Composite sealing assembly and Soxhlet extractor

Abstract

The utility model provides a composite sealing assembly and a Soxhlet extractor, and relates to the field of Soxhlet extractors. The composite sealing assembly comprises a corrosion-resistant sealing piece and an inner-layer sealing piece. The corrosion-resistant sealing element is sleeved with the inner-layer sealing element, and the inner wall of the corrosion-resistant sealing element is attached to the outer wall of the inner-layer sealing element; the corrosion-resistant sealing piece is provided with an opening, and the opening extends in the length direction of the corrosion-resistant sealing piece. The inner-layer sealing piece is elastic. The composite sealing assembly solves the technical problems that in the prior art, a sealing structure of a Soxhlet extractor is complex in operation and cannot be matched with an automatic device.

Description

Technical Field

[0001] This application relates to the field of Soxhlet extractors, and more specifically, to a composite sealing assembly and a Soxhlet extractor. Background Technology

[0002] A Soxhlet extractor consists of a flask, an extractor, and a condenser. The extractor has a siphon tube and a connecting tube on its side wall. When using a Soxhlet extractor, the sample to be tested is wrapped in defatted filter paper and placed inside the extractor. An organic solvent, such as petroleum ether, is added to the flask. The flask is heated, and the organic solvent vaporizes, rising through the connecting tube into the condenser, where it condenses and drips into the extractor, extracting the organic compounds from the sample. Once the organic solvent level in the extractor reaches a certain height, the organic solvent containing the dissolved organic compounds flows back into the flask through the siphon tube. The organic solvent flowing into the flask continues to be heated, vaporized, rising, and condensed, dripping into the extractor. This cycle is repeated until extraction is complete.

[0003] All connections in the Soxhlet extractor must be airtight and leak-proof. See [link / reference]. Figure 1 In existing Soxhlet extractors, the condenser and extractor, as well as the extractor and flask, are sealed with frosted glass joints. The sealing material is glass, and the sealing method is an internal and external frosted glass joint seal. After the experiment, this sealing method makes it difficult to separate the seals. It requires manual rotation of one of the glass components and lifting to separate the two glass components, which is complicated to operate and cannot be integrated with automated devices. Utility Model Content

[0004] The purpose of this application is to provide a composite sealing assembly and a Soxhlet extractor to alleviate the technical problems of the existing Soxhlet extractor's sealing structure being complex to operate and unable to be integrated with automated devices.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] In the first aspect, the composite sealing assembly provided by this utility model includes a corrosion-resistant sealing element and an inner sealing element;

[0007] The corrosion-resistant seal is fitted over the inner seal, and the inner wall of the corrosion-resistant seal is in contact with the outer wall of the inner seal.

[0008] Furthermore, the corrosion-resistant seal has an opening, and the opening extends along the length of the corrosion-resistant seal;

[0009] The inner sealing element is elastic.

[0010] Furthermore, the cross-section of the corrosion-resistant seal is annular with an opening, and the angle of the opening is set to 45°-90°.

[0011] Furthermore, both the inner sealing element and the corrosion-resistant sealing element are ring-shaped, and the opening of the corrosion-resistant sealing element is located on the outer side of the corrosion-resistant sealing element.

[0012] Furthermore, the cross-section of the corrosion-resistant seal is provided with a reference line, and the angle between the reference line and the center line of the corrosion-resistant seal is set to 45°;

[0013] The opening is symmetrically arranged about the baseline.

[0014] Furthermore, the inner seal has a circular cross-section.

[0015] Furthermore, the Shore hardness of the inner seal is set to 50-60HA.

[0016] Secondly, this utility model provides a Soxhlet extractor, including a flask, an extractor, a condenser, and a composite sealing assembly as described in any of the above.

[0017] The composite sealing assembly is installed between the extractor and the flask, and the composite sealing assembly is installed between the extractor and the condenser.

