Efficient and safe extraction tube and extractor

Abstract

The extraction pipe comprises an extraction pipe section part and a ventilation backflow part, the extraction pipe section part is a cylinder with one end open and the other end closed, the ventilation backflow part comprises a housing tightly attached to the outer wall of the extraction pipe section part, and a cavity is formed between the housing and the outer wall of the extraction pipe section part; an air inlet is formed in the outer wall of the extraction pipe section part, the extraction pipe section part is communicated with the cavity through the air inlet, a liquid outlet is formed in the bottom of the housing, a siphon is further arranged on the outer wall of the extraction pipe section part, one end of the siphon is communicated with the extraction pipe section part, and the other end of the siphon is communicated with the cavity; in the extractor provided with the extraction pipe, the bottle opening of the extraction bottle and the liquid outlet are in adaptive insertion communication, the gas inlet of the condenser and the opening end of the section part of the extraction pipe are in adaptive insertion communication, heat exchange between steam and the extraction pipe is achieved through the design of the deformed and attached extraction pipe, and the extraction pipe has the effects of temperature rise and heat preservation; the extraction efficiency can be improved while the energy consumption is reduced.

Description

Technical Field

[0001] This application relates to the technical field of Soxhlet extractors, and particularly to an efficient and safe extraction tube that can be used in a Soxhlet extractor. Background Art

[0002] The Soxhlet extractor is a commonly used chemical instrument in laboratories. It mainly utilizes the principles of solvent reflux and siphon to continuously extract solid substances with pure solvents, which not only saves solvents but also has high extraction efficiency.

[0003] The existing Soxhlet extractor consists of three parts: an extraction flask, an extraction tube, and a condenser. As shown in Figure 1 , on both sides of the extraction tube 02, there are a siphon tube 03 and a ventilation side tube 04 respectively. During extraction, the sample to be tested is wrapped in a filter paper packet and placed into the extraction tube 02. The round-bottom flask 01 (i.e., the extraction flask) is filled with the extraction pure solvent. The round-bottom flask 01 is heated, and the solvent vaporizes due to heat. The vapor rises through the ventilation side tube 04 on the outside of the extraction tube 02 and enters the condenser tube 05 at the upper end of the extractor. It condenses into a liquid and drips into the extraction tube 02. When the solvent liquid level in the extraction tube 02 reaches a certain height and exceeds the top of the side siphon tube 03, the solvent flows back into the round-bottom flask 01 through the siphon tube 03. The solvent flowing into the round-bottom flask 01 continues to be heated, vaporized, rise, condense, and drip into the extraction tube 02. This process is repeated until the extraction of the experimental active ingredient is complete.

[0004] The existing Soxhlet extractor has defects such as fast heat dissipation, long solvent cooling and reflux cycle, and fragile structure in practice, which are mainly reflected in the following aspects:

[0005] 1. By heating the round-bottom flask 01, the pure solvent vapor volatilized from it passes through the ventilation side tube 04 on the outside of the extraction tube 02 to reach the condenser tube 05 at the upper end of the extractor, and then after condensation, it drips into the extraction tube 02 for immersion extraction. During this process, the rising vapor is easily affected by the surrounding environmental temperature and it is difficult to form a stable hot vapor in the ventilation side tube 04 with a smaller inner diameter.

[0006] 2. The pure solvent droplets dripping back into the extraction tube 02 in the condenser tube 05 have a lower temperature when soaking the solid material with the coolant, resulting in low extraction efficiency. And when reaching the siphon height, the coolant in the extraction tube 02 flows back into the round-bottom flask 01 in a large amount at one time, causing the hot boiling solvent in the flask to be cooled and undergo intermittent boiling, resulting in a long solvent reflux cycle and a long extraction time.

[0007] 3. The inner diameter of the siphon tube 03 is small and it is exposed outside the extraction cylinder. It is easily damaged during use, resulting in the scrapping of the instrument. Especially once it is damaged, it may also cause injury to the experimental personnel. The structure of the siphon tube 03 is fixed and the siphon reflux effect can only occur when reaching the siphon height, with poor controllability. The small diameter not only affects the siphon rate but also is prone to blockage problems.

[0008] Therefore, there are still many defects in the existing Soxhlet extractor, and it is urgent to propose a new technical solution to solve the problems existing in the prior art. Utility Model Content

[0009] This application provides an extraction tube and an extractor that are efficient and safe to solve the problem of relatively low extraction efficiency of the existing Soxhlet extractor.

