Turbulent flow extraction device and extraction method thereof

Abstract

The present invention relates to a turbulent extraction device and an extraction method thereof. The extraction device includes a first extraction tube and a second extraction tube sealed with the first extraction tube, the second extraction tube having an opening that can be opened and closed; the first extraction tube includes, from top to bottom, an upper turbulent section, a sample section, and a lower turbulent section, wherein a sample is stored in the sample section, and a plurality of first sieve holes are provided at the sample section; the sample section is separated from the upper turbulent section and the lower turbulent section by an upper sieve plate and a lower sieve plate, respectively, and a plurality of second sieve holes are provided on the upper sieve plate and the lower sieve plate; the sample section is located in the second extraction tube, and the upper turbulent section and the lower turbulent section extend from the top and bottom of the second extraction tube, respectively; the extraction device also includes a solvent supply device, the top of the upper turbulent section and the bottom of the lower turbulent section are both connected to the solvent supply device. The present invention can make the sample and the solvent repeatedly contact with each other in turbulent flow, thereby enhancing the repeated extraction and dissolution of the solute.

Description

Technical Field

[0001] The present invention relates to the technical field of rapid sample extraction in the fields of food, environment, agriculture and the like, and in particular to a turbulent flow extraction device and an extraction method thereof. Background Art

[0002] In the sample detection of traditional Chinese medicine, food, environment, agriculture and other aspects, according to the needs of the research, the sample needs to be measured along with the effective ingredients, biological or chemical toxins, nutrients, etc., in order to analyze and study the sample efficacy, nutritional composition and the accumulation, migration and transformation of biological or chemical hazardous substances. In the usual sample inspection and detection, generally through the steps of homogenization, extraction, purification and detection, the commonly used extraction and purification methods include solvent extraction, Soxhlet extraction, solid phase extraction, liquid-liquid extraction, solid-liquid extraction, physical phase separation, etc. The detection of the sample requires the pretreatment of the sample so that the sample is a powder, a liquid crude extract, a semi-fluid state, etc., and the related substances therein need to be extracted or prepared in order to measure the solutes in the sample. In the above-mentioned extraction and preparation methods, there are often problems such as low extraction efficiency, poor accuracy of extraction target substances, more solvents used, long operation time, and subsequent complex purification. The test results are also often due to the differences in extraction and purification efficiency, resulting in inaccurate test values and large test errors.

[0003] To address these issues, sample extraction can be accelerated and promoted by adjusting parameters such as the contact and distribution of the sample and the extraction solvent, as well as the fluid viscosity and shear state. Currently, sample extraction is typically performed unidirectionally, with the solvent eluting the sample from a single direction. This shortens the contact time between the sample and the solvent, resulting in slower migration and release of sample solutes and lower extraction efficiency. Summary of the Invention

[0004] In response to the defects in the prior art, one of the technical problems to be solved by the present invention is to provide a turbulent extraction device, which can enable repeated turbulent contact between the sample and the solvent, thereby enhancing the repeated extraction and dissolution of the solute; the second technical problem to be solved by the present invention is to provide an extraction method for a turbulent extraction device to improve the extraction efficiency of the sample.

[0005] In order to solve one of the above technical problems, the present invention provides a turbulent extraction device, comprising a first extraction tube and a second extraction tube sealedly connected to the first extraction tube, the second extraction tube having an opening that can be opened and closed; the first extraction tube comprises an upper turbulent section, a sample section and a lower turbulent section from top to bottom, the sample section stores a sample, and a plurality of first sieve holes are provided at the sample section; the inner periphery of the sample section and the inner periphery of the upper turbulent section are separated by an upper sieve plate, the inner periphery of the sample section and the inner periphery of the lower turbulent section are separated by a lower sieve plate, and a plurality of second sieve holes are provided on both the upper sieve plate and the lower sieve plate, the apertures of the first sieve holes and the second sieve holes are smaller than the particle size of the sample; the sample section is located in the second extraction tube, the upper turbulent section and the lower turbulent section extend from the top and bottom of the second extraction tube respectively; and a solvent supply device is also included, the top of the upper turbulent section and the bottom of the lower turbulent section are both connected to the solvent supply device.

