High safety sealing structure for supercritical extraction equipment

Abstract

The utility model discloses a high security sealing structure for supercritical extraction equipment applied to the sealing structure field of extraction equipment, including the reaction kettle body and the reaction kettle end cover of setting at the top of reaction kettle body, the top surface fixed setting of reaction kettle end cover has the central location component, and the reaction kettle end cover can be through drive module and central location component and lift along the axis direction of reaction kettle body and move, realize the automatic pressure, simultaneously, through the central location component including the equal angle distribution's locating rod about the axis of reaction kettle end cover, when the reaction kettle end cover is in the open and close state, through multiple locating rods to the reaction kettle end cover is limited, makes the reaction kettle end cover in the open and close process and moves along the axis direction of reaction kettle body and keeps the reaction kettle end cover and reaction kettle body center alignment, avoids the reaction kettle end cover and the reaction kettle body to have the center deviation in the open and close process for many times and influences the airtightness, and then reaches better sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of sealing structures for extraction equipment, and in particular to a high-safety sealing structure for supercritical extraction equipment. Background Technology

[0002] Supercritical fluid extraction equipment is a highly efficient separation device that uses supercritical fluids, such as carbon dioxide, as extractants to selectively extract target components from solid or liquid materials under high pressure and appropriate temperature. Since supercritical fluid extraction equipment needs to process highly permeable fluids under high pressure, its sealing system is the core to ensure safe and efficient operation.

[0003] Existing technologies, such as the utility model patent with Chinese patent authorization announcement number CN223152753U, disclose a sealing structure for a supercritical extraction device, including a reaction vessel. An end cap is fitted onto the outer end of the reaction vessel, and a fixing ring is fixedly connected to the bottom end of the end cap. A sealing groove is opened at the outer end of the fixing ring, and a sealing ring is rotatably connected to the inner wall of the sealing groove. A movable sealing component is fixedly connected to the bottom end of the fixing ring. This structure uses an elastic corrugated sealing ring, a sealing ring, and a movable sealing component to form a multi-layer seal. The movable sealing component automatically adjusts the sealing force using the system pressure through the cooperation of the first and second annular cavities and the pressure boosting ring. The heat-absorbing expansion liquid in the liquid storage ring can automatically compensate for the gaps caused by thermal expansion and contraction.

[0004] However, most of the supercritical fluid extraction equipment currently on the market is prone to relative misalignment between the end cap and the vessel body during repeated opening and closing, which leads to the failure of the sealing structure and makes it difficult to effectively seal the end cap and the vessel body. Therefore, we propose a high-safety sealing structure for supercritical fluid extraction equipment to solve the problems mentioned above. Utility Model Content

[0005] The core of this invention lies in using a central positioning component to maintain the center alignment of the reactor body and the reactor end cap during opening and closing. This solves the problem in existing supercritical extraction equipment where the end cap and reactor body easily shift during repeated opening and closing, leading to difficulties in effectively sealing the end cap and reactor body. Simultaneously, it reduces wear on the sealing ring, effectively improving the sealing performance between the end cap and reactor body.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A high-safety sealing structure for supercritical fluid extraction equipment includes a reactor body and a reactor end cover located at the top of the reactor body. A support device is provided on the outside of the reactor body, and the support device includes a lateral support frame and a mounting frame fixedly installed on the top of the lateral support frame. The reactor body is fixedly installed inside the lateral support frame. A drive module is fixedly installed on the lower end face of the mounting frame through a bracket structure. A central positioning component is fixedly provided on the top face of the reactor end cover. The central positioning component includes positioning rods that are evenly distributed at angles about the axis of the reactor end cover. The reactor end cover moves up and down along the axis of the reactor body through the central positioning component.

[0008] A first sealing ring is provided on the top surface of the reactor body, and a second sealing ring that cooperates with the first sealing component is fixedly connected to the bottom surface of the reactor end cover.

[0009] The drive module is an electric drive module, which includes a servo motor. The output end of the servo motor is fixedly connected to a drive wheel, and the drive wheel is coaxially arranged with the reactor end cover. A driven wheel is meshed with the outer side of the drive wheel. The center positioning component also includes a first limiting frame fixedly installed on the outer end face of the lateral support frame. The first limiting frame is rotatably connected to the driven wheel through a bearing structure and provides support for the driven wheel.