[0010] In order to achieve the above object, this application provides the following technical solutions:

[0011] On the one hand, this application provides an extraction tube that is efficient and safe, including a tube body. The tube body includes an extraction tube section and a ventilation and reflux section; the extraction tube section is a cylinder with one end open and the other end closed. A connection port for connecting to a condenser is formed at the open end of the extraction tube section; the ventilation and reflux section includes a housing closely attached to the outer wall of the extraction tube section. A cavity is formed between the housing and the outer wall of the extraction tube section. An air inlet is provided on the outer wall of the extraction tube section, and the extraction tube section is communicated with the cavity through the air inlet. A liquid discharge port is formed at the bottom of the housing, and a connection port for connecting to an extraction bottle is formed at the liquid discharge port; a siphon tube is also provided on the outer wall of the extraction tube section. One end of the siphon tube is communicated with the extraction tube section, and the other end of the siphon tube is communicated with the cavity.

[0012] In the above technical solution, further, the extraction tube section is a cylindrical structure, and an inclined plane is formed on the side wall of the extraction tube section near its closed end, and the inclined plane intersects with the closed bottom surface of the extraction tube section.

[0013] Furthermore, the housing of the ventilation and reflux section includes a first outer shell portion correspondingly covering the inclined plane, a second outer shell portion correspondingly covering the closed bottom surface of the extraction tube section, and a third outer shell portion connected below the second outer shell portion. Among them, the first outer shell portion, the second outer shell portion, and the third outer shell portion are integrally formed and connected; the air inlet is provided on the inclined plane.

[0014] Furthermore, the closed bottom surface of the extraction tube section is an arc surface, and the arc surface bends towards the second outer shell portion.

[0015] Furthermore, the connection port provided at the open end of the extraction tube section includes a connection tube section that is adaptively plugged and connected to the gas inlet of the condenser.

[0016] Furthermore, the first outer shell portion, the second outer shell portion, and the extraction tube section enclose a frustum-shaped structure.

[0017] Furthermore, the third outer shell portion includes a conical cylinder connected below the second outer shell portion and a liquid discharge tube provided at the top of the conical cylinder. The end of the liquid discharge tube forms a liquid discharge port, and the liquid discharge tube is adaptively plugged and connected to the bottle mouth of the extraction bottle.

[0018] Further, a first connecting pipe for installing a siphon tube is provided on the housing of the ventilation and reflux part, and the siphon tube is communicated with the cavity through the first connecting pipe; a second connecting pipe is provided on the outer wall of the extraction pipe section part, and the siphon tube is communicated with the inner cavity of the extraction pipe section part through the second connecting pipe.

[0019] Furthermore, the siphon tube comprises two hoses with different lengths and a glass elbow pipe. The two hoses are connected by the glass elbow pipe to jointly form a U-shaped siphon tube.

[0020] Furthermore, a fixing member is provided on the siphon tube, a fixing seat is installed on the outer wall of the extraction pipe section part, a plurality of fixing grooves are provided on the fixing seat, the plurality of fixing grooves are arranged in a row along the length direction of the extraction pipe section part, and the fixing member is adaptively inserted and connected with each fixing groove.

[0021] On the other hand, the present application provides an extractor, which comprises an extraction bottle, a condenser and the above-mentioned highly efficient and safe extraction pipe. The extraction pipe is adaptively plugged with the gas inlet of the condenser through a connection port arranged at the opening of the extraction pipe section part, and the extraction pipe is adaptively plugged with the extraction bottle through a connection port arranged at the liquid discharge port of the ventilation and reflux part. The extraction bottle, the ventilation and reflux part and the condenser's condensing pipe are sequentially gas-connected, the condensing pipe is communicated with the inner cavity of the extraction pipe section part, and the inner cavity of the extraction pipe section part and the extraction bottle are liquid-conducted through the siphon tube and the ventilation and reflux part.

