Essential oil distillation extraction device

Abstract

The invention provides an essential oil distillation extraction device. The essential oil distillation extraction device comprises a distillation kettle, the upper end of the distillation kettle is communicated with a charging pipe, a liquid adding pipe and a steam pipe, and the lower end is communicated with a deslagging pipe; a driving motor is arranged at the upper end of the distillation kettle; a power output shaft of the motor is connected with a rotating shaft downwards extending into the kettle; a fixed grinding disc is horizontally arranged in the middle of the kettle, a through hole is formed in the middle of the fixed grinding disc, and a backflow stirring barrel is vertically arranged at the through hole; the fixed grinding disc is provided with a plurality of lower limber holes, and the upper end of the fixed grinding disc is movably provided with a movable grinding disc driven by a rotating shaft to rotate and is also provided with a plurality of upper limber holes. The free end of the steam pipe is communicated with the inlet end of the condenser, the outlet end of the condenser is connected with a separation cylinder through a liquid outlet pipe, the lower end of the separation cylinder is communicated with a liquid discharge pipe and provided with a valve, and the middle of the separation cylinder is communicated with an essential oil pipe. The raw materials can be continuously ground during distillation extraction, high extraction rate and high production efficiency are achieved, and the economical efficiency, stability and sustainability of essential oil production are improved.

Description

Technical Field

[0001] This invention belongs to the technical field of essential oil extraction equipment, and relates to an essential oil distillation extraction device. Background Technology

[0002] In the field of natural plant resource development and utilization, essential oils, due to their unique aroma and significant biological activities (such as antibacterial, antioxidant, and nerve-soothing properties), are widely used in cosmetics, pharmaceuticals, food additives, and aromatherapy. Currently, the main methods for extracting essential oils from plant raw materials include steam distillation, solvent extraction, supercritical CO2 extraction, and cold pressing. Among these, steam distillation remains the most widely used and mature essential oil extraction process in industrial production due to its advantages such as low equipment investment, simple operation, no organic solvent residue, and suitability for large-scale production. For example, distillation is often used to extract essential oil from ginger lily.

[0003] Studies have shown that appropriately reducing the particle size of raw materials can significantly improve the efficiency of essential oil extraction. This is because smaller particles result in a larger specific surface area per unit mass of material, leading to a more thorough contact interface between vapor or solvent and plant tissue. Simultaneously, the cell wall structure is more easily broken under mechanical force, thereby accelerating the diffusion rate of essential oil components from the cell interior to the external medium. For example, pulverizing aromatic plants such as rosemary or peppermint to 40–60 mesh can increase the essential oil extraction rate by 20%–50% compared to uncrushed or coarsely crushed raw materials, while also significantly shortening the extraction time.

[0004] However, an excessive pursuit of finer powder can also lead to new process bottlenecks. When raw material particles are too fine (e.g., below 80–100 mesh), they are prone to agglomeration, clumping, and bed compaction during distillation due to steam humidification or their own sticky components (such as resins, colloids, polysaccharides, etc.). This severely hinders the uniform penetration and flow of steam in the material layer, creating "steam short circuits" or "dead zones," which in turn reduces the efficiency of essential oil release. In addition, excessively fine powder is easily carried into the condensation system by the steam, causing pipe blockage, difficulty in oil-water separation, and loss of essential oil, increasing the difficulty of post-processing and production costs. Therefore, existing distillation processes often fall into a dilemma of "low efficiency for coarse particles, poor flow for fine particles" when controlling the particle size of raw materials. Summary of the Invention

[0005] The purpose of this invention is to provide an essential oil distillation extraction device that can continuously grind raw materials during the distillation extraction process, achieving high extraction rate and high production efficiency, thereby improving the economy, stability and sustainability of essential oil production.