[0018] Furthermore, the bottom outer wall of both the extractor and the condenser is provided with a limiting component, and the top outer wall of both the extractor and the flask is provided with a limiting protrusion, the inner wall of which is set as a slope or arc shape.

[0019] The composite sealing assembly is sandwiched between the limiting assembly and the inner wall of the limiting protrusion.

[0020] Furthermore, the limiting component includes a first protrusion and a second protrusion, the first protrusion and the second protrusion being spaced apart along the axial direction of the extractor, and the composite sealing component being located between the first protrusion and the second protrusion.

[0021] Furthermore, the second protrusion is located below the first protrusion, and the surface of the second protrusion facing away from the first protrusion is set as an inclined surface.

[0022] Based on the above technical solutions, the technical effects achievable by this utility model can be analyzed as follows:

[0023] The composite sealing assembly provided by this utility model includes a corrosion-resistant sealing element and an inner sealing element; the corrosion-resistant sealing element is fitted over the inner sealing element, and the inner wall of the corrosion-resistant sealing element is in contact with the outer wall of the inner sealing element; the corrosion-resistant sealing element has an opening, and the opening extends along the length direction of the corrosion-resistant sealing element; the inner sealing element is elastic.

[0024] This composite sealing assembly can be used in instruments requiring sealing, such as Soxhlet extractors, to achieve a sealing effect. To use this assembly, install it on the outer wall of one container, then place the container with the composite sealing assembly inside another container, with the assembly sandwiched between the two containers. To separate the two containers, simply lift the container with the composite sealing assembly installed.

[0025] The corrosion-resistant seal is fitted over an inner seal. The corrosion-resistant seal acts as a corrosion protectant, preventing the inner seal from contacting corrosive substances such as organic solvents, thus ensuring a proper seal. The corrosion-resistant seal has an opening that allows it to deform under pressure. Furthermore, the inner seal can be inserted into the corrosion-resistant seal layer through this opening, facilitating its installation and replacement. The inner seal is elastic, deforming under external force to achieve a seal. It also provides support to the corrosion-resistant seal, returning to its original shape when no force is applied, which in turn allows the corrosion-resistant seal to return to its original shape as well.

[0026] This composite sealing assembly not only achieves a sealing function but is also resistant to organic solvents. Furthermore, it is easy to operate, requires no manual disassembly, and can be used in conjunction with automated devices. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the Soxhlet extractor in the background art;

[0029] Figure 2 This is a schematic diagram of the structure of the composite sealing assembly provided in the embodiments of this application;

[0030] Figure 3 This is a schematic diagram illustrating the use of the composite sealing assembly provided in the embodiments of this application;

[0031] Figure 4 This is a schematic diagram of the Soxhlet extractor provided in the embodiments of this application;

[0032] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0033] icon:

[0034] 100 - Corrosion-resistant seal; 110 - Opening; 120 - Baseline; 130 - Centerline;

[0035] 200 - Inner seal;

[0036] 310 - Flask; 320 - Extractor; 330 - Condenser; 340 - Limiting component; 341 - First protrusion; 342 - Second protrusion; 350 - Limiting protrusion. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] Example 1

[0041] Sealing is crucial for Soxhlet extractors; it must be able to withstand the organic solvents used while also providing a good seal. (See also...) Figure 1 The existing frosted sealing method has the problem that the seal is not easy to separate after the experiment and therefore cannot be automated.

[0042] In view of this, see Figure 2The composite sealing assembly provided in this embodiment of the present invention includes a corrosion-resistant seal 100 and an inner seal 200; the corrosion-resistant seal 100 is fitted over the inner seal 200, and the inner wall of the corrosion-resistant seal 100 is in contact with the outer wall of the inner seal 200; the corrosion-resistant seal 100 has an opening 110, and the opening 110 extends along the length direction of the corrosion-resistant seal 100; the inner seal 200 is elastic.