[0006] In the present invention, the sample is stored in a sample section located in the middle of the first extraction tube, and the solvent can enter the sample section from the upper turbulent section and the lower turbulent section respectively, and the flow directions of the solvents in the upper turbulent section and the lower turbulent section are opposite. When the two streams of solvent enter the sample section at the same time, the sample and the solvent can be repeatedly turbulently contacted, thereby enhancing the repeated extraction and dissolution of the solute; the extracted solution enters the second extraction tube through the first sieve hole, so that the extracted solution is collected through the opening for subsequent analysis.

[0007] Preferably, the top and bottom of the second extraction tube extend into the second extraction tube to form a first connecting channel and a second connecting channel, respectively. The upper turbulent section and the lower turbulent section are respectively disposed within the first connecting channel and the second connecting channel. Seals are provided between the upper turbulent section and the first connecting channel, and between the lower turbulent section and the second connecting channel. This design ensures a seal between the first and second extraction tubes and facilitates assembly and disassembly of the first extraction tube.

[0008] Preferably, the sealing member is in the shape of a T-shaped sleeve, which includes a first pipe segment and a second pipe segment in sequence along the direction away from the sample segment, the outer diameter of the first pipe segment is smaller than the outer diameter of the second pipe segment, and a step surface is formed at the end of the second pipe segment close to the first pipe segment; an annular protrusion is provided in the first connecting channel and the second connecting channel, and the protrusion forms an abutment surface at one end away from the sample segment, and the step surface abuts against the abutment surface.

[0009] Preferably, the upper turbulent section and the lower turbulent section are connected to the solvent supply device via a first pump body and a second pump body, respectively. The upper turbulent section and the lower turbulent section are controlled by the first pump body and the second pump body, respectively, so that the flow rates of the upper turbulent section and the lower turbulent section can be adjusted separately to achieve a better turbulent effect.

[0010] Preferably, the second extraction tube has openings at both the top and bottom, and diverter plates are disposed at the upper and lower portions of the inner circumference of the second extraction tube. The diverter plates are disposed around the first extraction tube and are provided with multiple through-holes. The sample section is located between the two diverter plates. The two openings are connected to the solvent supply device via the third and fourth pump bodies, respectively. With this structure, solvent can be injected into the second extraction tube before extraction, and during extraction, the first, second, third, and fourth pump bodies are simultaneously activated. At the beginning of extraction, the sample section experiences primary turbulence due to the countercurrent solvent flow from the upper and lower turbulent sections. At this point, the back pressure inside and outside the sample section is substantially consistent. Over time, as the extracted solution flows into the second extraction tube, increasing the flow rate of the pumps connected to the second extraction tube (i.e., the third and fourth pump bodies) creates a back pressure differential inside and outside the sample section, generating secondary turbulence inside and outside the sample section, further improving solute dissolution efficiency.

[0011] Preferably, the top and bottom of the sample section are detachably fixedly connected to the upper turbulent section and the lower turbulent section, respectively; the upper and lower sieve plates are both located within the sample section, and a receiving portion for mounting the lower sieve plate is provided at the bottom of the sample section. The upper and lower sieve plates prevent the sample within the sample section from scattering, facilitating a smooth extraction process; when loading the sample, the lower sieve plate is first placed on the receiving portion, and the sample is loaded onto the lower sieve plate. Once loading is complete, the upper sieve plate is placed on top of the sample.

[0012] Preferably, a first sealing cover is sealedly connected to the top of the upper turbulent section and the bottom of the lower turbulent section. The first sealing cover is provided with a first solvent channel connected to the first extraction tube, and the upper turbulent section and the lower turbulent section are connected to the solvent supply device through the corresponding first solvent channel. A second sealing cover is sealedly connected to each of the two openings. The second sealing cover is provided with a second solvent channel connected to the second extraction tube, and the two openings are connected to the solvent supply device through the corresponding second solvent channel. The design of the first and second sealing covers can improve the sealing performance of the entire extraction system.

[0013] To solve the second of the above technical problems, the present invention provides an extraction method for a turbulent extraction device, comprising the following steps: a preparation step: connecting the first sealing cover with the solvent supply device via a first connecting pipeline, and arranging the first pump body and the second pump body on the two first connecting pipelines, respectively, and opening the first pump body and the second pump body, and closing the first pump body and the second pump body after the solvent flowing out of the first sealing cover is a continuous fluid; a sampling step: loading the sample into the sample section of the first extraction tube, and installing the first extraction tube in the second extraction tube; an extraction step: sealingly connecting the two first sealing covers to the upper turbulent section and the lower turbulent section, respectively, and opening the first pump body and the second pump body; a collection step: after the extraction is completed, using a collection container connected to the opening to collect the extraction solution in the second extraction tube.

