Herbal volatile oil extraction device

Abstract

The utility model provides a herbal volatile oil extraction device. The herbal volatile oil extraction device comprises a distillation extraction tank, a condenser, an oil-water separation tank communicated with the lower part of the condenser, a valve body, a distilled water collection tank and a volatile oil collection tank, the first channel, the second channel and the third channel lead to the bottoms of the distilled water collecting tank, the volatile oil collecting tank and the oil-water separating tank from the shunting channel. The valve body is further provided with a pressing rod part and a fourth channel communicated with the distillation extraction tank, and the fourth channel is provided with a first valve used for connection and disconnection. When the pressing rod part slides in the flow dividing channel, the third channel communicates with the first channel, the second channel and the fourth channel, and when the third channel communicates with the second channel, the first valve is in a cut-off state. According to the utility model, the fourth channel is communicated with the third channel and the distillation extraction tank, so that an oil-water mixed solution containing trace volatile oil flows back into the distillation extraction tank to be extracted again, and the extraction efficiency of the volatile oil is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of organic matter extraction, in particular to a herbal volatile oil extraction device. Background Art

[0002] Many plants contain volatile oils, which are a general term for low-boiling-point substances with special aromas. At present, the extraction of volatile oils in traditional Chinese medicine production generally adopts steam distillation, which takes out the volatile components in the plant raw materials through the action of water vapor, forms liquid under the action of condenser, and falls to stand and separate.

[0003] When extracting volatile oil, the existing laboratory volatile oil extractor often keeps the volatile oil in the collecting tube for a long time after being condensed by water vapor. Since the collecting tube keeps receiving the mixed liquid that continues to condense from above, the temperature of the oil-water layer in the collecting tube is relatively high, and the liquid remaining from above continuously impacts the oil layer, which easily breaks the oil layer into oil droplets and adsorbs on the inner wall of the collecting tube. The oil droplets may gradually move downward on the inner wall due to the action of water pressure, and re-enter the distillation flask through the reflux pipe for high-temperature cooking, thereby reducing the yield of volatile oil.

[0004] Moreover, in the process of extracting volatile oil, due to the low yield of volatile oil, a large amount of solvent is often required to be injected to allow the volatile oil to obtain a larger heating area and heat transfer rate, resulting in an increase in the cost of the steam distillation method for extracting herbal volatile oil. Utility Model Content

[0005] In view of this, the utility model aims to provide a herbal volatile oil extraction device, so as to improve the extraction rate of herbal oil and reduce the extraction cost.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A herbal volatile oil extraction device, comprising a distillation extraction tank, a condenser, an oil-water separation tank connected to the lower part of the condenser, a valve body for diverting the oil-water separation tank, and a distillate collection tank and a volatile oil collection tank respectively connected to the valve body;

[0008] The valve body is provided with a shunt channel, and a first channel, a second channel and a third channel leading from the shunt channel to the distillate collecting tank, the volatile oil collecting tank and the bottom of the oil-water separation tank;

[0009] The valve body is also provided with a pressure rod portion sliding along the diversion channel, and a fourth channel communicating with the distillation extraction tank, and the fourth channel is provided with a first valve for opening and closing;

[0010] When the pressure rod slides in the diversion channel, the third channel is communicated with the first channel, the second channel and the fourth channel respectively. When the third channel is communicated with the second channel, the first valve is in a cut-off state.

[0011] Furthermore, the pressure rod portion is also connected to a driving member, and the driving member is connected to the oil-water separation tank via a mounting plate.

[0012] Furthermore, the pressure rod portion includes a connecting portion connected to the power output end of the driving member, and a flow guide portion connected to the connecting portion;

[0013] The connecting portion is adapted to the diverting channel, the cross section of the diverting portion is smaller than the cross section of the connecting portion, and a flow gap is formed between the diverting portion and the inner wall of the diverting channel;

[0014] A blocking portion is also provided at the lower part of the guide portion, and the blocking portion is adapted to be arranged with the diversion channel. The blocking portion and the connecting portion are driven to slide to block the first channel and the second channel respectively.

