A multi-stage filtering device for herb essential oil

Abstract

The present application relates to the field of plant essential oil filtering, and discloses a multi-stage filtering device for herb essential oil, which comprises a multi-stage filtering mechanism, and the filtering mechanism comprises an oil inlet ring, a shell, an elastic screen, a rotating mechanism and a lifting mechanism; a plurality of oil inlet holes are arranged circumferentially on the oil inlet ring, and the elastic screen is tightly attached to the inner side of the oil inlet ring; plant essential oil flows to the elastic screen through the oil inlet holes, and flows to the next stage of the filtering mechanism after being filtered by the elastic screen; when the elastic screen is blocked, the position of the elastic screen corresponding to the oil inlet holes can be changed by rotating or lifting the elastic screen, so that the part of the elastic screen that has not been filtered serves as a 'new' screen to filter the plant essential oil, thereby greatly saving the time for cleaning the screen and improving the filtering efficiency of the plant essential oil; when the elastic screen is blocked in a large area, the elastic screen can be moved upward and cleaned uniformly by a spraying mechanism, and the spraying mechanism can act on the elastic screen at a close distance, so that the cleaning is convenient and the cleaning effect is good.

Description

Technical Field

[0001] This invention relates to the field of plant essential oil filtration, and in particular to a multi-stage filtration device for herbal plant essential oils. Background Technology

[0002] Multi-stage filtration of plant essential oils is a process that has been widely adopted in the fields of essential oil purification and cosmetic crude oil preparation in recent years. Its purpose is to remove solid impurities, gums, waxes and plant fragments left over from the pressing or distillation process, thereby improving the purity of essential oils, extending their shelf life, and meeting the stringent requirements of high-end applications such as cosmetics and fragrances for color, odor and impurities.

[0003] In the multi-stage filtration process of plant essential oils, the essential oils pass through multiple filter screens from top to bottom under gravity, causing impurities to be trapped on the screens, which easily become clogged. To address this technical problem, existing filtration devices use a flip-up filter screen combined with a spray mechanism to clean the screen. For example, patent CN211069239U discloses a multi-stage filtration device for herbal plant essential oils, which uses a flip-up filter screen structure. When the screen becomes clogged, it can be flipped 180°, allowing impurities to be removed through a spray mechanism. However, this structure has the following drawbacks: the multi-stage filter screens are flipped upside down inside the filter tank, and during cleaning, a spray mechanism is needed to rinse the screens from the oil inlet. On the one hand, there is a certain distance between the oil inlet and the filter screen, and there is generally no light inside the filter tank, making it difficult to align the flushing direction with the filtration area of ​​the filter screen (usually the middle of the filter screen). On the other hand, the flushing effect of the spray mechanism is greatly reduced for the lower filter screens, mainly because most of the water jet impact force of the spray mechanism is absorbed by the uppermost filter screen, resulting in poor cleaning effect for the lower filter screens. Furthermore, the cleaning of multi-stage filter screens has a sequential requirement. The uppermost filter screen needs to be flipped and cleaned first, and the impurities are collected by the next stage filter screen. Then the next stage filter screen is flipped and cleaned, and so on, resulting in extremely low cleaning efficiency.

[0004] Therefore, how to provide a multi-stage filtration device for plant essential oils with easy-to-clean filter screen is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-stage filtration device for herbal essential oils to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides a multi-stage filtration device for herbal essential oils, comprising a multi-stage filtration mechanism, wherein the filtration mechanism includes:

[0007] The oil inlet ring is a cylindrical structure with openings at the top and bottom. Multiple oil inlet holes are opened through the inner and outer surfaces of the oil inlet ring, and the multiple oil inlet holes are evenly arranged along the circumference of the oil inlet ring.

[0008] The housing is spaced apart on the outside of the oil inlet ring. The bottom of the housing has a bottom plate, which is connected to the outer edge of the bottom of the oil inlet ring. The outer side of the housing and the oil inlet ring form an essential oil filter groove.

[0009] The oil inlet pipe is connected to the plant essential oil at one end and to the essential oil filter tank at the other end.

[0010] An elastic screen, cylindrical in shape and coaxially arranged inside the oil inlet ring, has an outward expanding elastic tendency and is tightly attached to the inside of the oil inlet ring;

[0011] A rotating mechanism, connected to the elastic screen drive, is used to drive the elastic screen to rotate along the axis of the oil inlet ring;

[0012] A lifting mechanism is rotatably connected to the elastic screen, and a rotating mechanism is mounted on the lifting mechanism; the lifting mechanism is used to drive the elastic screen and the rotating mechanism to move up and down along the axis of the oil inlet ring.