[0006] To solve the above-mentioned technical problems, the present invention provides an essential oil distillation extraction device, including a distillation kettle, the upper end of which is connected to a feeding pipe, a liquid adding pipe and a steam pipe, the lower end of which is connected to a slag discharge pipe, a valve being provided on the slag discharge pipe, a heating jacket being fitted over the distillation kettle, and a heat source inlet pipe and a heat source outlet pipe being respectively connected to the upper and lower sides of the heating jacket, and a drive motor being installed at the upper end of the distillation kettle, the power output shaft of which is connected to a rotating shaft extending downward into the distillation kettle;

[0007] A fixed grinding disc is horizontally arranged in the middle of the distillation vessel. A through hole is opened through the middle of the fixed grinding disc. A reflux stirring cylinder with openings at both the top and bottom is vertically arranged at the through hole of the fixed grinding disc. A spiral blade is connected to the lower end of the rotating shaft on the outer periphery inside the reflux stirring cylinder. Several lower water passage holes are opened through the fixed grinding disc. A movable grinding disc driven to rotate by the rotating shaft is movably arranged at the upper end of the fixed grinding disc. A rotating hole is opened in the middle of the movable grinding disc and rotatably connected to the reflux stirring cylinder. Several upper water passage holes are opened through the movable grinding disc.

[0008] An essential oil condenser is provided outside the distillation vessel. The free end of the steam pipe is connected to the inlet end of the essential oil condenser. The outlet end of the essential oil condenser is connected to a separation cylinder through a liquid outlet pipe. The lower end of the separation cylinder is connected to a drain pipe, and a valve is provided on the drain pipe. An essential oil pipe is connected to the middle of the separation cylinder.

[0009] By adopting the above technical solution, the device operates by first feeding the plant material into the feeding hopper, where it slides down the inclined bottom of the hopper into the distillation vessel under its own weight. An appropriate amount of distilled water or solvent is added to the distillation vessel through the liquid addition pipe. The heating equipment connected to the heat source inlet pipe is then activated, introducing steam or heat transfer oil into the sealed cavity of the heating jacket. Heat conduction is used to uniformly heat the material inside the distillation vessel. During the heating process, the drive motor is activated, causing the rotating shaft to rotate. The spiral blades on the shaft continuously lift the solid-liquid mixture at the bottom of the distillation vessel upwards to above the fixed grinding disc.

[0010] When the shaft rotates, it drives the movable grinding disc to rotate relative to the fixed grinding disc. The material flows between the two discs through the water holes on the fixed and movable grinding discs. During the process of the movable grinding disc rotating relative to the fixed grinding disc, the material is ground and broken, and the cell wall structure is more easily broken, thereby accelerating the diffusion rate of essential oil components from the inside of the cell to the external medium.

[0011] The mixed vapors produced during distillation enter the essential oil condenser through a steam pipe, where they are condensed. The condensed liquid mixture then flows into a separator through a drain pipe. Inside the separator, because the essential oil is less dense than water, it floats to the top and flows out through the essential oil pipe, while the water is drained out through the drain pipe at the bottom. After distillation, the manual valve on the slag discharge pipe is opened to remove the solid-liquid mixture residue.

[0012] The invention is further configured such that the upper end of the feeding pipe is connected to a feeding hopper, the upper end of the feeding hopper is provided with a mounting frame, a telescopic motor is mounted on the mounting frame facing the feeding pipe, a discharge motor is mounted on the telescopic shaft of the telescopic motor facing the feeding pipe, the power output axis of the discharge motor is axially connected to a telescopic shaft extending into the feeding pipe, the portion of the telescopic shaft that can extend into the feeding pipe is provided with spiral discharge blades, and a plugging ring is provided on the telescopic shaft away from the feeding pipe, and the telescopic motor drives the telescopic shaft to extend in the direction of the feeding pipe to block the feeding pipe.

[0013] The present invention is further configured such that the bottom of the feeding hopper is inclined and converged towards the feeding pipe.

[0014] The invention is further configured to include a vacuum pump, wherein the upper end of the separation cylinder is connected to a negative pressure pipe, and the free end of the negative pressure pipe is connected to the inlet end of the vacuum pump.

[0015] The invention is further configured such that a transmission device is provided at the top of the distillation vessel, the transmission device including an upper connecting plate connected to the top of the distillation vessel and a lower connecting plate connected to the lower side of the upper connecting plate via multiple connecting shafts. Both the upper and lower connecting plates have through holes for the rotating shaft to pass through and be rotatably connected thereto. Multiple circumferentially distributed planetary gears are rotatably connected between the upper and lower connecting plates. The rotating shaft is provided with a drive gear meshing with each planetary gear inside the transmission device. The transmission device is fitted with a transmission sleeve rotatably connected thereto. The inner wall of the transmission sleeve is provided with an annular internal gear meshing with each planetary gear. The transmission sleeve is connected to the movable grinding disc via multiple circumferentially distributed connecting arms.