[0022] Compared with the prior art, the present application has at least the following beneficial effects:

[0023] 1. The present application provides a highly efficient and safe extraction pipe, which comprises two parts that are attached to each other, namely an extraction pipe section part and a ventilation and reflux part. The extraction pipe section part is a cylinder with one end open and the other end closed, and the open end is used to be connected with the condensing pipe. The ventilation and reflux part comprises a housing attached to the outer wall of the extraction pipe section part, and a cavity is formed between the housing and the outer wall of the extraction pipe section part. The cavity is communicated with the inner cavity of the extraction pipe section part through an air inlet arranged on the outer wall of the extraction pipe section part. During extraction, the steam in the extraction bottle sequentially enters the cavity in the housing and the inner cavity of the extraction pipe section part and then reaches the condenser. This deformed and fitted design of the extraction pipe combines the ventilation and reflux part and the extraction pipe section part to realize the heat exchange between the steam and the extraction pipe, and can form stable hot steam. Moreover, the extraction pipe provided by the present application is of an integrated design, and the two parts are closely attached to be able to stably maintain heat, improving the heat transfer efficiency, and to a certain extent playing a role in keeping the temperature of the material soaking extract, increasing the temperature of the extraction solvent, shortening the time required for the extraction bottle to boil intermittently, and enhancing the extraction efficiency.

[0024] 2. In the extraction tube provided by the present application, the ventilation reflux part covers the side wall and the bottom wall of the extraction tube section. The part of the housing corresponding to the extraction tube section is a conical arc surface. Compared with the traditional Soxhlet extraction tube, the conduction area between the ventilation reflux part and the extraction bottle is increased, the steam conduction efficiency is improved, and the ventilation reflux part is attached to the extraction tube section to achieve heat exchange. While reducing energy consumption, the extraction efficiency is improved, the purity of the extraction liquid is ensured, and the product yield is increased.

[0025] 3. Traditional siphon tubes are easy to break and clog. Therefore, in this application, a flexible tube is used instead of the traditional glass tube. The siphon tube is formed by connecting two flexible tubes with different lengths and a bent glass tube into an inverted U shape through flexible tubes, and the height of the siphon tube can be adjusted to control the siphon volume. The detachable flexible siphon tube effectively solves the problems of easy clogging and difficult cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. It should be understood that the specific shapes and structures shown in the drawings generally should not be regarded as limiting conditions when implementing the present application; for example, those skilled in the art are capable of making routine adjustments or further optimizations to the addition / deletion / attribution division of certain units (components), specific shapes, positional relationships, connection methods, dimensional proportional relationships, etc. based on the technical concepts disclosed in the present application and the exemplary drawings.

[0027] Figure 1 is a schematic structural diagram of the existing Soxhlet extractor in the background art;

[0028] Figure 2 is a schematic main structure diagram of the extraction tube provided by the present application in an embodiment, and the siphon tube is not shown in this figure;

[0029] Figure 3 is a schematic exploded structure diagram of the extraction tube section and the ventilation reflux part of the extraction tube provided by the present application in an embodiment;

[0030] Figure 4 is a schematic perspective structure diagram of the main part of the extraction tube provided by the present application in an embodiment, and the extraction tube section and the ventilation reflux part are in a split state in this figure;

[0031] Figure 5 is a schematic perspective structure diagram of the ventilation reflux part of the extraction tube provided by the present application in an embodiment;

[0032] Figure 6Schematic perspective view of the extraction tube section of the extraction tube provided in the present application in an embodiment;

[0033] Figure 7 Schematic plan view of the siphon tube of the extraction tube provided in the present application in an embodiment. This figure only shows the inverted U-shaped structure of the siphon tube and does not show the specific connection state between the individual pipe sections that make up the siphon tube.

[0034] Explanation of reference numerals:

[0035] 01, round-bottom flask; 02, extraction tube; 03, siphon tube; 04, ventilation side tube; 05, condenser tube;

[0036] 1, extraction tube section; 11, inclined cut surface; 12, closed bottom surface;

[0037] 2, ventilation and reflux section; 21, cavity; 22, liquid discharge port;

[0038] 3, siphon tube. Detailed implementation manners

[0039] The following further details the present application through specific embodiments in conjunction with the accompanying drawings.

[0040] In the description of the present application: Unless otherwise specified, "a plurality" means two or more. Terms such as "first", "second", "third", etc. in the present application are intended to distinguish the objects being referred to and do not have a special meaning in terms of technical connotation (for example, it should not be understood as emphasizing the importance level or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0041] Terms such as "upper", "lower", "left", "right", "middle", etc. cited in the present application are usually for the convenience of intuitively understanding with reference to the accompanying drawings and are not an absolute limitation on the positional relationship in the actual product. Without departing from the technical concept disclosed in the present application, changes in these relative positional relationships should also be regarded as within the scope of the expression of the present application.