[0010] Furthermore, the positioning rod is a connecting rod, and the driven wheel is configured to cooperate with the connecting rod. The outer surface of the connecting rod is fixedly connected with a convex thread structure, and the driven wheel has a through hole structure inside, and the inner surface of the through hole structure has a concave thread structure that cooperates with the connecting rod.

[0011] Alternatively, the drive module can be a hydraulic telescopic rod, with the output end of the hydraulic telescopic rod fixedly connected to the top surface of the reactor end cover.

[0012] Furthermore, the positioning rod is a connecting rod, and the central positioning component also includes a second limiting frame fixedly installed on the outer end face of the lateral support frame. One end of the connecting rod is inserted through the second limiting frame, and the connecting rod and the second limiting frame form a sliding connection.

[0013] Furthermore, the reactor end cover is recessed in the middle, and the top surface of the reactor body is provided with an inclined structure that matches the recessed surface of the reactor end cover. A sealing ring is connected between the inclined structure and the reactor end cover, and the sealing ring is fitted between the reactor body and the reactor end cover.

[0014] Furthermore, the top surface of the reactor body is provided with a groove structure that mates with the first sealing ring, and the first sealing ring is movably disposed inside the groove structure. A spring is provided on the inner side of the first sealing ring to support it.

[0015] Furthermore, both the outer surface of the first sealing ring facing the second sealing ring and the outer surface of the second sealing ring facing the first sealing ring are provided with arc-shaped protrusions, and the arc-shaped protrusions on the outer surfaces of the first and second sealing rings cooperate with each other by staggered arrangement.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. This solution uses a center positioning component fixedly installed on the top surface of the reactor end cover. The center positioning component allows the reactor end cover to move up and down along the axis of the reactor body, thereby keeping the reactor end cover and the reactor body aligned in the center during opening and closing. This enables automated pressing and prevents the end cover from shifting in center with the reactor body during repeated opening and closing, thus achieving a better sealing effect.

[0018] 2. This solution uses a recessed design in the middle of the reactor end cover, with the sealing ring fitted between the reactor body and the reactor end cover. Simultaneously, when the reactor end cover is pressed down and closed with the reactor body, the arc-shaped protrusions on the outer surfaces of the first and second sealing rings engage and press against each other in an alternating manner, enhancing the sealing effect. In this invention, the axial compression positioning method avoids torsional friction during opening and closing of the sealing ring, reducing wear caused by traditional threaded rotation and extending its lifespan. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the overall structure of the reactor body and reactor end cap in a cross-section state according to the first embodiment of this utility model;

[0021] Figure 3 This is a schematic diagram of the exploded structure of the driven wheel and the first limiting frame in the first embodiment of this utility model;

[0022] Figure 4 This utility model Figure 2 Enlarged structural diagram at point A in the diagram;

[0023] Figure 5 This utility model Figure 2 Enlarged structural diagram at point B in the diagram;

[0024] Figure 6 This is a schematic diagram of the overall structure of the second embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the second limiting frame in a partially cut-out state in the second embodiment of this utility model.

[0026] Explanation of the labels in the diagram:

[0027] 1. Reactor body; 2. Reactor end cover; 3. Support device; 4. Electric drive module; 41. Servo motor; 42. Drive wheel; 43. Driven wheel; 44. Connecting rod; 45. First limiting frame; 5. Sealing ring; 6. First sealing ring; 7. Second sealing ring; 8. Spring; 9. Hydraulic telescopic rod; 10. Second limiting frame; 11. Connecting rod. Detailed Implementation

[0028] The technical solution will now be clearly and completely described with reference to the accompanying drawings in the embodiments of this utility model.

[0029] First implementation method:

[0030] Please see Figure 1 and Figure 2 As shown, a high-safety sealing structure for a supercritical fluid extraction device includes a reactor body 1 and a reactor end cap 2 located at the top of the reactor body 1. A support device 3 is provided on the outside of the reactor body 1, and the support device 3 includes a lateral support frame and a mounting bracket fixedly installed on the top of the lateral support frame. The reactor body 1 is fixedly installed inside the lateral support frame, and a drive module is fixedly installed on the lower end face of the mounting bracket through a bracket structure. Specifically, as shown... Figure 2 and Figure 5 As shown, the drive module is an electric drive module 4, which includes a servo motor 41. The output end of the servo motor 41 is fixedly connected to a drive wheel 42, and the drive wheel 42 is coaxially arranged with the reactor end cover 2. The drive wheel 42 can be driven to rotate by the servo motor 41.