[0016] The present invention is further configured such that a pressure sensor for detecting the internal pressure is provided at the upper end of the distillation vessel.

[0017] The present invention is further configured such that a plurality of ultrasonic vibrators are installed at the bottom of the distillation vessel, and the working head of each ultrasonic vibrator extends upward into the distillation vessel.

[0018] The present invention is further configured such that the essential oil condenser includes a condensing cylinder and a spiral condensing tube disposed inside the condensing cylinder, the upper end of the spiral condensing tube being connected to the free end of the steam pipe, the lower end of the spiral condensing tube being connected to the upper end of the liquid outlet pipe, and the upper and lower parts of the condensing cylinder being respectively connected to an inlet pipe and an outlet pipe.

[0019] The present invention is further configured such that valves are provided on both the liquid addition pipe and the steam pipe.

[0020] The present invention is further configured such that the lower end of the distillation vessel is provided with a plurality of circumferentially distributed support legs.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] Firstly, this device, by using a combination of a movable and a fixed grinding disc, continuously grinds the plant raw materials during distillation, effectively solving the dilemma of raw material particle size control in traditional processes. The movable grinding disc rotates relative to the fixed disc under the drive of a rotating shaft, ensuring that the material is subjected to uniform mechanical force as it flows between the two discs. This continuously grinds and pulverizes the raw material particles, allowing the ground material to be directly mixed into the solvent. This avoids agglomeration caused by excessive fineness and maximizes the specific surface area of ​​the material through continuous grinding, ensuring sufficient contact between the steam and the plant tissue. When using this device to extract rosemary essential oil, the extraction rate is significantly improved compared to traditional fixed-particle-size processes, and the extraction time is effectively shortened.

[0023] Secondly, the ultrasonic vibrator equipped with the device can generate high-frequency micro-amplitude vibrations, further disrupting the plant cell wall structure and promoting the release of essential oil components. The linkage control between the pressure sensor and the vacuum pump keeps the pressure inside the distillation vessel stable within the optimal range (0.08-0.12MPa), preventing both pyrolysis of essential oils caused by high pressure and insufficient steam penetration caused by low pressure. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a partial sectional view used to show the internal structure of the feeding hopper;

[0026] Figure 3 It is a partial sectional view used to show the internal structure of the distillation vessel;

[0027] Figure 4 It is a partial sectional view mainly used to show the internal structure of the transmission.

[0028] Figure 5 Used to demonstrate the connection between the fixed grinding disc and the reflux mixing drum;

[0029] Figure 6 This is a partial cross-sectional view used to show the spiral condenser tube inside the separator.

[0030] The components include: 1. Distillation vessel; 2. Support leg; 3. Feeding pipe; 4. Liquid feeding pipe; 5. Steam pipe; 6. Slag discharge pipe; 7. Feeding hopper; 8. Mounting frame; 9. Telescopic motor; 10. Feeding motor; 11. Telescopic shaft; 12. Spiral feeding blade; 13. Plug ring; 14. Heating jacket; 15. Heat source inlet pipe; 16. Heat source outlet pipe; 17. Drive motor; 18. Rotating shaft; 19. Fixed grinding disc; 20. Reflux stirring drum; 21. Spiral blade; 22. Lower water passage; 23. Movable grinding disc. 24. Grinding disc; 25. Rotary hole; 26. Upper water passage hole; 27. Upper connecting plate; 28. Connecting shaft; 29. ​​Lower connecting plate; 20. Planetary gear; 31. Drive gear; 32. Transmission sleeve; 33. Ring internal gear; 34. Ultrasonic vibrator; 35. Condenser; 36. Spiral condenser tube; 37. Liquid outlet pipe; 38. Water inlet pipe; 39. Water outlet pipe; 40. Separator; 41. Drain pipe; 42. Essential oil pipe; 43. Vacuum pump; 44. Negative pressure pipe; 45. Pressure sensor; 46. Connecting arm. Detailed Implementation

[0031] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed explanation of the essential oil distillation and extraction apparatus proposed in this invention. The advantages and features of this invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this invention. The same or similar reference numerals in the drawings represent the same or similar parts.