[0015] Furthermore, along the height direction of the diverter channel, the first channel, the third channel, the fourth channel and the second channel are arranged in sequence from bottom to top; the first channel is arranged along the extension direction of the diverter channel and is connected to the diverter channel;

[0016] The second channel, the third channel and the fourth channel are respectively intersected and communicated with the diversion channel.

[0017] Furthermore, the third channel and the second channel are respectively arranged on opposite sides of the valve body.

[0018] Furthermore, a second valve for opening and closing is provided on the second channel.

[0019] Furthermore, a baffle is connected to the inner wall of the oil-water separation tank, and the baffle divides the inner cavity of the oil-water separation tank into an upper cavity and a lower cavity;

[0020] A connecting hole for connecting the upper cavity and the lower cavity is provided along the edge of the baffle.

[0021] Furthermore, the baffle includes a protruding portion bent upward, and a flange portion connected to the edge of the protruding portion and arranged horizontally;

[0022] The side of the flange portion abuts against the inner wall of the oil-water separation tank, and at least one of the communication holes is arranged at the edge of the flange portion.

[0023] Further, the protruding portion includes a horizontal portion disposed in the middle, and an inclined portion connected to an edge of the horizontal portion;

[0024] The cross section of the inclined portion is gradually increased from the horizontal portion downward.

[0025] Compared with the prior art, the utility model has the following advantages:

[0026] The herbal volatile oil extraction device described in the utility model is provided with a shunt channel and a pressure rod part in the valve body, so that the pressure rod part can divert the distillate located at the lower part of the oil-water separation tank to the distillate collection tank and the volatile oil collection tank respectively during the sliding process in the shunt channel, and can also connect the third channel and the distillation extraction tank by providing a fourth channel, so that the oil-water mixed liquid containing trace volatile oil in the oil-water separation tank can flow back to the distillation extraction tank for re-extraction, thereby improving the extraction efficiency of the volatile oil. In addition, by arranging multiple channels on the valve body, the position of the pressure rod part is changed to realize the layer-by-layer suction of the distillate layer, the oil-water mixed liquid layer and the volatile oil layer, which can further ensure the separation effect.

[0027] In addition, by arranging a driving member on the pressure rod part, the sliding of the pressure rod part is facilitated, the structure is simple, and it is easy to implement. The pressure rod part is also arranged as a connecting part, a flow guiding part, and a blocking part, so that the liquid flows in the flow gap of the shunt channel, reducing the flow cross section, and can effectively avoid the disadvantage of agitation when the oil-water mixed liquid layer and the other two layers are alternately switched, causing the shunt liquid to be impure, and further improving the extraction effect of volatile oil.

[0028] In addition, by arranging a baffle in the oil-water separation tank and providing a connecting hole on the edge of the baffle, the oil-water mixture falling from the condenser is prevented from impacting the liquid that has been stationary at the bottom. This not only enables the collection of distillate during the distillation process, but also prevents the separated upper volatile oil from splashing due to the impact and causing the volatile oil to adhere to the inner wall of the oil-water separation tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0030] Figure 1 This is a connection structure diagram of the herbal volatile oil extraction device described in an embodiment of the utility model;

[0031] Figure 2 This is a connection structure diagram of the herbal volatile oil extraction device with the valve body and baffle in cross section according to the embodiment of the utility model;

[0032] Figure 3This is a schematic diagram of the three-dimensional structure of the valve body according to an embodiment of the utility model;

[0033] Figure 4 It is a schematic diagram of a three-dimensional structure with internal lines of the valve body according to an embodiment of the utility model;

[0034] Figure 5 This is a schematic diagram of the top view of the valve body according to an embodiment of the utility model;

[0035] Figure 6 for Figure 5 Schematic cross-sectional view at AA in FIG.

[0036] Figure 7 for Figure 5 A cross-sectional schematic diagram at BB in FIG.

[0037] Figure 8 It is a top view schematic diagram of the baffle described in the embodiment of the utility model.