[0014] Preferably, in the loading step, the sample is solid, semi-homogeneous and liquid; when the sample is solid, the sample is powdered and then loaded into the sample segment; when the sample is liquid or semi-homogeneous, the sample is mixed with a 30-100 μm filler to form a dry or semi-dry sample, which is then loaded into the sample segment.

[0015] Preferably, in the preparation step, the second sealing cover is connected to the solvent supply device via a second connecting pipeline, and the third pump body and the fourth pump body are respectively provided on the two second connecting pipelines, and the third pump body and the fourth pump body are opened, and the third pump body and the fourth pump body are closed after the solvent flows out of the second sealing cover as a continuous fluid; a solvent injection step is also included between the loading step and the extraction step: the two second sealing covers are respectively sealed and connected to the two openings, and the third pump body and the fourth pump body are opened to inject the solvent into the second extraction tube; in the collection step, after the extraction is completed, the fourth pump body connected to the bottom opening of the second extraction tube is removed, and the collection container is connected to the opening at the bottom of the second extraction tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0017] Figure 1 Schematic diagram of the structure of a turbulent extraction device according to an embodiment of the present invention;

[0018] Figure 2Schematic diagram of the sealed connection structure between the upper turbulent section and the second extraction tube according to an embodiment of the present invention.

[0019] Reference numerals:

[0020] 1-first extraction tube; 11-upper turbulent section; 12-sample section; 13-lower turbulent section; 14-lower sieve plate; 15-upper sieve plate; 2-second extraction tube; 21-diverter plate; 22-cylindrical side plate; 221-raised portion; 3-sealing member; 4-container; 5-first sealing cover; 6-first pump body; 7-second pump body; 8-second sealing cover; 9-third pump body; 10-fourth pump body. DETAILED DESCRIPTION

[0021] The following embodiments of the technical solution of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0022] It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0023] like Figure 1 and Figure 2 As shown, this embodiment discloses a turbulent extraction device, comprising a first extraction tube 1 and a second extraction tube 2 sealedly connected to the first extraction tube 1 .

[0024] The second extraction tube 2 includes a central cylindrical section. The top and bottom of this cylindrical section taper into two conical sections, each with an openable and closable opening at one end away from the cylindrical section. Furthermore, diverter plates 21 are disposed at both the top and bottom of the cylindrical section. These diverter plates 21 are provided with multiple through-holes. An annular cylindrical side plate 22 connects the diverter plates 21 and the corresponding conical sections. The inner circumferences of the upper and lower annular cylindrical side plates 22 respectively form a first connecting channel and a second connecting channel, which extend through the corresponding conical sections and diverter plates. Furthermore, an annular protrusion 221 protrudes radially inward from the inner circumference of the annular cylindrical side plates, proximal to the cylindrical section. This protrusion 221 forms an abutment surface at the end away from the cylindrical section. In this embodiment, the protrusion 221, annular cylindrical side plates 22, diverter plates 21, conical sections, and cylindrical sections are integrally formed.

[0025] The first extraction tube 1 includes, from top to bottom, an upper turbulent section 11, a sample section 12, and a lower turbulent section 13, which are threadedly connected in sequence. The sample section 12 stores a sample, and a plurality of first sieve holes are provided on the side of the sample section 12. The inner bottom of the sample section 12 is tapered to form a receiving portion, on which a lower sieve plate 14 is placed. When loading the sample, the lower sieve plate 14 is first placed on the receiving portion, and the sample is loaded on the lower sieve plate 14. After the sample is loaded, the upper sieve plate 15 is placed on top of the sample, and then the sample section 12 is connected and fixed to the upper turbulent section 11 and the lower turbulent section 13. At this time, the upper sieve plate 15 and the lower sieve plate 14 can separate the sample from the upper turbulent section 11 and the lower turbulent section 13 to prevent the sample from scattering. In this embodiment, multiple second sieve holes are provided on the upper sieve plate 15 and the lower sieve plate 14. The aperture of the first sieve hole and the second sieve hole is smaller than the particle size of the sample, generally 5 μm, and the particle size of the sample is generally less than 100 μm, so as to generate back pressure.