[0042] Embodiment 1

[0043] In the process of practice, the inventor found that there are some drawbacks in using a traditional-structured Soxhlet extractor, such as fast heat dissipation of the extraction cylinder, low extraction temperature, fragile siphon tube, easy contamination or blockage of the siphon tube, etc. Therefore, based on further analysis and research of the above technical problems, the inventor proposed an innovative technical solution. By improving the structure of the traditional Soxhlet extractor, it is possible to further quickly extract in the experiment, improve the extraction efficiency, shorten the extraction time, and reduce energy consumption. The structure of an efficient and safe extraction tube provided in this embodiment is described in detail below.

[0044] In this embodiment, referring to Figure 2 and 3 , the extraction tube includes an extraction tube section 1 and a ventilation and reflux section 2. The extraction tube section 1 is a cylinder with one end open and the other end closed, and the open end is used to connect to the condenser; the ventilation and reflux section 2 includes a housing closely attached to the outer wall of the extraction tube section 1. A cavity 21 is formed between the housing and the outer wall of the extraction tube section 1. An air inlet is provided on the outer wall of the extraction tube section 1, and the extraction tube section 1 communicates with the cavity 21 through the air inlet. A liquid discharge port 22 is formed at the bottom of the housing, and the liquid discharge port 22 is used to connect to an extraction bottle; a siphon tube 3 is also provided on the outer wall of the extraction tube section 1. One end of the siphon tube 3 communicates with the extraction tube section 1, and the other end of the siphon tube 3 communicates with the cavity 21.

[0045] In order to improve the simplicity of operation of the Soxhlet extractor, enhance the extraction efficiency, reduce energy consumption, ensure the purity of the extraction liquid, and increase the product yield, this application uses a new structure of a deformable and conforming extraction cylinder to replace the traditional outer ventilation duct. The lower end of the ventilation and reflux section 2 is enlarged into a quasi-ellipse to connect with the extraction bottle (round-bottom flask), increasing the steam conduction efficiency. An air inlet is provided on the outer wall of the extraction tube section 1 to keep it in gas communication with the ventilation and reflux section 2. The structure of the ventilation and reflux section 2 corresponding to the extraction tube section 1 is in the shape of a quasi-conical arc surface. In this application, the ventilation and reflux section 2 conforms to the outer wall of the extraction tube section 1 to enable heat exchange between the steam and the extraction tube. Moreover, an integrated design is adopted, enabling the wall of the extraction tube section 1 to maintain heat more stably, improving the heat transfer efficiency, having a heat preservation effect on the material soaking extraction liquid, raising the temperature of the extraction solvent, shortening the time required for intermittent boiling of the round-bottom flask, and enhancing the extraction efficiency.

[0046] In this embodiment, referring to Figure 3 , the extraction tube section 1 is in a cylindrical structure. An inclined plane 11 is formed on the side wall of the extraction tube section 1 near its closed end. The inclined plane 11 intersects with the closed bottom surface 12 of the extraction tube section 1. The housing of the ventilation and reflux section 2 covers the inclined plane 11 and the bottom wall of the extraction tube section 1, and the air inlet on the outer wall of the extraction tube section 1 is provided on the inclined plane 11.

[0047] In this embodiment, the closed bottom surface 12 of the extraction tube section 1 is an arc surface that curves towards the second housing part. Of course, in other embodiments, the closed bottom surface 12 of the extraction tube section 1 can also be an inclined plane or a horizontal plane. Relatively speaking, the surface area of the arc surface is relatively large, which can increase the heat exchange area between the extraction tube section 1 and the ventilation and reflux section 2.

[0048] In this embodiment, the housing of the ventilation and reflux part 2 can be divided into three parts. Of course, during manufacturing, it is preferably integrally formed. These three parts are: the first outer shell part, the second outer shell part, and the third outer shell part. Among them: the first outer shell part covers the inclined plane 11, the second outer shell part covers the closed bottom surface 12 of the extraction pipe section 1, and the third outer shell part is connected below the second outer shell part; the first outer shell part, the second outer shell part, and the extraction pipe section 1 enclose a frustum-shaped structure; the third outer shell part includes a conical cylinder connected to the lower part of the second outer shell part and a liquid discharge pipe provided at the top of the conical cylinder. The end of the liquid discharge pipe forms a liquid discharge port 22, and the liquid discharge pipe is adaptively inserted into the bottle mouth of the extraction bottle. The structure provided by this application can be summarized as a semi-enclosed integrated extraction pipe for the air duct. In a specific processing example, the cylinder of the extraction pipe section 1 and the arc-shaped housing of the ventilation and reflux part 2 are welded together. The steam in the extraction bottle climbs in the conical space formed by the arc-shaped housing and the outer wall of the extraction pipe section 1 wrapped therewith. A number of small holes can be opened on the side wall of the extraction pipe section 1 to enable the steam to fully enter the condenser tube, and heat exchange occurs on the outer wall of the extraction pipe section 1 to achieve a certain degree of temperature increase or heat preservation effect on the solvent inside the pipe wall.