[0013] The oil outlet cylinder is connected to the inner edge of the bottom of the oil inlet ring, and the oil outlet cylinder is connected to the oil inlet pipe of the next stage filtration mechanism.

[0014] Furthermore, the oil inlet hole is arranged near the upper edge of the oil inlet ring, and the other end of the oil inlet pipe is arranged near the bottom plate.

[0015] Furthermore, the oil inlet is arranged at an angle, with its higher end connected to the essential oil filter tank.

[0016] Furthermore, a slag discharge pipe communicating with an essential oil filter tank is provided on the outer side of the housing, and a valve is provided on the slag discharge pipe.

[0017] Furthermore, it also includes:

[0018] The oil outlet chassis is connected to the bottom of the oil outlet cylinder, the oil outlet chassis is connected to the oil outlet pipe, and the oil outlet pipe is connected to the oil inlet pipe of the next stage filtration mechanism.

[0019] Furthermore, an oil pump is installed on the oil outlet pipe.

[0020] Furthermore, the rotating mechanism includes:

[0021] A turntable is coaxially positioned above the elastic screen, with the top of the elastic screen embedded in the lower surface of the turntable, and the turntable is rotatably connected to the lifting mechanism.

[0022] An external gear ring is disposed on the outer edge of the turntable;

[0023] A rotary motor is mounted on the lifting mechanism, and a drive gear is provided at the output end of the rotary motor, which meshes with the external gear ring.

[0024] The area of ​​the elastic screen corresponding to the oil inlet is the normal filtration area, and the area of ​​the elastic screen between two adjacent oil inlets is the replacement filtration area. The normal filtration area and the replacement filtration area are connected, and the length of the replacement filtration area is greater than the length of the normal filtration area. The rotary motor is used to rotate the replacement filtration area to the position corresponding to the oil inlet and rotate the normal filtration area between two adjacent oil inlets.

[0025] Furthermore, it also includes:

[0026] The bearing is provided in the middle of the turntable, and the bearing is disposed in the mounting hole;

[0027] The connecting shaft is located inside the bearing, and its top end is connected to the lifting mechanism.

[0028] Furthermore, the lifting mechanism includes:

[0029] The top of the rotary motor and the top of the connecting shaft are both located on the lower surface of the top plate;

[0030] A lifting cylinder, connected to the top plate, is used to drive the top plate to move up and down along the axis of the oil inlet ring;

[0031] The normal filtration zone and the replacement filtration zone together form a ring-shaped filter bar. The elastic screen is composed of multiple filter bars. When the top plate moves up and down along the axis of the oil inlet ring, it can move different filter bars to the horizontal position where the oil inlet hole is located.

[0032] Furthermore, it also includes:

[0033] A spraying mechanism is arranged adjacent to the outer side of the housing. When the top plate moves upward, part of the elastic filter screen moves above the oil inlet ring. The spraying mechanism is used to spray and clean the elastic filter screen.

[0034] The present invention discloses the following technical effects:

[0035] 1. Multiple oil inlet holes are arranged circumferentially around the oil inlet ring. An elastic screen is tightly fitted to the inner side of the oil inlet ring. Plant essential oils flow through the oil inlet holes to the elastic screen, are filtered by the screen, and then flow to the next stage of filtration. When the elastic screen becomes clogged, its position relative to the oil inlet holes can be changed by rotating or raising the screen. This allows the unfiltered portion of the screen to act as a "new" screen for filtering the plant essential oils, significantly saving cleaning time and improving filtration efficiency. When the elastic screen has changed position multiple times and becomes heavily clogged, it can be raised using a lifting mechanism and cleaned uniformly by a spray mechanism. The spray mechanism acts on the elastic screen at close range, making cleaning convenient and effective, with promising application prospects and a wide range of applications.

[0036] 2. After entering the essential oil filter tank, the plant essential oil is located near the bottom plate. As more and more essential oil enters the filter tank, impurities settle on the bottom plate, and the level of the essential oil gradually rises. Eventually, it flows from the inlet to the elastic screen. Compared with existing technologies, this method allows large particles and heavier impurities to naturally settle to the bottom plate before filtration, thus reducing the risk of clogging the elastic screen. The impurities and residual essential oil settled on the bottom plate can be discharged through the slag discharge pipe.