[0043] Specifically, in this embodiment, the corrosion-resistant seal 100 is made of polytetrafluoroethylene (PTFE), providing resistance to organic solvents and ensuring that the inner seal 200 does not come into contact with organic solvents, thus preventing corrosion and ensuring a seal. Of course, the corrosion-resistant seal 100 can also be made of FEP or PFA, which should also be within the scope of protection of this embodiment. The inner seal 200 is made of fluororubber, providing elastic deformation to achieve a sealing effect. Furthermore, the Shore hardness of the inner seal 200 is set to 50-60 HA. Fluororubber itself can withstand some organic solvents, and this Shore hardness provides good compressibility, allowing the corrosion-resistant seal 100 to undergo a certain amount of deformation to ensure a seal. Of course, the inner seal 200 can also be made of silicone rubber or EPDM, which should also be within the scope of protection of this embodiment.

[0044] This composite sealing assembly can be used in instruments requiring sealing, such as Soxhlet extractors, to achieve a sealing effect. (See also...) Figure 3 When using this composite sealing assembly, install it on the outer wall of one container, and then install the container with the composite sealing assembly inside another container, with the composite sealing assembly sandwiched between the two containers. To separate the two containers, simply lift the container with the composite sealing assembly. The containers are generally made of glass.

[0045] The corrosion-resistant seal 100 is fitted with an inner seal 200. The corrosion-resistant seal 100 serves a corrosion-resistant function, ensuring that the inner seal 200 does not come into contact with corrosive substances such as organic solvents, thus preventing corrosion and maintaining a good seal. The corrosion-resistant seal 100 has an opening 110, which allows it to deform under pressure. Furthermore, the inner seal 200 can be inserted into the corrosion-resistant seal layer through the opening 110, facilitating its installation and replacement. The inner seal 200 is elastic, deforming under external force to achieve a seal. It also provides support for the corrosion-resistant seal 100, returning to its original shape when no external force is applied, which in turn allows the corrosion-resistant seal 100 to return to its original shape as well.

[0046] This composite sealing assembly not only achieves a sealing function but is also resistant to organic solvents. Furthermore, it is easy to operate, requires no manual disassembly, and can be used in conjunction with automated devices.

[0047] The structure and shape of the composite sealing assembly are described in detail below:

[0048] In an optional embodiment of this utility model, the cross-section of the corrosion-resistant seal 100 is annular with an opening 110, and the angle of the opening 110 is set to 45°-90°.

[0049] Specifically, the angle of the opening 110 can be set to 45°, 50°, 60° or 90°. Preferably, the wall thickness of the corrosion-resistant seal 100 is set to 0.25 mm to facilitate deformation of the corrosion-resistant seal 100.

[0050] In this embodiment, see Figure 2 The angle of the opening 110 is set to 60°. This angle allows the opening 110 to occupy 1 / 6 of the corrosion-resistant seal 100. This ensures that the corrosion-resistant seal 100 is easily deformed when the composite sealing assembly is subjected to pressure, while also ensuring that the inner seal 200 does not come into contact with organic solvents. In addition, this angle makes it convenient for the inner seal 200 to be inserted into or removed from the corrosion-resistant seal 100 through the opening 110.

[0051] In the optional embodiments of this utility model, see Figure 2 Both the inner sealing element 200 and the corrosion-resistant sealing element 100 are ring-shaped, and the opening 110 of the corrosion-resistant sealing element 100 is located on the outside of the corrosion-resistant sealing element 100.

[0052] Specifically, the inner sealing element 200 and the corrosion-resistant sealing element 100 are generally circular, meaning their axes are circular. When the inner sealing element 200 and the corrosion-resistant sealing element 100 are circular, the length direction of the corrosion-resistant sealing element 100 is the direction in which its axis extends, so the opening 110 extends along the direction in which the axis of the corrosion-resistant sealing element 100 extends. Of course, the inner sealing element 200 and the corrosion-resistant sealing element 100 can also be elongated, etc., and these should also be within the protection scope of this utility model embodiment. In practice, they can be manufactured according to the shape of the container to be sealed.