[0038] Description of reference numerals:

[0039] 1. Distillation extraction tank; 2. Condenser; 3. Oil-water separation tank; 4. Valve body; 5. Distillate collection tank; 6. Volatile oil collection tank; 7. Driving parts; 8. Baffle;

[0040] 401, diversion channel; 402, first channel; 403, second channel; 404, third channel; 405, pressure rod; 406, fourth channel; 407, first valve; 408, second valve;

[0041] 801, connecting hole; 802, flange portion; 803, inclined portion; 804, horizontal portion;

[0042] 4051. Connecting part; 4052. Diversion part; 4053. Sealing part. DETAILED DESCRIPTION

[0043] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0044] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "back" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0045] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0046] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0047] The present embodiment relates to a herbal volatile oil extraction device, comprising a distillation extraction tank 1 and a condenser 2. The herbal volatile oil extraction device further comprises an oil-water separation tank 3 connected to the lower part of the condenser 2, a valve body 4 for diverting the oil-water separation tank 3, and a distilled water collection tank and a volatile oil collection tank 6 respectively connected to the valve body 4. A diverting channel 401 is provided in the valve body 4, as well as a first channel 402, a second channel 403 and a third channel 404 leading from the diverting channel 401 to the distilled water collection tank, the volatile oil collection tank 6 and the bottom of the oil-water separation tank 3.

[0048] In addition, the valve body 4 is also provided with a pressure rod 405 sliding along the flow-dividing channel 401, and a fourth channel 406 communicating with the distillation extraction tank 1, and a first valve 407 for opening and closing is provided on the fourth channel 406. When the pressure rod 405 slides in the flow-dividing channel 401, the third channel 404 is communicated with the first channel 402, the second channel 403 and the fourth channel 406 respectively, and when the third channel 404 is communicated with the second channel 403, the first valve 407 is in a cut-off state.

[0049] The herbal volatile oil extraction device of this embodiment is provided with a shunt channel 401 and a pressure rod 405 in the valve body 4, so that the pressure rod 405 can divert the distillate at the lower part of the oil-water separation tank 3 to the distillate collection tank 5 and the volatile oil collection tank 6 respectively during the sliding process in the shunt channel 401, and can also connect the third channel 404 and the distillation extraction tank 1 by providing a fourth channel 406, so that the oil-water mixed liquid containing trace volatile oil in the oil-water separation tank 3 can flow back to the distillation extraction tank 1 for re-extraction, thereby improving the extraction efficiency of the volatile oil. In addition, by arranging multiple channels on the valve body 4, the position change of the pressure rod 405 can realize the layer-by-layer suction of the distillate layer, the oil-water mixed liquid layer and the volatile oil layer, which can further ensure the separation effect.

[0050] Based on the above overall introduction, an exemplary structure of the herbal volatile oil extraction device of this embodiment is as follows: Figure 1 to Figure 2As shown, the herbal volatile oil extraction device mainly consists of a distillate extraction tank for distillation, a condenser 2 for receiving evaporated gas in the distillate extraction tank and cooling it into liquid, a distillate collection tank 5 and a volatile oil collection tank 6 for respectively containing distillate and volatile oil. It is different from the prior art in that a pressure rod portion 405 and a valve body 4 are added, and connecting pipes are provided between each channel of the valve body 4 and each component to form a connection of the entire device.

[0051] It should be pointed out here that the herbal volatile oil extraction device of this embodiment can not only be used in experiments, extraction of Chinese herbal medicines, etc., but can also be used in large-scale volatile oil extraction systems, which can effectively improve the extraction efficiency of volatile oils and improve the extraction purity of volatile oils.

[0052] As a preferred implementation mode, Figure 1 and Figure 2 As shown, the pressure rod portion 405 is also connected to a driving member 7, and the driving member 7 is connected to the oil-water separation tank 3 through a mounting plate. The driving member 7 of this embodiment adopts a telescopic cylinder, and the driving member 7 is bolted to the mounting plate. The mounting plate of this embodiment can adopt a clamp-type clamp on the outside of the oil-water separation tank 3 to provide a mounting position for the driving member 7. By arranging the driving member 7 on the pressure rod portion 405, the sliding of the pressure rod portion 405 is facilitated, the structure is simple, and it is easy to implement. Of course, the driving member 7 is not limited to being installed on the oil-water separation tank 3, and can also be installed on, for example, the condenser 2 or other external carriers, which will not be repeated here.