[0037] 3. The rotating mechanism employs a gear ring mechanism, which allows for precise setting of the single rotation distance of the elastic screen based on the lengths of the normal filtration zone and the replacement filtration zone. This ensures that unfiltered elastic screens move to the oil inlet, while previously clogged elastic screens move between adjacent oil inlets. Furthermore, since the replacement filtration zone is longer than the normal filtration zone, the elastic screen can rotate multiple times, moving different sections along the length of the replacement filtration zone to the oil inlet to filter the plant essential oils.

[0038] 4. The lifting mechanism can simultaneously lift and lower the rotating mechanism and the elastic screen. After the lifting mechanism adjusts the up and down position of the elastic screen, the rotating mechanism can still drive the elastic screen to rotate, so that the elastic screen can be used over the largest possible area, thereby further reducing the cleaning frequency of the elastic screen and improving the filtration efficiency of plant essential oils. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the structure of the present invention;

[0041] Figure 2A schematic diagram showing the interaction between the rotating mechanism and the elastic screen;

[0042] Figure 3 This is a schematic diagram showing the fit between the elastic screen and the oil inlet ring.

[0043] Figure 4 This is a schematic diagram of the oil inlet ring fitting.

[0044] The components include: 1. Oil inlet ring; 101. Oil inlet hole; 2. Shell; 3. Oil filter tank; 4. Oil inlet pipe; 5. Elastic screen; 6. Oil outlet cylinder; 7. Slag discharge pipe; 8. Valve; 9. Oil outlet chassis; 10. Oil outlet pipe; 11. Oil pump; 12. Turntable; 13. External gear ring; 14. Rotary motor; 15. Drive gear; 16. Bearing; 17. Coupling; 18. Top plate; 19. Lifting cylinder. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] like Figures 1 to 4 As shown, this embodiment of the invention provides a multi-stage filtration device for herbal plant essential oils, including a multi-stage filtration mechanism, the filtration mechanism comprising:

[0048] The oil inlet ring 1 is a cylindrical structure with openings at the top and bottom. Multiple oil inlet holes 101 are provided on the inner and outer surfaces of the oil inlet ring 1. The multiple oil inlet holes 101 are evenly arranged along the circumference of the oil inlet ring 1.

[0049] The housing 2 is spaced out on the outside of the oil inlet ring 1. The bottom of the housing 2 has a bottom plate, which is connected to the outer edge of the bottom of the oil inlet ring 1. The outer side of the housing 2 and the oil inlet ring 1 form an essential oil filter groove 3.

[0050] Oil inlet pipe 4, one end is connected to plant essential oil, and the other end is connected to essential oil filter tank 3;

[0051] The elastic screen 5 is cylindrical and coaxially arranged inside the oil inlet ring 1. The elastic screen 5 has an outward expansion elastic tendency and is tightly attached to the inside of the oil inlet ring 1.

[0052] The rotating mechanism is connected to the elastic screen 5 for driving the elastic screen 5 to rotate along the axis of the oil inlet ring 1.

[0053] The lifting mechanism is rotatably connected to the elastic screen 5, and the rotating mechanism is set on the lifting mechanism; the lifting mechanism is used to drive the elastic screen 5 and the rotating mechanism to move up and down along the axis of the oil inlet ring 1.

[0054] The oil outlet cylinder 6 is connected to the inner edge of the bottom of the oil inlet ring 1, and the oil outlet cylinder 6 is connected to the oil inlet pipe 4 of the next stage filter mechanism.

[0055] In this embodiment, the multi-stage filtration mechanism uses elastic screens 5 with progressively decreasing apertures. The specific material of the elastic screens 5 can be flexibly selected according to actual needs, as long as the elastic screens 5 can adhere tightly to the oil inlet ring 1 with a slight elastic tendency. It should be noted that this outward expansion of the elastic screens 5 will not affect the rotation mechanism's ability to drive its rotation; it will only slightly increase the rotational friction between the elastic screens 5 and the inner side of the oil inlet ring 1, which is negligible. Similarly, it will not affect the lifting mechanism's ability to move up and down. The aperture of the oil inlet hole 101 should not be set too small and should be appropriately adjusted according to factors such as the filtration flow rate requirements of the plant essential oil and the aperture of the elastic screens 5.