[0049] In this embodiment, the siphon 3 includes two hoses with different lengths and a glass elbow. The two hoses are connected by the glass elbow to jointly form a U-shaped siphon 3, as Figure 7 . When in use, the siphon 3 is installed in an inverted U shape. This detachable hose structure design effectively solves the problems of easy blockage and difficult cleaning.

[0050] In this embodiment, the hoses constituting the siphon 3 can be made of PTFE material, rubber material, etc.

[0051] In this embodiment, a first connecting pipe for installing the siphon 3 is provided on the housing of the ventilation and reflux part 2. The siphon 3 is connected to the cavity 21 through the first connecting pipe; a second connecting pipe is provided on the outer wall of the extraction pipe section 1. The siphon 3 is connected to the inner cavity of the extraction pipe section 1 through the second connecting pipe; a fixing member is provided on the siphon 3, and a fixing seat is installed on the outer wall of the extraction pipe section 1. A number of fixing grooves are provided on the fixing seat, and the number of fixing grooves is arranged in a row along the length direction of the extraction pipe section 1. The fixing member is adaptively inserted and connected with each fixing groove. Therefore, when in use, the installation height of the siphon 3 can be adjusted by adjusting the installation position of the fixing member, thereby controlling the siphon volume and adjusting the siphon rate.

[0052] In this embodiment, the siphon hoses have different lengths and diameters to adjust and control the siphon rate and siphon volume. At the same time, a hose adapter can be installed and an additional switch valve can be connected to enable sampling and detection of the extraction degree without shutting down the experiment. The siphon rate can also be increased by adding a structural device, such as adding a diamond-shaped pipe to the hose to further increase the siphon rate.

[0053] The efficient and safe extraction tube provided in the present application has a stable structure and is not prone to the phenomenon of ventilation tube breakage. It can speed up the siphon rate, reduce the risk of siphon tube breakage, improve the insulation effect of the extraction liquid, shorten the experiment time, and better maintain the normal progress of the experiment.

[0054] Embodiment 2

[0055] This embodiment provides another extraction tube, which has a structure substantially the same as that of the extraction tube provided in the first embodiment, with the main difference being:

[0056] In this embodiment, the extraction pipe section is a column with one end open and the other end closed, and the ventilation reflux section is another column covered on the periphery of the side wall and bottom wall of the extraction pipe section. Of course, the top of the column constituting the ventilation reflux section is sealed with the side wall of the extraction pipe section, and an air inlet is provided on the outer wall of the extraction pipe section, and the gas is conducted through the air inlet and the ventilation reflux section; the bottom of the column constituting the ventilation reflux section is connected and conducted with the extraction bottle accordingly. This double-layer nested structural design can also realize heat exchange and heat preservation between the extraction pipe section and the ventilation reflux section, improve extraction efficiency, shorten extraction time, and reduce energy consumption.

[0057] Embodiment 3

[0058] This embodiment provides an efficient and safe extractor, which includes an extraction bottle, a condenser, and the extraction tube described in the above-mentioned embodiment 1 or embodiment 2. The extraction tube is adapted and plugged with the gas inlet of the condenser through a connection port provided at the opening of the extraction tube section, and the extraction tube is adapted and plugged with the extraction bottle through a connection port provided at the liquid discharge port of the ventilation reflux section. The extraction bottle, the ventilation reflux section, and the condenser tube of the condenser are gas-connected in sequence, and the condenser tube is connected with the inner cavity of the extraction tube section. The inner cavity of the extraction tube section and the extraction bottle are liquid-conducted through the siphon tube and the ventilation reflux section.

[0059] Since the extractor adopts the extraction tube provided in the present application, its structure is stable and the ventilation tube is not prone to breakage due to the function of the extraction tube. It can speed up the siphon rate, reduce the risk of siphon tube breakage, improve the insulation effect of the extraction liquid, shorten the experiment time, and better maintain the normal progress of the experiment.