[0053] Furthermore, if Figures 5 to 7 As shown, the pressure rod portion 405 includes a connecting portion 4051 connected to the power output end of the driving member 7, and a guide portion 4052 connected to the connecting portion 4051. The connecting portion 4051 is adapted to be arranged with the diverting channel 401, the cross section of the guide portion 4052 is smaller than the cross section of the connecting portion 4051, and a flow gap is formed between the guide portion 4052 and the inner wall of the diverting channel 401. A blocking portion 4053 is also provided at the lower part of the diverting portion 4052, the blocking portion 4053 is adapted to be arranged with the diverting channel 401, and the blocking portion 4053 and the connecting portion 4051 are driven to slide to block the first channel 402 and the second channel 403 respectively.

[0054] As Figure 6 and Figure 7 As shown, the pressure rod portion 405 is a cylindrical rod-shaped structure with steps, wherein the guide portion 4052 is respectively arranged between the connecting portion 4051 and the blocking portion 4053, and the pressure rod portion 4055 is provided with a plurality of steps. Figure 4 , Figure 6 and Figure 7 As shown, the liquid flowing from each channel into the branch channel 401 flows through the above-mentioned flow gap.

[0055] In this embodiment, the pressure rod portion 405 is configured as a connecting portion 4051, a guide portion 4052, and a blocking portion 4053, so that the liquid flows in the flow gap of the diversion channel 401, reducing the flow cross section, which can effectively avoid the disadvantage of agitation when the oil-water mixed liquid layer and the other two layers are alternately switched, causing the diversion liquid to be impure, and further improve the extraction effect of volatile oil.

[0056] As a specific implementation method, Figure 3 and Figure 4 As shown, along the height direction of the diverter channel 401, the first channel 402, the third channel 404, the fourth channel 406 and the second channel 403 are arranged in sequence from bottom to top. The first channel 402 is arranged along the extension direction of the diverter channel 401 and is connected to the diverter channel 401. The second channel 403, the third channel 404 and the fourth channel 406 are respectively intersected and connected with the diverter channel 401. Figure 4 and Figure 7 As shown, the first channel 402 of this embodiment is located directly below the diversion channel 401, and the first channel 402 and the diversion channel 401 have the same diameter and are concentrically arranged.

[0057] Still Figure 4 and Figure 7 As shown, when the blocking portion 4053 pushes out of the first channel 402, the connecting portion 4051 blocks the fourth channel 406 and the second channel 403, and the third channel 404 is connected to the first channel 402. At this time, the distillate at the lower part of the oil-water separation tank 3 is poured into the distillate collection tank 5 for distillate collection.

[0058] When the distillate is collected, the driving member 7 drives the pressure rod to move upward, the blocking part 4053 blocks the first channel 402, and the connecting part 4051 blocks the second channel 403. At this time, the oil-water mixed layer in the middle layer enters the distillation extraction tank 1 through the fourth channel 406 for re-evaporation.

[0059] When the oil-water mixed layer is collected, the driving member 7 drives the pressure rod to continue to move upward, and the connecting portion 4051 moves to the top of the second channel 403. At this time, the first valve 407 is in a closed state, and the third channel 404 is connected with the second channel 403, so that the volatile oil is transported from the second channel 403 to the volatile oil collection tank 6. In order to facilitate the smooth transportation of the volatile oil, a vacuum device can also be connected to the middle of the connecting pipe between the second channel 403 and the volatile oil collection tank 6, and a shut-off valve for opening and closing is also required on the connecting pipe to be connected when collecting the volatile oil.

[0060] In order to improve the collection effect of volatile oil, an electronic pressure gauge can be installed on the third channel 404 to detect the pressure flowing out of the third channel 404, so as to judge the collection status of distillate, oil-water mixture and volatile oil. Alternatively, an online density meter for detecting density can be installed on the third channel 404 to more accurately judge the changes of the above-mentioned collected liquids with different densities. The sensing signal can be transmitted to, for example, a control system through the sensing of the pressure gauge or the online density meter. The control system is electrically connected to the driving member 7 and can drive the pressure rod 405 to move in time. The control system of this embodiment adopts, for example, a PLC or a control instrument used in the prior art, which will not be described in detail here.