[0026] After connecting the sample section 12 to the upper turbulent section 11 and the lower turbulent section 13, the first extraction tube 1 is placed into the second extraction tube 2, such that the sample section 12 is located between the two diverter plates 21, the upper turbulent section 11 is located within the first connecting channel, and the lower turbulent section 13 is located within the second connecting channel. In this embodiment, the upper turbulent section 11 and the lower turbulent section 13 are sealed and fixed within the first connecting channel and the second connecting channel, respectively, by seals 3. Specifically, the seals 3 are T-shaped sleeves and include, in sequence, a first tube section and a second tube section in a direction away from the sample section 12. The outer diameter of the first tube section is smaller than the outer diameter of the second tube section, and a stepped surface is formed at the end of the second tube section near the first tube section. This stepped surface abuts against the abutting surface of the corresponding raised portion 221. After the first extraction tube 1 is installed, the outer peripheries of the upper turbulent section 11 and the lower turbulent section 13 tightly abut against the inner peripheries of the corresponding seals 3, achieving a sealed fixation with the second extraction tube 2.

[0027] This embodiment further includes a solvent supply device for injecting an extraction solvent into the first extraction tube 1 and the second extraction tube 2. The solvent supply device includes four containers 4, each containing a solvent. The four containers 4 correspond one-to-one to the upper turbulent section 11, the lower turbulent section 13, and the two openings of the second extraction tube 2.

[0028] The upper turbulent section 11 and the lower turbulent section 13 extend from the top and bottom of the second extraction tube 2 respectively, and are sealed to the first sealing cover 5 at the top of the upper turbulent section 11 and the bottom of the lower turbulent section 13. The first sealing cover 5 is provided with a first solvent channel connected to the first extraction tube 1. The first solvent channels of the two first sealing covers 5 are connected to the corresponding containers 4 through two first connecting pipelines, and the first pump body 6 and the second pump body 7 are respectively provided on the two first connecting pipelines.

[0029] The two openings of the second extraction tube 2 are sealed with a second sealing cover 8, and the second sealing cover 8 is provided with a second solvent channel connected to the second extraction tube 2. The two second solvent channels are connected to the corresponding container 4 through two second connecting pipes, and a third pump body 9 and a fourth pump body 10 are respectively provided on the two second connecting pipes.

[0030] The inner circumferences of the first and second sealing caps 5, 8, are each provided with an O-ring. The first sealing caps 5 are threadedly connected to the upper turbulent section 11 and the lower turbulent section 13, respectively. The second sealing caps 8 are threadedly connected to the two openings of the second extraction tube 2. Furthermore, the ends of the first and second connecting pipes extending into the container 4 are connected to filter heads, commonly used in the art for large mobile phase suction filters used in liquid chromatographs, to filter impurities from the solvent.

[0031] In this embodiment, the sample is stored in the sample section 12 located in the middle of the first extraction tube 1, and the solvent can enter the sample section 12 from the upper turbulent section 11 and the lower turbulent section 13 respectively, and the flow directions of the solvents in the upper turbulent section 11 and the lower turbulent section 13 are opposite. When the two streams of solvent enter the sample section 12 at the same time, the sample and the solvent can be repeatedly in turbulent contact, thereby enhancing the repeated extraction and dissolution of the solute; the extracted solution enters the second extraction tube 2 through the first sieve hole, so that the extracted solution can be collected through the opening for subsequent analysis.

[0032] During the actual extraction process, the third pump body 9 and the fourth pump body 10 may not be opened. At this time, the second connecting pipeline is cut off. After the extraction is completed, the fourth pump body 10 is removed and the collection container is connected to the opening at the bottom of the second extraction tube 2 to collect the extraction solution.

[0033] Of course, in practice, the third pump body 9 and the fourth pump body 10 can also be turned on. At this time, a certain amount of solvent can be injected into the second extraction tube 2 in advance through the third pump body 9 and the fourth pump body 10. At the beginning of extraction, the back pressure inside and outside the sample segment 12 is consistent, and only one turbulence is formed in the sample segment 12. As the elution solution enters the second extraction tube 2, after a certain extraction time (approximately 1-2 minutes), by increasing the flow rate of the pump connected to the second extraction tube 2 (i.e., the third pump body 9 and the fourth pump body 10), the back pressure in the second extraction tube 2 is higher than the back pressure of the sample segment 12. At this time, there is a back pressure difference inside and outside the sample segment 12, and secondary turbulence will be formed inside and outside the sample segment 12, further improving the extraction effect and saving extraction time.