[0053] The inner seal 200 and the corrosion-resistant seal 100 are in a ring shape. The opening 110 of the corrosion-resistant seal 100 is located on the outside of the corrosion-resistant seal 100, which further prevents the inner seal 200 from contacting organic solvents and improves the corrosion resistance.

[0054] In the optional embodiments of this utility model, see Figure 2The cross-section of the corrosion-resistant seal 100 is provided with a reference line 120, and the included angle between the reference line 120 and the center line 130 of the corrosion-resistant seal 100 is set to 45°; the opening 110 is symmetrically arranged about the reference line 120.

[0055] Specifically, the centerline 130 of the corrosion-resistant seal 100 is a line that marks the center of the corrosion-resistant seal 100.

[0056] The opening 110 of the corrosion-resistant seal 100 is symmetrically arranged with the reference line 120 as the axis of symmetry. That is, the opening 110 extends from the reference line 120 along the circumference of the corrosion-resistant seal 100 to both sides of the reference line 120, which further avoids the inner seal 200 from contacting organic solvents and improves the corrosion resistance.

[0057] In an optional embodiment of this utility model, the cross-section of the inner sealing element 200 is circular.

[0058] Specifically, in this embodiment, the inner sealing element 200 has a circular cross-section, and the corrosion-resistant sealing element 100 has a corresponding annular cross-section with an opening 110. Of course, the inner sealing element 200 may have a cross-section of other shapes, such as a star shape, which should also be within the protection scope of this utility model embodiment.

[0059] The inner seal 200 has a circular cross-section, meaning it is an O-ring, which facilitates processing and allows the inner seal 200 and the corrosion-resistant seal 100 to fit together tightly.

[0060] The following describes the processing method for composite sealing components:

[0061] The corrosion-resistant seal 100 is first made into a solid ring by molding, then the inside of the solid ring is hollowed out by using a tool, and finally the inner seal 200 is inserted into the prepared corrosion-resistant seal 100 through the opening 110.

[0062] Solid rings formed by molding have the advantage of smooth outer surfaces, which can ensure that the outer surface of the corrosion-resistant seal 100 is smooth, thereby ensuring that the corrosion-resistant seal 100 is in close contact with the two sealed containers and ensuring the sealing effect.

[0063] Example 2

[0064] The Soxhlet extractor provided in this embodiment includes the composite sealing assembly described in Embodiment 1, and therefore also possesses all the beneficial effects of Embodiment 1, which will not be repeated here.

[0065] In the optional embodiments of this utility model, see Figure 4The Soxhlet extractor includes a flask 310, an extractor 320, and a condenser 330; a composite sealing assembly is installed between the extractor 320 and the flask 310, and between the extractor 320 and the condenser 330.

[0066] The extractor 320 is located between the flask 310 and the condenser 330. Both the upper and lower ends of the extractor 320 are equipped with composite sealing components to achieve the sealing of the Soxhlet extractor.

[0067] In an optional embodiment of this utility model, the bottom outer walls of the extractor 320 and the condenser 330 are provided with limiting components 340, and the top outer walls of the extractor 320 and the flask 310 are provided with limiting protrusions 350, and the inner walls of the limiting protrusions 350 are set as inclined surfaces or arc shapes; the composite sealing component is sandwiched between the limiting components 340 and the inner walls of the limiting protrusions 350.

[0068] Specifically, see Figure 4 and Figure 5 Taking the composite sealing assembly installed between the extractor 320 and the flask 310 as an example, the bottom outer wall of the extractor 320 is provided with a limiting component 340, and the top outer wall of the flask 310 is provided with a limiting protrusion 350; when the inner wall of the limiting protrusion 350 is set as a slope, the inner wall of the limiting protrusion 350 gradually slopes towards the inside of the flask 310 from top to bottom; when the inside of the limiting protrusion 350 is set as an arc, the inner wall of the limiting protrusion 350 protrudes outward.