[0061] In addition, in order to facilitate the arrangement of the connecting pipes of the distillate collecting tank 5 and the volatile oil collecting tank 6, as shown in FIG. Figure 3 and Figure 4 As shown, the third channel 404 and the second channel 403 are respectively arranged on opposite sides of the valve body 4. This prevents the pipelines on the same side from getting stuck with each other, and can effectively prevent the connection pipe from being bent into a dead angle and causing breakage or blockage.

[0062] And, if Figure 3 and Figure 4 As shown, a second valve for opening and closing is provided on the second channel 403. The second valve can be provided to facilitate the replacement of the volatile oil collection tank 6 and improve the applicability.

[0063] As a preferred implementation mode, Figure 2 As shown, the inner wall of the oil-water separation tank 3 is connected with a baffle 8, and the baffle 8 divides the inner cavity of the oil-water separation tank 3 into an upper cavity and a lower cavity. A connecting hole 801 for connecting the upper cavity and the lower cavity is provided along the edge of the baffle 8. By arranging the baffle 8 in the oil-water separation tank 3 and arranging the connecting hole 801 on the edge of the baffle 8, the oil-water mixed liquid falling from the condenser 2 is prevented from impacting the liquid that has been stationary at the bottom, which not only enables the collection of the distillate during the distillation process, but also prevents the separated upper volatile oil from splashing due to the impact and causing the volatile oil to adhere to the inner wall of the oil-water separation tank 3.

[0064] Furthermore, combined with Figure 2 and Figure 8 As shown, the baffle 8 includes a protruding portion that is bent upward, and a horizontally arranged flange portion 802 connected to the edge of the protruding portion. The side of the flange portion 802 abuts against the inner wall of the oil-water separation tank 3, and at least one connecting hole 801 is arranged at the edge of the flange portion 802. The connecting holes 801 in this embodiment are set to 10, and the specific number can be adjusted as needed. By setting the flange portion 802, the condensate falling from the protruding portion can be collected along the flange, and flow downward along the inner wall of the oil-water separation tank 3 through the connecting hole 801, thereby effectively avoiding the defect that the liquid left above continuously impacts the oil layer, which easily causes the oil layer to be broken into oil droplets and adsorbed on the inner wall of the collection tube.

[0065] As a more specific implementation method, Figure 2 and Figure 8 As shown, the protruding portion includes a horizontal portion 804 disposed in the middle, and an inclined portion 803 connected to the edge of the horizontal portion 804. The cross section of the inclined portion 803 is gradually increased downward from the horizontal portion 804. The baffle 8 of this embodiment is a circular rotating body, and of course in other embodiments, it can also be adaptively adjusted according to the structure of the inner wall of the oil-water separation tank 3.

[0066] By setting the horizontal portion 804 at the top of the protrusion, the small water droplets that rebound in the inclined direction when the water droplets act on the horizontal portion 804 can be reduced, thereby effectively avoiding the disadvantage of small water droplets adhering to the inner wall of the oil-water separation tank 3, and the accumulated liquid can flow smoothly to the flange through the inclined portion 803, and slowly flow downward through the connecting hole 801 to avoid splashing. In addition, with such a configuration, when the oil-water separation tank 3 is stationary, the volatile oil can slowly rise along the connecting hole 801, thereby improving the separation effect.

[0067] Of course, in order to increase the rising speed of the volatile oil through the baffle 8, a plurality of smaller through holes can be provided on the inclined portion 803 and the flange of the baffle 8 to avoid liquid impact and improve the oil-water separation efficiency. The diameter of the through hole is adjusted according to the size of the baffle 8 and is not limited here.