[0034] In addition, during the actual extraction process, the second extraction tube 2 can be heated as a whole to further improve the extraction effect. The heating method can be to place the second extraction tube 2 as a whole into a barrel-shaped temperature control jacket.

[0035] This embodiment also provides an extraction method using the turbulent flow extraction device, comprising the following steps:

[0036] Preparation steps: connect the first sealing cover 5 to the solvent supply device through the first connecting pipeline, and respectively install the first pump body 6 and the second pump body 7 on the two first connecting pipelines, and open the first pump body 6 and the second pump body 7. After the solvent flows out of the first sealing cover 5 as a continuous fluid, close the first pump body 6 and the second pump body 7;

[0037] Sampling step: loading the sample into the sample section 12 of the first extraction tube 1, and installing the first extraction tube 1 into the second extraction tube 2;

[0038] Extraction step: sealingly connecting the two first sealing covers 5 to the upper turbulent section 11 and the lower turbulent section 13 respectively, and opening the first pump body 6 and the second pump body 7;

[0039] Collection step: After the extraction is completed, a collection container is connected to the opening to collect the extraction solution in the second extraction tube 2.

[0040] Furthermore, in the loading step, the sample can be solid, semi-homogeneous and liquid; when the sample is solid, the sample is first powdered (the particle size of the sample after powdering is 10-100 μm) and then loaded into the sample segment 12; when the sample is liquid or semi-homogeneous, the sample is first mixed with a 30-100 μm filler to form a dry or semi-dry sample and then filled into the sample segment 12.

[0041] In practice, the extraction method of the turbulent flow extraction device can also be carried out according to the following steps:

[0042] Preparation steps: connect the first sealing cover 5 to the solvent supply device through the first connecting pipeline, and respectively set the first pump body 6 and the second pump body 7 on the two first connecting pipelines, and open the first pump body 6 and the second pump body 7. After the solvent flows out of the first sealing cover 5 as a continuous fluid, close the first pump body 6 and the second pump body 7; connect the second sealing cover 8 to the solvent supply device through the second connecting pipeline, and respectively set the third pump body 9 and the fourth pump body 10 on the two second connecting pipelines, open the third pump body 9 and the fourth pump body 10, and close the third pump body 9 and the fourth pump body 10 after the solvent flows out of the second sealing cover 8 as a continuous fluid;

[0043] Sampling step: loading the sample into the sample section 12 of the first extraction tube 1, and installing the first extraction tube 1 into the second extraction tube 2;

[0044] Solvent injection step: the two second sealing covers 8 are sealed and connected to the two openings respectively, and the third pump body 9 and the fourth pump body 10 are opened to inject the solvent into the second extraction tube 2;

[0045] Extraction step: sealingly connecting the two first sealing covers 5 to the upper turbulent section 11 and the lower turbulent section 13 respectively, and opening the first pump body 6 and the second pump body 7;

[0046] Collection step: After the extraction is completed, the fourth pump body 10 connected to the bottom opening of the second extraction tube 2 is removed, and a collection container is connected to the bottom opening of the second extraction tube 2.

[0047] In the description of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, systems, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0048] In the description of this specification, the reference terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, systems, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, systems, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A turbulent extraction device, characterized in that: include: a first extraction tube and a second extraction tube sealedly connected to the first extraction tube, wherein the second extraction tube has an opening that can be opened and closed; The first extraction tube includes, from top to bottom, an upper turbulent section, a sample section, and a lower turbulent section. The sample section stores a sample and is provided with a plurality of first sieve holes. The inner periphery of the sample section and the inner periphery of the upper turbulent section are separated by an upper sieve plate, and the inner periphery of the sample section and the inner periphery of the lower turbulent section are separated by a lower sieve plate. A plurality of second sieve holes are provided on both the upper sieve plate and the lower sieve plate. The apertures of the first sieve holes and the second sieve holes are smaller than the particle size of the sample. The sample section is located in the second extraction tube, and the upper turbulent section and the lower turbulent section extend from the top and bottom of the second extraction tube respectively; It also includes a solvent supply device, and the top of the upper turbulent section and the bottom of the lower turbulent section are both connected to the solvent supply device.