[0032] Example, refer to Figure 1-6 This paper details the specific structure and working principle of an essential oil distillation extraction device. The main body of the device includes a distillation vessel 1, with five evenly distributed supporting legs 2 welded to its lower end. The bottom of each supporting leg 2 is equipped with anti-slip pads to enhance the stability of the device. The upper end of the distillation vessel 1 is connected to a feeding pipe 3, a liquid adding pipe 4, and a steam pipe 5. The feeding pipe 3 is used to add raw materials, the liquid adding pipe 4 is used to add distilled water or solvent, and the steam pipe 5 is used to discharge the mixed steam generated during distillation. Each of the liquid adding pipe 4 and the steam pipe 5 is independently equipped with a valve to control the on / off state of each pipe. The lower end of the distillation vessel 1 is connected to a slag discharge pipe 6, which is also equipped with a valve for discharging the solid-liquid mixture residue after distillation.

[0033] A feeding hopper 7 is connected to the upper end of the feeding pipe 3. The feeding hopper 7 has a funnel-shaped structure, and its bottom slopes and converges towards the feeding pipe 3, allowing the raw materials to slide down naturally by gravity. A portal frame 8 is welded to the upper end of the feeding hopper 7. A telescopic motor 9 is fixedly installed on the crossbeam of the mounting frame 8 towards the feeding pipe 3. A feeding motor 10 is installed at the end of the telescopic shaft 11 of the telescopic motor 9 through a coupling. The power output shaft of the feeding motor 10 is connected to a telescopic shaft 11 that extends into the feeding pipe 3. The part of the shaft inside the feeding pipe 3 has an integrally formed spiral feeding blade 12, which can force the raw materials to be conveyed. The telescopic motor 9 is used to drive the telescopic shaft 11 to extend and retract back and forth, and the feeding motor 10 is used to drive the telescopic shaft 11 to rotate and feed the materials. A plugging ring 13 is fixedly sleeved at the end of the telescopic shaft 11 away from the feeding pipe 3. When the telescopic motor 9 drives the telescopic shaft 11 to extend towards the feeding pipe 3, the plugging ring 13 can tightly fit against the inner wall of the feeding pipe 3 to achieve sealing and blockage of the feeding pipe 3 and prevent steam leakage during distillation. When the telescopic motor 9 drives the plugging ring 13 to extend completely from the feeding pipe, the particles can enter the feeding pipe.

[0034] A heating jacket 14 is fixedly fitted around the outside of the distillation vessel 1. The heating jacket 14 is made of double-layer stainless steel, forming a sealed cavity between the two layers. A heat source inlet pipe 15 and a heat source outlet pipe 16 are welded outwards at its upper and lower ends, respectively, allowing steam or heat transfer oil to be introduced as the heating medium. The material inside the distillation vessel 1 is heated uniformly through heat conduction. A drive motor 17 is installed at the center of the upper end face of the distillation vessel 1. The power output shaft of the drive motor 17 passes through the sealed bearing at the top of the vessel and is connected to a rotating shaft 18 that extends vertically downwards into the distillation vessel 1 via a coupling. A fixed grinding disc 19 is horizontally arranged in the middle of the distillation vessel 1. The disc is fixedly connected to the inner wall of the vessel. A circular through hole is opened through the middle of the fixed grinding disc 19. A cylindrical reflux stirring tube 20 with openings at both the top and bottom is vertically welded to the fixed grinding disc 19 at the through hole. The lower end of the rotating shaft 18 extends into the reflux stirring tube 20. A spiral blade 21 is fixedly connected to its outer circumference by welding. It can stir and lift the material in the tube, so that the solid-liquid mixture at the bottom of the distillation vessel 1 is continuously lifted upward to the top of the fixed grinding disc 19. A number of circular lower water passage holes 22 are evenly opened through the fixed grinding disc 19. A movable grinding disc 23 is movably installed at the upper end of the fixed grinding disc 19. The movable grinding disc 23 can rotate freely around the reflux stirring cylinder 20. A rotating hole 24 with clearance fit with the reflux stirring cylinder 20 is opened in the middle of the disc. A number of upper water passage holes 25 are also evenly opened on the disc surface. The material can flow between the two discs through the water passage holes. When the movable grinding disc 23 rotates relative to the fixed grinding disc 19, it can grind the material entering between the two. The lifted solid-liquid mixture can also pass downward through the upper water passage holes 25 and the lower water passage holes 22 under the action of gravity.