[0056] In this embodiment, the oil inlet 101 is arranged near the upper edge of the oil inlet ring 1, and the other end of the oil inlet pipe 4 is arranged near the bottom plate. After the plant essential oil enters the essential oil filter tank 3, impurities settle on the bottom plate while the liquid level of the plant essential oil gradually increases, eventually flowing from the oil inlet 101 to the elastic screen 5, which can initially remove large particles of impurities in the plant essential oil.

[0057] In this embodiment, the oil inlet 101 is arranged at an angle, with its higher end connected to the essential oil filter tank 3. Considering that some impurities in the plant essential oil may remain in the oil inlet 101, this embodiment sets the oil inlet 101 at an angle, allowing the impurities to slide towards the elastic screen 5 by their own gravity.

[0058] In this embodiment, a slag discharge pipe 7 connected to the essential oil filter tank 3 is provided on the outside of the housing 2. A valve 8 is provided on the slag discharge pipe 7, which can be opened to discharge the impurities and residual plant essential oil that have settled on the bottom plate.

[0059] In this embodiment, it also includes:

[0060] The bottom of the oil outlet chassis 9 and the oil outlet cylinder 6 are connected to the oil outlet chassis 9. The oil outlet chassis 9 is connected to the oil outlet pipe 10. The oil outlet pipe 10 is connected to the oil inlet pipe 4 of the next stage filtration mechanism.

[0061] In this embodiment, an oil pump 11 is installed on the oil outlet pipe 10. The plant essential oil flows to the elastic screen 5 at a certain flow rate, passes through the elastic screen 5 and flows downward to the oil outlet chassis 9, where it is pumped by the oil pump 11 to the next stage filtration mechanism for filtration.

[0062] In this embodiment, the rotating mechanism includes:

[0063] Turntable 12 is coaxially positioned above elastic screen 5, with the top of elastic screen 5 embedded in the lower surface of turntable 12, and turntable 12 is rotatably connected to lifting mechanism;

[0064] The external gear ring 13 is located on the outer edge of the turntable 12;

[0065] A rotary motor 14 is mounted on the lifting mechanism. A drive gear 15 is provided at the output end of the rotary motor 14. The drive gear 15 meshes with the external gear ring 13.

[0066] The area corresponding to the oil inlet hole 101 of the elastic screen 5 is the normal filtration area, and the area between two adjacent oil inlet holes 101 is the replacement filtration area. The normal filtration area and the replacement filtration area are connected, and the length of the replacement filtration area is greater than the length of the normal filtration area. The rotary motor 14 is used to rotate the replacement filtration area to the position corresponding to the oil inlet hole 101 and to rotate the normal filtration area between two adjacent oil inlet holes 101. The normal filtration area and the replacement filtration area can be set in a certain ratio. For example, the width of the normal filtration area is 1.2 times the diameter of the oil inlet hole 101, and the width of the replacement filtration area is 2.4 times the diameter of the oil inlet hole 101 (that is, two replaceable elastic screen areas are reserved between the two oil inlet holes 101). The distance between two adjacent oil inlet holes 101 on the oil inlet ring 1 corresponds to the replacement filtration area. When the rotary mechanism drives the elastic screen to rotate horizontally by the distance of one normal filtration area, the front half of the replacement filtration area can be moved to the oil inlet hole 101. After rotating once more, the rear half of the replacement filtration area moves to the oil inlet hole 101. If rotated again, the clogged elastic filter will be moved to the oil inlet 101. At this point, it is necessary to adjust the up and down position of the elastic screen 5 or to clean the elastic screen 5.

[0067] In this embodiment, it also includes:

[0068] The bearing 16 has a mounting hole in the middle of the turntable 12, and the bearing 16 is installed in the mounting hole.

[0069] The connecting shaft 17 is located inside the bearing 16, and its top end is connected to the lifting mechanism.

[0070] In this embodiment, the lifting mechanism includes:

[0071] The top of the top plate 18, the top of the rotary motor 14 and the top of the connecting shaft 17 are all located on the lower surface of the top plate 18;

[0072] The lifting cylinder 19 is connected to the top plate 18 and is used to drive the top plate 18 to move up and down along the axis of the oil inlet ring 1.

[0073] The normal filtration zone and the replacement filtration zone together form a ring-shaped filter bar. The elastic screen 5 is composed of multiple filter bars (which can be understood as multiple filter bars stacked on top of each other). When the top plate 18 moves up and down along the axis of the oil inlet ring 1, it can move different filter bars to the horizontal position where the oil inlet hole 101 is located.

