second fixing plate (23) are offset from each other, and a spring is connected between the first fixing plate (22) and the second fixing plate (23).

10. The double-kettle flipping supercritical fluid extraction device according to claim 5, characterized in that: A spring is connected between the center rod (24) and the sliding rod (25); the piston plate (26) and the piston cylinder (28) are connected by sliding friction; the twisted rod (27) and the clamping rod (29) are clamped and installed; the center rod (24), the sliding rod (25), the piston plate (26) and the twisted rod (27) are all concentrically arranged.

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