2. The turbulent flow extraction device according to claim 1, characterized in that: The top and bottom of the second extraction tube extend into the second extraction tube respectively to form a first connecting channel and a second connecting channel. The upper turbulent section and the lower turbulent section are respectively arranged in the first connecting channel and the second connecting channel, and sealing members are provided between the upper turbulent section and the first connecting channel and between the lower turbulent section and the second connecting channel.

3. The turbulent flow extraction device according to claim 2, characterized in that: The sealing member is in the shape of a T-shaped sleeve, and includes a first pipe section and a second pipe section in sequence in a direction away from the sample section, wherein the outer diameter of the first pipe section is smaller than the outer diameter of the second pipe section, and a step surface is formed at the end of the second pipe section close to the first pipe section; An annular raised portion is provided in each of the first connecting channel and the second connecting channel. An end of the raised portion away from the sample section forms an abutting surface, and the step surface abuts against the abutting surface.

4. The turbulent flow extraction device according to claim 1, characterized in that: The upper turbulent section and the lower turbulent section are communicated with the solvent supply device through a first pump body and a second pump body, respectively.

5. The turbulent flow extraction device according to claim 4, characterized in that: The second extraction tube has the opening at the top and bottom, and a diverter plate is provided at the upper and lower parts of the inner circumference of the second extraction tube. The diverter plate is arranged around the first extraction tube and has a plurality of through holes. The sample segment is located between the two diverter plates. The two openings are communicated with the solvent supply device through the third pump body and the fourth pump body respectively.

6. The turbulent flow extraction device according to claim 1, characterized in that: The top and bottom of the sample section are detachably fixedly connected to the upper turbulent section and the lower turbulent section respectively; The upper sieve plate and the lower sieve plate are both located in the sample section, and a receiving portion for mounting the lower sieve plate is provided at the bottom of the sample section.

7. The turbulent flow extraction device according to claim 5, characterized in that: The top of the upper turbulent section and the bottom of the lower turbulent section are both sealed with a first sealing cover, the first sealing cover is provided with a first solvent channel connected to the first extraction tube, and the upper turbulent section and the lower turbulent section are connected to the solvent supply device through the corresponding first solvent channels; The two openings are both sealed with a second sealing cover, and the second sealing cover is provided with a second solvent channel connected to the second extraction tube. The two openings are connected to the solvent supply device through the corresponding second solvent channels.

8. The extraction method of the turbulent flow extraction device according to claim 7, characterized in that: The steps include: Preparation step: connecting the first sealing cover to the solvent supply device via a first connecting pipeline, respectively providing the first pump body and the second pump body on the two first connecting pipelines, opening the first pump body and the second pump body, and closing the first pump body and the second pump body after the solvent flows out of the first sealing cover into a continuous fluid; Sampling step: loading the sample into the sample section of the first extraction tube, and installing the first extraction tube into the second extraction tube; Extraction step: sealingly connecting the two first sealing covers to the upper turbulent section and the lower turbulent section respectively, and opening the first pump body and the second pump body; Collection step: After the extraction is completed, a collection container is connected to the opening to collect the extraction solution in the second extraction tube.

9. The extraction method of the turbulent flow extraction device according to claim 8, characterized in that: In the loading step, the sample is solid, semi-homogeneous and liquid; When the sample is solid, the sample is powdered and then filled into the sample segment; When the sample is liquid or semi-homogeneous, the sample is mixed with a filler of 30-100 μm to form a dry or semi-dry sample, which is then filled into the sample segment.

10. The extraction method of the turbulent flow extraction device according to claim 8, characterized in that: In the preparation step, the second sealing cover is connected to the solvent supply device via a second connecting pipeline, and the third pump body and the fourth pump body are respectively provided on the two second connecting pipelines. The third pump body and the fourth pump body are opened, and the third pump body and the fourth pump body are closed after the solvent flows out of the second sealing cover into a continuous fluid. A solvent injection step is further included between the sample loading step and the extraction step: the two second sealing covers are sealedly connected to the two openings respectively, and the third pump body and the fourth pump body are opened to inject the solvent into the second extraction tube; In the collecting step, after the extraction is completed, the fourth pump body connected to the bottom opening of the second extraction tube is removed, and the collecting container is connected to the bottom opening of the second extraction tube.

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