[0031] Specific examples Figure 2 and Figure 5 As shown, a central positioning assembly is fixedly installed on the top surface of the reactor end cover 2. The reactor end cover 2 can move up and down along the axis of the reactor body 1 via the central positioning assembly. In this embodiment, the driven wheel 43 is meshed with the outer side of the driving wheel 42. The central positioning assembly includes positioning rods evenly distributed about the axis of the reactor end cover 2, and the positioning rods are connecting rods 44. Figure 2 and Figure 3As shown, the outer surface of the connecting rod 44 is fixedly connected with a convex thread structure. At the same time, the driven wheel 43 has a through hole structure inside, and the inner surface of the through hole structure has a concave thread structure that cooperates with the connecting rod 44. The driving wheel 42 can drive multiple driven wheels 43 to rotate synchronously. Since the center positioning component also includes a first limiting frame 45 fixedly installed on the outer end face of the side support frame, and the first limiting frame 45 is rotatably connected to the driven wheel 43 through a bearing structure and provides support for the driven wheel 43, the first limiting frame 45 limits the driven wheel 43 so that when the driven wheel 43 rotates, the connecting rod 44 can rise and fall inside the driven wheel 43 and drive the reactor end cover 2 to move along the axial direction of the reactor body 1, thereby opening and closing the reactor body 1 and the reactor end cover 2.

[0032] Furthermore, the reactor end cap 2 is recessed in the middle, specifically as follows: Figure 4 As shown, the top surface of the reactor body 1 is provided with an inclined structure that matches the sunken surface of the reactor end cover 2, and a sealing ring 5 is connected between the inclined structure and the reactor end cover 2. When the reactor end cover 2 is pressed down and closed with the reactor body 1, the sealing ring 5 is fitted between the reactor body 1 and the reactor end cover 2, and plays a sealing role between the reactor body 1 and the reactor end cover 2.

[0033] Furthermore, a first sealing ring 6 is provided on the top surface of the reactor body 1, and a second sealing ring 7, which cooperates with the first sealing assembly, is fixedly connected to the bottom surface of the reactor end cover 2, as detailed below. Figure 4 As shown, the top surface of the reactor body 1 has a groove structure that mates with the first sealing ring 6, and the first sealing ring 6 is movably disposed inside the groove structure. A spring 8 is provided inside the first sealing ring 6 to support it. The springs 8 are evenly distributed circumferentially inside the first sealing ring 6. Simultaneously, arc-shaped protrusions are provided on the outer surfaces of both the first sealing ring 6 and the second sealing ring 7. When the reactor end cap 2 is pressed down and closed with the reactor body 1, the arc-shaped protrusions on the outer surfaces of the first and second sealing rings 6 engage and press against each other in an alternating manner, effectively sealing the gap between the reactor body 1 and the reactor end cap 2. Furthermore, the elastic force generated by the pressure of the springs 8 further tightens the second sealing ring 7 against the first sealing ring 6, enhancing the sealing effect.

[0034] Working Principle: When using the high-safety sealing structure of this supercritical extraction equipment, the servo motor 41 first drives the drive wheel 42 to rotate. Since the drive wheel 42 is meshed with the driven wheel 43, the drive wheel 42 can drive multiple driven wheels 43 to rotate synchronously. Simultaneously, the first limiting frame 45 limits the driven wheels 43, allowing the connecting rod 44 to rise and fall inside the driven wheels 43 as they rotate, thus moving the reactor end cover 2 along the axis of the reactor body 1. This opens and closes the reactor body 1 and the reactor end cover 2. Specifically, as shown... Figure 1 and Figure 2 As shown, by synchronously raising and lowering multiple sets of connecting rods 44, the reactor end cover 2 can be effectively limited, maintaining the center positioning effect of the reactor end cover 2 during the opening and closing process.

[0035] Second implementation method:

[0036] Please see Figure 6 and Figure 7 As shown, unlike the first embodiment, in this embodiment, the drive module is a hydraulic telescopic rod 9, the output end of the hydraulic telescopic rod 9 is fixedly connected to the top surface of the reactor end cover 2, and the center positioning component also includes a second limiting frame 10 fixedly installed on the outer end surface of the lateral support frame. The positioning rod is a connecting rod 11, and one end of the connecting rod 11 is inserted through the second limiting frame 10, and the connecting rod 11 and the second limiting frame 10 form a sliding connection.