[0060] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

[0061] In the foregoing, the present application has been described in a relatively specific and detailed manner through general descriptions and specific embodiments. It should be understood that based on the technical concept of the present application, several conventional adjustments or further innovations can also be made to these specific embodiments; however, as long as they do not depart from the technical concept of the present application, the technical solutions obtained through these conventional adjustments or further innovations also fall within the scope of protection of the claims of the present application.

Claims

1. An efficient and safe extraction tube, characterized in that, It includes a pipe body, and the pipe body includes an extraction pipe section and a ventilation and reflux section; the extraction pipe section is a cylindrical body with one end open and the other end closed, and a connection port for connecting to a condenser is formed at the open end of the extraction pipe section; the ventilation and reflux section includes a housing closely attached to the outer wall of the extraction pipe section, a cavity is formed between the housing and the outer wall of the extraction pipe section, an air inlet is opened on the outer wall of the extraction pipe section, and the extraction pipe section is communicated with the cavity through the air inlet, a liquid discharge port is formed at the bottom of the housing, and a connection port for connecting to an extraction bottle is formed at the liquid discharge port; a siphon is further arranged on the outer wall of the extraction pipe section, one end of the siphon is communicated with the extraction pipe section, and the other end of the siphon is communicated with the cavity; The extraction pipe section is of a cylindrical structure, and an inclined plane is formed on the side wall of the extraction pipe section near its closed end, and the inclined plane intersects with the closed bottom surface of the extraction pipe section; The housing of the ventilation and reflux section includes a first outer shell portion correspondingly covering the inclined plane, a second outer shell portion correspondingly covering the closed bottom surface of the extraction pipe section, and a third outer shell portion connected below the second outer shell portion, wherein the first outer shell portion, the second outer shell portion and the third outer shell portion are integrally formed and connected; the air inlet is arranged on the inclined plane; The closed bottom surface of the extraction pipe section is an arc surface, and the arc surface bends towards the second outer shell portion.

2. The efficient and safe extraction tube according to claim 1, wherein The connection port arranged at the open end of the extraction pipe section includes a connection pipe section adaptively inserted and connected with the gas inlet of the condenser.

3. The efficient and safe extraction tube according to claim 1, characterized in that, The first outer shell portion, the second outer shell portion and the extraction pipe section enclose a frustum-shaped structure; The third outer shell portion includes a conical cylinder connected below the second outer shell portion and a liquid discharge pipe arranged at the top of the conical cylinder, the end of the liquid discharge pipe forms the liquid discharge port, and the liquid discharge pipe is adaptively inserted and connected with the bottle mouth of the extraction bottle.

4. The efficient and safe extraction tube according to claim 1, characterized in that, A first connection pipe for installing the siphon is arranged on the housing of the ventilation and reflux section, and the siphon is communicated with the cavity through the first connection pipe; a second connection pipe is arranged on the outer wall of the extraction pipe section, and the siphon is communicated with the inner cavity of the extraction pipe section through the second connection pipe.

5. The efficient and safe extraction tube according to claim 4, wherein The siphon includes two hoses with different lengths and a glass elbow pipe, and the two hoses are connected through the glass elbow pipe to jointly form a U-shaped siphon.

6. The efficient and safe extraction tube according to claim 5, characterized in that, A fixing piece is arranged on the siphon, a fixing seat is installed on the outer wall of the extraction pipe section, a plurality of fixing grooves are arranged on the fixing seat, and the plurality of fixing grooves are arranged in a row along the length direction of the extraction pipe section, and the fixing piece is adaptively inserted and connected with each fixing groove.

7. An extractor, characterized in that, It includes an extraction bottle, a condenser, and the highly efficient and safe extraction tube described in any one of claims 1 to 6. The extraction tube is adaptively plugged into the gas inlet of the condenser through a connection port provided at the opening of the extraction tube section. The extraction tube is adaptively plugged into the extraction bottle through a connection port provided at the liquid discharge port of the ventilation and reflux section. The extraction bottle, the ventilation and reflux section, and the condenser's condensation tube are sequentially in gas communication. The condensation tube is in communication with the inner cavity of the extraction tube section. The inner cavity of the extraction tube section and the extraction bottle are in liquid conduction through the siphon tube and the ventilation and reflux section.

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