[0074] In this embodiment, it also includes:

[0075] The spray mechanism is arranged adjacent to the outer side of the housing 2. When the top plate 18 moves upward, part of the elastic filter screen moves above the oil inlet ring 1, and the spray mechanism is used to spray and clean the elastic filter screen. The spray mechanism can use existing technology and is completely independent of the other structures in this embodiment. It can also be replaced with other cleaning mechanisms suitable for removing impurities from plant essential oils, such as a high-pressure air cleaning mechanism, etc.

[0076] The specific work process is as follows:

[0077] Plant essential oils are fed into the essential oil filter tank 3 through the oil inlet pipe 4. The essential oils contain solid impurities, colloids, waxes, and plant fragments remaining from the pressing or distillation process. Larger and heavier impurities naturally settle to the bottom plate of the essential oil filter tank 3. As the essential oil is continuously fed in, the liquid level in the essential oil filter tank 3 gradually rises. When the liquid level reaches the oil inlet hole 101, the essential oil enters the oil inlet hole 101 and flows towards the elastic screen 5 at a certain flow rate. During the process of the essential oil passing through the elastic screen 5, impurities are trapped by the elastic screen 5. The filtered essential oil flows downwards to the oil outlet cylinder 6, and then through the oil outlet base 9, oil outlet pipe 10, and oil pump 11 to the next stage of filtration, achieving multi-stage filtration of the essential oil.

[0078] When the elastic screen 5 is initially clogged, the drive gear 15 is rotated by the rotary motor 14. The drive gear 15 meshes with the external gear ring 13 and drives the turntable 12 and the elastic screen 5 integrated with the turntable 12 to rotate. Taking clockwise rotation as an example, the normal filtration area, which was originally corresponding to the oil inlet 101, rotates clockwise to the area to the left of the oil inlet 101, while the replacement filtration area, which was originally located to the right of the oil inlet 101, rotates clockwise to the position opposite to the oil inlet 101. If the normal filtration area and the replacement filtration area are arranged as described in the above embodiment, the area corresponding to the oil inlet 101 is the first half of the replacement filtration area. Since the plant essential oil has not yet been filtered in this area, it can be used directly when it rotates to the oil inlet 101. Similarly, when the first half of the replacement filtration area is clogged, the second half of the replacement filtration area can be moved to the position corresponding to the oil inlet 101 to filter the plant essential oil.

[0079] When both the normal filtration zone and all replacement filtration zones are clogged, the rotating elastic filter screen can no longer meet the filtration requirements. In this case, the lifting mechanism can be used to move the elastic filter screen and the rotating mechanism synchronously up and down. At this time, other filter strips located above or below the original filter strips (the normal filtration zone and replacement filtration zone assembly) move to the horizontal position of the oil inlet 101 and can be used as new filter strips. The area corresponding to the oil inlet 101 then becomes the normal filtration zone, and the other areas become the replacement filtration zone. Similarly, when the normal filtration zone of a new filter strip becomes clogged, the above steps can be repeated to change the position of the elastic filter screen. When the lifting mechanism moves the elastic filter screen downwards, some of the elastic filter screen may enter the inner side of the oil outlet cylinder 6. However, this will not affect the downward flow of the filtered plant essential oil. The plant essential oil has a certain flow rate and will continue to flow forward a certain distance after passing through the elastic filter screen, maintaining a certain distance from it. A very small portion of the plant essential oil will come into contact with the clogged elastic filter screen and mix with impurities. Therefore, secondary mixing in this situation can be ignored.

[0080] When the entire elastic filter screen is heavily clogged, changing its position using rotating and lifting mechanisms will not meet filtration requirements, necessitating cleaning. Specifically, the lifting mechanism moves the elastic filter screen upwards, positioning most of it above the oil inlet ring 1, exposing it to air. It's crucial that a portion of the bottom of the elastic filter screen remains within the oil inlet ring 1 to prevent separation. This reserved portion is only for future use and can be omitted from filtering plant essential oils. The elastic filter screen is then cleaned using a spray mechanism. After cleaning, the lifting mechanism resets the elastic filter screen, allowing it to be reused.

[0081] After the plant essential oil filtration process is complete, valve 8 on the slag discharge pipe 7 can be opened to discharge the residual essential oil and impurities. To avoid waste, a filter screen can be installed at the slag discharge pipe 7 to recover any remaining essential oil. To improve the slag discharge efficiency, cleaning fluid can also be introduced into the essential oil filter tank 3 after the residual essential oil is discharged. The cleaning fluid level should always be lower than the oil inlet 101 to ensure all remaining impurities are discharged from the slag discharge pipe 7. Finally, routine maintenance of the equipment is required.