[0035] A transmission device is fixedly installed at the top of the distillation vessel 1. This transmission device includes an upper connecting plate 26 welded to the top of the distillation vessel 1, and a lower connecting plate 28 welded to the lower side of the upper connecting plate 26 via three evenly distributed connecting shafts 27. Both the upper connecting plate 26 and the lower connecting plate 28 have through holes at their centers for the rotating shaft 18 to pass through and rotate with it via bearings. Three planetary gears 29 evenly distributed in a circle are rotatably connected between the upper connecting plate 26 and the lower connecting plate 28 via bearing seats. The shaft 18 located inside the transmission device is keyed to a drive gear 30 that meshes with all three planetary gears 29. A transmission sleeve 31 is fitted around the outside of the transmission device and rotates with it via bearings. The inner wall of the transmission sleeve 31 is machined with a ring internal gear 32 that meshes with all three planetary gears 29. The drive gear 30 drives the planetary gears 29 to rotate, thereby driving the transmission sleeve to rotate in the opposite direction around the rotating shaft 18. The outer wall of the transmission sleeve is welded and fixed to the upper surface of the movable grinding disc 23 by three circumferentially distributed connecting arms 45, thereby driving the movable grinding disc 23 and the rotating shaft 18 to rotate in opposite directions, so as to achieve grinding and crushing of materials.

[0036] Five ultrasonic vibrators 33 are evenly bolted to the bottom of the distillation vessel 1. The ultrasonic vibrators 33 operate at a frequency of 20-40kHz. The working head of each ultrasonic vibrator 33 extends upwards through the bottom seal and into the distillation vessel 1, allowing for ultrasonic-assisted extraction of the material inside, promoting the rupture of plant cells and the release of essential oils. An essential oil condenser is located on the right side of the outside of the distillation vessel 1. The condenser includes a condenser cylinder 34 and a spiral condenser tube 35 located inside the condenser cylinder 34. The spiral condenser tube 35 is made of copper, with its upper end connected to the free end of the steam pipe 5 via a flange. A liquid outlet pipe 36 is welded to its lower end, extending downwards through the condenser cylinder 34 to discharge the condensed mixed liquid. A water inlet pipe 37 and a water outlet pipe 38 are welded outwards from the lower left and upper right ends of the condenser cylinder 34, respectively, forming a bottom-in, top-out cooling water circulation path to ensure effective condensation.

[0037] The outlet of the essential oil condenser is connected to a separation cylinder 39 for oil-water separation via a liquid outlet pipe 36. The separation cylinder 39 is made of transparent glass for easy observation of the internal separation process. Its lower conical bottom is connected to a drain pipe 40, which has a valve for precise adjustment of the discharge rate. An essential oil pipe 41 is obliquely connected to the side of the middle of the separation cylinder 39. Since the density of essential oil is less than water, it floats on the surface and flows out through the essential oil pipe 41. The device also includes a vacuum pump 42. A negative pressure pipe 43, connected to the interior of the separation cylinder 39, is welded to the top of the separation cylinder 39, with the other end connected to the inlet of the vacuum pump 42. The vacuum pump 42 reduces the gas pressure within the distillation system, achieving reduced pressure distillation and lowering the boiling point of the essential oil. A pressure sensor 44 is also installed on the upper surface of the distillation vessel 1, with its probe extending into the vessel. This sensor monitors the internal pressure of the distillation vessel 1 in real time and transmits the data to the control system, ensuring that the distillation process is carried out within the set pressure range.

[0038] Working principle: When the device is working, the plant raw material is first put into the feeding hopper 7. The raw material slides down the inclined bottom of the feeding hopper 7 under its own gravity into the feeding pipe 3. At the same time, the feeding motor 10 drives the telescopic shaft 11 to rotate, and the spiral feeding blades 12 forcefully convey the raw material into the distillation kettle 1. Then, the telescopic motor 9 is started, driving the telescopic shaft 11 to move the plugging ring 13 into the direction of the feeding pipe. When the plugging ring 13 is tightly attached to the inner wall of the feeding pipe 3, the feeding pipe 3 is sealed to prevent steam leakage during the distillation process.