[0037] Working principle: The hydraulic telescopic rod 9 drives the reactor end cover 2 to rise and fall on top of the reactor body 1, as detailed below. Figure 6 and Figure 7 As shown, when the reactor end cover 2 is lifted and closed at the top of the reactor body 1, the connecting rod 11 moves up and down inside the second limiting frame 10. Through the limiting action between the second limiting frame 10 and the connecting rod 11, the reactor end cover 2 can be effectively positioned, maintaining the center positioning effect of the reactor end cover 2 during the opening and closing process, avoiding the reactor end cover 2 from shifting the center from the reactor body 1 during multiple opening and closing processes, and improving the closing and sealing effect.

[0038] The above are merely preferred embodiments of this utility model; they encompass all the protection scope of this utility model. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be covered within the protection scope of this utility model.

Claims

1. A high-safety sealing structure for a supercritical extraction device, comprising a reactor kettle body (1) and a reactor kettle end cover (2) arranged at the top end of the reactor kettle body (1), characterized in that: A support device (3) is provided on the outside of the reactor body (1), and the support device (3) includes a lateral support frame and a mounting frame fixedly installed on the top of the lateral support frame. The reactor body (1) is fixedly installed inside the lateral support frame. A drive module is fixedly installed on the lower end face of the mounting frame through a bracket structure. A center positioning component is fixedly provided on the top surface of the reactor end cover (2). The center positioning component includes positioning rods that are equally distributed about the axis of the reactor end cover (2). The reactor end cover (2) moves up and down along the axis of the reactor body (1) through the center positioning component. The top surface of the reactor body (1) is provided with a first sealing ring (6), and the bottom surface of the reactor end cover (2) is fixedly connected with a second sealing ring (7) that cooperates with the first sealing component. The drive module is an electric drive module (4), which includes a servo motor (41). The output end of the servo motor (41) is fixedly connected to a drive wheel (42), and the drive wheel (42) is coaxially arranged with the reactor end cover (2). The outer side of the drive wheel (42) is meshed with a driven wheel (43). The center positioning component also includes a first limiting frame (45) fixedly installed on the outer end face of the lateral support frame. The first limiting frame (45) is rotatably connected to the driven wheel (43) through a bearing structure and provides support for the driven wheel (43).

2. The high safety sealing structure for a supercritical extraction apparatus according to claim 1, characterized by: The positioning rod is a connecting rod (44), and the driven wheel (43) is configured to cooperate with the connecting rod (44). The outer surface of the connecting rod (44) is fixedly connected with a convex thread structure. The driven wheel (43) has a through hole structure inside, and the inner surface of the through hole structure has a concave thread structure that cooperates with the connecting rod (44).

3. The high safety sealing structure for supercritical extraction apparatus according to claim 1, wherein: The drive module is a hydraulic telescopic rod (9), and the output end of the hydraulic telescopic rod (9) is fixedly connected to the top surface of the reactor end cover (2).

4. The high-safety sealing structure for a supercritical extraction device according to claim 3, characterized in that: The positioning rod is a connecting rod (11), and the central positioning component also includes a second limiting frame (10) fixedly installed on the outer end face of the lateral support frame. One end of the connecting rod (11) is inserted through the second limiting frame (10), and the connecting rod (11) and the second limiting frame (10) form a sliding connection.

5. The high safety sealing structure for supercritical extraction equipment according to claim 1 or 4, characterized in that: The reactor end cap (2) is recessed in the middle. The top surface of the reactor body (1) is provided with an inclined structure that matches the recessed surface of the reactor end cap (2). A sealing ring (5) is connected between the inclined structure and the reactor end cap (2). The sealing ring (5) is fitted between the reactor body (1) and the reactor end cap (2).

6. The high safety sealing structure for a supercritical extraction apparatus according to claim 5, wherein: The top surface of the reactor body (1) is provided with a groove structure that cooperates with the first sealing ring (6), and the first sealing ring (6) is movably disposed inside the groove structure. A spring (8) is provided on the inner side of the first sealing ring (6) to support the first sealing ring (6).

7. The high safety sealing structure for a supercritical extraction apparatus according to claim 6, wherein: The outer surface of the first sealing ring (6) facing the second sealing ring (7) and the outer surface of the second sealing ring (7) facing the first sealing ring (6) are both provided with arc-shaped protrusions, and the arc-shaped protrusions on the outer surfaces of the first sealing ring (6) and the second sealing ring (7) cooperate with each other by staggered arrangement.

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