[0068] The herbal volatile oil extraction device of this embodiment is provided with a shunt channel 401 and a pressure rod 405 in the valve body 4, so that the pressure rod 405 can divert the distillate located at the lower part of the oil-water separation tank 3 to the distillate collection tank 5 and the volatile oil collection tank 6 respectively during the sliding process in the shunt channel 401, and can also connect the third channel 404 and the distillation extraction tank 1 by providing a fourth channel 406, so that the oil-water mixed liquid containing trace volatile oil in the oil-water separation tank 3 can flow back to the distillation extraction tank 1 for re-extraction, thereby improving the extraction efficiency of the volatile oil. In addition, by arranging multiple channels on the valve body 4, the position change of the pressure rod 405 can realize the layer-by-layer suction of the distillate layer, the oil-water mixed liquid layer and the volatile oil layer, which can further ensure the separation effect.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A herbal volatile oil extraction device, comprising a distillation extraction tank (1) and a condenser (2), characterized in that: It also includes an oil-water separation tank (3) connected to the lower portion of the condenser (2), a valve body (4) for diverting the oil-water separation tank (3), and a distillate collection tank (5) and a volatile oil collection tank (6) respectively connected to the valve body (4); The valve body (4) is provided with a flow dividing channel (401), and a first channel (402), a second channel (403) and a third channel (404) leading from the flow dividing channel (401) to the distillate collecting tank (5), the volatile oil collecting tank (6) and the bottom of the oil-water separation tank (3); The valve body (4) is also provided with a pressing rod (405) sliding along the diversion channel (401), and a fourth channel (406) communicating with the distillation extraction tank (1), and the fourth channel (406) is provided with a first valve (407) for opening and closing; When the pressure rod portion (405) slides in the diversion channel (401), the third channel (404) is connected with the first channel (402), the second channel (403) and the fourth channel (406) respectively; when the third channel (404) is connected with the second channel (403), the first valve (407) is in a cut-off state.

2. The herbal volatile oil extraction device according to claim 1, characterized in that: The pressure rod portion (405) is also connected to a driving member (7), and the driving member (7) is connected to the oil-water separation tank (3) via a mounting plate.

3. The herbal volatile oil extraction device according to claim 2, characterized in that: The pressure rod portion (405) comprises a connecting portion (4051) connected to the power output end of the driving member (7), and a flow guide portion (4052) connected to the connecting portion (4051); The connecting portion (4051) is adapted to be arranged with the diverting channel (401), the cross section of the guide portion (4052) is smaller than the cross section of the connecting portion (4051), and a flow gap is formed between the guide portion (4052) and the inner wall of the diverting channel (401); A blocking portion (4053) is also provided at the lower part of the guide portion (4052), and the blocking portion (4053) is adapted to be arranged with the diversion channel (401), and the blocking portion (4053) and the connecting portion (4051) are driven to slide to respectively block the first channel (402) and the second channel (403).

4. The herbal volatile oil extraction device according to claim 3, characterized in that: Along the height direction of the diversion channel (401), the first channel (402), the third channel (404), the fourth channel (406) and the second channel (403) are arranged in sequence from bottom to top; The first channel (402) is arranged along the extension direction of the diversion channel (401) and is in communication with the diversion channel (401); The second channel (403), the third channel (404) and the fourth channel (406) are respectively intersected and connected with the diversion channel (401).

5. The herbal volatile oil extraction device according to claim 3, characterized in that: The third channel (404) and the second channel (403) are respectively arranged on opposite sides of the valve body (4).

6. The herbal volatile oil extraction device according to claim 3, characterized in that: The second channel (403) is provided with a second valve for opening and closing.

7. The herbal volatile oil extraction device according to claim 3, characterized in that: The inner wall of the oil-water separation tank (3) is connected to a baffle (8), and the baffle (8) divides the inner cavity of the oil-water separation tank (3) into an upper cavity and a lower cavity; A connecting hole (801) for connecting the upper cavity and the lower cavity is provided along the edge of the baffle (8).

8. The herbal volatile oil extraction device according to claim 7, characterized in that: The baffle (8) comprises a protruding portion bent upward, and a horizontally arranged flange portion (802) connected to the edge of the protruding portion; The side of the flanged portion (802) abuts against the inner wall of the oil-water separation tank (3), and at least one of the connecting holes (801) is arranged on the edge of the flanged portion (802).

9. The herbal volatile oil extraction device according to claim 8, characterized in that: The protruding portion includes a horizontal portion (804) disposed in the middle, and an inclined portion (803) connected to the edge of the horizontal portion (804); The cross section of the inclined portion (803) is gradually increased downward from the horizontal portion (804).

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