[0039] Add an appropriate amount of distilled water or solvent to the distillation vessel 1 through the liquid addition pipe 4, and then close the manual valves on the liquid addition pipe 4 and the feed pipe 3. Start the heating equipment connected to the heat source inlet pipe 15, and introduce steam or heat transfer oil into the sealed cavity of the heating jacket 14 to uniformly heat the material in the distillation vessel 1 through heat conduction. During the heating process, start the drive motor 17 to drive the rotating shaft 18 to rotate. The spiral blades 21 on the rotating shaft 18 continuously lift the solid-liquid mixture at the bottom of the distillation vessel 1 upward to above the fixed grinding disc 19.

[0040] When the rotating shaft 18 rotates, the drive gear 30 on it drives the three planetary gears 29 to rotate, which in turn drives the transmission sleeve to rotate in the opposite direction around the rotating shaft 18. The transmission sleeve drives the movable grinding disc 23 to rotate in the opposite direction to the rotating shaft 18 through the connecting arm 45. The material flows between the two discs through the water holes on the fixed grinding disc 19 and the movable grinding disc 23. During the rotation of the movable grinding disc 23 relative to the fixed grinding disc 19, the material is ground and broken, and the cell wall structure is more easily broken, thereby accelerating the diffusion rate of essential oil components from the cell to the external medium.

[0041] Simultaneously, the ultrasonic vibrator 33 at the bottom of the distillation vessel 1 is activated to perform ultrasonic-assisted extraction of the material inside the vessel, further promoting the rupture of plant cells and the release of essential oils. The mixed steam generated during distillation enters the spiral condenser tube 35 of the essential oil condenser through the steam pipe 5. Cooling water enters from the inlet pipe 37 on the lower side of the condenser cylinder 34 and flows out from the outlet pipe 38 on the upper side, forming a bottom-in, top-out cooling water circulation path to condense the mixed steam. The condensed mixed liquid flows into the separation cylinder 39 through the drain pipe 40.

[0042] Inside the separator 39, because the essential oil is less dense than water, it floats to the top and flows out through the essential oil pipe 41, while the water is discharged from the drain pipe 40 at the bottom. The vacuum pump 42 is activated, reducing the pressure within the distillation system via the negative pressure pipe 43 to achieve reduced pressure distillation and lower the boiling point of the essential oil. The pressure sensor 44 monitors the internal pressure of the distillation vessel 1 in real time and transmits the data to the control system to ensure the distillation process is conducted within the set pressure range. After distillation, the manual valve on the slag discharge pipe 6 is opened to discharge the solid-liquid mixture residue.

[0043] It should also be noted that all terms such as "set up" and similar descriptive words in this application (especially the specification) indicate that two structures have or exist a connection relationship. However, the specific means by which the two are connected are not limited in detail, and are usually conventional connection methods. That is, the means should be understood as prior art and do not need to be elaborated. For example, "m is set up with n" only indicates that structure m has structure n, and whether the two are connected by welding, riveting, adhesive, or integral molding is within the scope of protection of this application. Similarly, "x is rotatably set up with y" only indicates that y and x can rotate relative to each other, and whether the two are connected by a bearing, or whether y directly passes through x and is rotatably connected to x, or other feasible methods, are all within the scope of protection of this application.

[0044] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. An essential oil distillation extraction apparatus, comprising a distillation vessel (1), wherein the upper end of the distillation vessel (1) is connected to a feeding pipe (3), a liquid feeding pipe (4), and a steam pipe (5), and the lower end of the distillation vessel (1) is connected to a slag discharge pipe (6), wherein a valve is provided on the slag discharge pipe (6), characterized in that, The distillation vessel (1) is covered with a heating sleeve (14). The upper and lower sides of the heating sleeve (14) are respectively connected to a heat source inlet pipe (15) and a heat source outlet pipe (16). A drive motor (17) is installed at the upper end of the distillation vessel (1). The power output shaft of the drive motor (17) is connected to a rotating shaft (18) that extends downward into the distillation vessel (1). A fixed grinding disc (19) is horizontally arranged in the middle of the distillation vessel (1). A through hole is opened through the middle of the fixed grinding disc (19). A reflux stirring cylinder (20) with openings at both the top and bottom is vertically arranged at the through hole of the fixed grinding disc (19). A spiral blade (21) is connected to the outer periphery of the reflux stirring cylinder (20) at the lower end of the rotating shaft (18). A number of lower water passage holes (22) are opened through the fixed grinding disc (19). A movable grinding disc (23) driven to rotate by the rotating shaft (18) is movably arranged at the upper end of the fixed grinding disc (19). A rotating hole (24) is opened in the middle of the movable grinding disc (23) and is rotatably connected to the reflux stirring cylinder (20). A number of upper water passage holes (25) are opened through the movable grinding disc (23). An essential oil condenser is provided outside the distillation vessel (1). The free end of the steam pipe (5) is connected to the inlet end of the essential oil condenser. The outlet end of the essential oil condenser is connected to a separation cylinder (39) through a liquid outlet pipe (36). The lower end of the separation cylinder (39) is connected to a drain pipe (40) downwards. A valve is provided on the drain pipe (40). An essential oil pipe (41) is connected to the middle part of the separation cylinder (39) outwards.