[0069] The inner wall of the limiting protrusion 350 is set as a slope or arc so that the inner wall of the limiting protrusion 350 can compress and support the composite sealing assembly.

[0070] In an optional embodiment of this utility model, the limiting component 340 includes a first protrusion 341 and a second protrusion 342, the first protrusion 341 and the second protrusion 342 are spaced apart along the axial direction of the extractor 320, and the composite sealing component is located between the first protrusion 341 and the second protrusion 342.

[0071] Specifically, taking the composite sealing assembly installed between the extractor 320 and the flask 310 as an example, during installation, the composite sealing assembly is first installed between the first protrusion 341 and the second protrusion 342 of the extractor 320, and then the extractor 320 is installed in the limiting protrusion 350 of the flask 310.

[0072] The first protrusion 341 and the second protrusion 342 are spaced apart and serve to limit the position of the composite sealing assembly.

[0073] In an optional embodiment of this utility model, the second protrusion 342 is located below the first protrusion 341, and the surface of the second protrusion 342 facing away from the first protrusion 341 is set as an inclined surface.

[0074] Specifically, see Figure 5 The protrusion length of the second protrusion 342 is less than that of the first protrusion 341, and the lower surface of the second protrusion 342 gradually slopes towards the interior of the extractor 320 from top to bottom.

[0075] The lower surface of the second protrusion 342 is set as an inclined surface to serve as a guide and avoidance mechanism.

[0076] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0077] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A composite seal assembly, characterized by, The corrosion-resistant seal (100) and the inner layer seal (200) are provided. The corrosion-resistant seal (100) is sleeved on the inner layer seal (200), and the inner wall of the corrosion-resistant seal (100) is attached to the outer wall of the inner layer seal (200). The corrosion-resistant seal (100) has an opening (110) extending along the length direction of the corrosion-resistant seal (100). The inner layer seal (200) is elastic. The cross section of the corrosion-resistant seal (100) is annular with an opening (110), and the angle of the opening (110) is 45°-90°.

2. The composite seal assembly of claim 1, wherein, The inner layer seal (200) and the corrosion-resistant seal (100) are both in the form of a ring, and the opening (110) of the corrosion-resistant seal (100) is located on the outer side of the corrosion-resistant seal (100).

3. The composite seal assembly of claim 2, wherein, The cross section of the corrosion-resistant seal (100) is provided with a reference line (120), and the included angle between the reference line (120) and the center line (130) of the corrosion-resistant seal (100) is 45°.

4. The composite seal assembly of claim 3, wherein, The opening (110) is symmetrically arranged about the reference line (120). The cross section of the inner layer seal (200) is circular.

5. The composite seal assembly of claim 4, wherein, The Shore hardness of the inner layer seal (200) is 50-60HA.

6. The composite seal assembly of any of claims 1-5, wherein, The composite sealing assembly is installed between the extractor (320) and the condenser (330).

7. A Soxhlet extractor characterized in that, The composite sealing assembly is installed between the extractor (320) and the condenser (330). The bottom outer wall of the extractor (320) and the condenser (330) is provided with a limiting assembly (340), and the top outer wall of the extractor (320) and the flask (310) is provided with a limiting protrusion (350), and the inner wall of the limiting protrusion (350) is provided with an inclined surface or an arc shape.

8. The Soxhlet extractor according to claim 7, characterized in that The composite sealing assembly is clamped between the inner walls of the limiting assembly (340) and the limiting protrusion (350). The limiting assembly (340) includes a first protrusion (341) and a second protrusion (342), and the first protrusion (341) and the second protrusion (342) are arranged in the axial direction of the extractor (320) and are spaced apart, and the composite sealing assembly is located between the first protrusion (341) and the second protrusion (342).

9. The Soxhlet extractor according to claim 8, characterized in that The second protrusion (342) is located below the first protrusion (341), and the surface of the second protrusion (342) away from the first protrusion (341) is provided with an inclined surface.

10. The Soxhlet extractor according to claim 9, characterized in that ​

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