2. The essential oil distillation extraction apparatus according to claim 1, characterized in that, The upper end of the feeding pipe (3) is connected to the feeding hopper (7). The upper end of the feeding hopper (7) is provided with a mounting bracket (8). The mounting bracket (8) is mounted with a telescopic motor (9) facing the feeding pipe (3). The telescopic shaft (11) of the telescopic motor (9) is mounted with a feeding motor (10) facing the feeding pipe (3). The power output of the feeding motor (10) is axially connected to the telescopic shaft (11) that extends into the feeding pipe (3). The part of the telescopic shaft (11) that can extend into the feeding pipe (3) is provided with a spiral feeding blade (12). A plugging ring (13) is provided at the telescopic shaft (11) away from the feeding pipe (3). The telescopic motor (9) drives the telescopic shaft (11) to extend towards the feeding pipe (3) to block the feeding pipe (3).

3. The essential oil distillation extraction apparatus according to claim 2, characterized in that, The bottom of the feeding hopper (7) is inclined and converges towards the feeding pipe (3).

4. An essential oil distillation extraction apparatus according to any one of claims 1-3, characterized in that, It also includes a vacuum pump (42), and the upper end of the separation cylinder (39) is connected to a negative pressure pipe (43), the free end of the negative pressure pipe (43) is connected to the inlet end of the vacuum pump (42).

5. The essential oil distillation extraction apparatus according to claim 4, characterized in that, A transmission device is provided at the top of the distillation vessel (1). The transmission device includes an upper connecting plate (26) connected to the top of the distillation vessel (1) and a lower connecting plate (28) connected to the lower side of the upper connecting plate (26) through multiple connecting shafts (27). Both the upper connecting plate (26) and the lower connecting plate (28) have through holes for the rotating shaft (18) to pass through and rotate with it. Multiple planetary gears (29) are rotatably connected between the upper connecting plate (26) and the lower connecting plate (28). The rotating shaft (18) is provided with a drive gear (30) that meshes with each planetary gear (29) in the transmission device. The transmission device is covered with a transmission sleeve (31) that is rotatably connected with it. The inner wall of the transmission sleeve (31) is provided with an annular internal gear (32) that meshes with each planetary gear (29). The transmission sleeve is connected to the movable grinding disc (23) through multiple circumferentially distributed connecting arms (45).

6. The essential oil distillation extraction apparatus according to claim 4, characterized in that, The upper end of the distillation vessel (1) is equipped with a pressure sensor (44) for detecting the internal pressure.

7. The essential oil distillation extraction apparatus according to claim 1, characterized in that, The bottom of the distillation vessel (1) is equipped with multiple ultrasonic vibrators (33), and the working head of each ultrasonic vibrator (33) extends upward into the distillation vessel (1).

8. The essential oil distillation extraction apparatus according to claim 1, characterized in that, The essential oil condenser includes a condenser cylinder (34) and a spiral condenser tube (35) disposed inside the condenser cylinder (34). The upper end of the spiral condenser tube (35) is connected to the free end of the steam pipe (5), and the lower end of the spiral condenser tube (35) is connected to the upper end of the liquid outlet pipe (36). The upper and lower parts of the condenser cylinder (34) are respectively connected to an inlet pipe (37) and an outlet pipe (38).

9. The essential oil distillation extraction apparatus according to claim 1, characterized in that, Valves are provided on both the liquid addition pipe (4) and the steam pipe (5).

10. The essential oil distillation extraction apparatus according to claim 1, characterized in that, The lower end of the distillation vessel (1) is provided with multiple circumferentially distributed support legs (2).

Images