[0082] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0083] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A multi-stage filtration device for herbal plant essential oils, characterized in that, Includes a multi-stage filtration mechanism, the filtration mechanism comprising: The oil inlet ring (1) is a cylindrical structure with openings at the top and bottom. The oil inlet ring (1) has multiple oil inlet holes (101) through its inner and outer surfaces. The multiple oil inlet holes (101) are evenly arranged along the circumference of the oil inlet ring (1). The housing (2) is spaced apart on the outside of the oil inlet ring (1). The bottom of the housing (2) has a bottom plate, which is connected to the outer edge of the bottom of the oil inlet ring (1). The housing (2) and the outer side of the oil inlet ring (1) form an essential oil filter groove (3). The oil inlet pipe (4) is connected to the plant essential oil at one end and to the essential oil filter tank (3) at the other end; The elastic screen (5) is cylindrical and coaxially arranged inside the oil inlet ring (1). The elastic screen (5) has an outward expansion elastic tendency and is closely attached to the inside of the oil inlet ring (1). A rotating mechanism is connected to the elastic screen (5) for driving the elastic screen (5) to rotate along the axis of the oil inlet ring (1); The lifting mechanism is rotatably connected to the elastic screen (5), and the rotating mechanism is mounted on the lifting mechanism; the lifting mechanism is used to drive the elastic screen (5) and the rotating mechanism to move up and down along the axis of the oil inlet ring (1); The oil outlet cylinder (6) is connected to the inner edge of the bottom of the oil inlet ring (1), and the oil outlet cylinder (6) is connected to the oil inlet pipe (4) of the next stage filter mechanism; The rotating mechanism includes: A turntable (12) is coaxially positioned above the elastic screen (5), with the top of the elastic screen (5) embedded in the lower surface of the turntable (12), and the turntable (12) is rotatably connected to the lifting mechanism. An external gear ring (13) is disposed on the outer edge of the turntable (12); A rotary motor (14) is mounted on the lifting mechanism. The output end of the rotary motor (14) is provided with a drive gear (15), which meshes with the external gear ring (13). The area corresponding to the oil inlet hole (101) of the elastic screen (5) is the normal filtration area. The area between two adjacent oil inlets (101) of the elastic screen (5) is the replacement filtration area. The normal filtration area and the replacement filtration area are connected and the length of the replacement filtration area is greater than the length of the normal filtration area. The rotary motor (14) is used to rotate the replacement filtration area to the position corresponding to the oil inlet hole (101) and rotate the normal filtration area between two adjacent oil inlets (101).

2. The multi-stage filtration device for herbal essential oils according to claim 1, characterized in that, The oil inlet hole (101) is arranged near the upper edge of the oil inlet ring (1), and the other end of the oil inlet pipe (4) is arranged near the bottom plate.

3. The multi-stage filtration device for herbal essential oils according to claim 2, characterized in that, The oil inlet (101) is arranged at an angle, with its higher end connected to the essential oil filter tank (3).

4. The multi-stage filtration device for herbal essential oils according to claim 2, characterized in that, The outer side of the housing (2) is provided with a slag discharge pipe (7) that communicates with the essential oil filter tank (3), and a valve (8) is provided on the slag discharge pipe (7).

5. The multi-stage filtration device for herbal essential oils according to claim 1, characterized in that, Also includes: The bottom of the oil outlet chassis (9) is connected to the oil outlet cylinder (6), the oil outlet chassis (9) is connected to the oil outlet pipe (10), and the oil outlet pipe (10) is connected to the oil inlet pipe (4) of the next stage filtration mechanism.

6. The multi-stage filtration device for herbal essential oils according to claim 5, characterized in that, An oil pump (11) is installed on the oil outlet pipe (10).

7. The multi-stage filtration device for herbal essential oils according to claim 1, characterized in that, Also includes: The bearing (16) is provided with a mounting hole in the middle of the turntable (12), and the bearing (16) is disposed in the mounting hole; The connecting shaft (17) is located inside the bearing (16), and its top end is connected to the lifting mechanism.

8. A multi-stage filtration device for herbal essential oils according to claim 7, characterized in that, The lifting mechanism includes: The top of the top plate (18), the top of the rotary motor (14) and the connecting shaft (17) are both located on the lower surface of the top plate (18); The lifting cylinder (19) is connected to the top plate (18) and is used to drive the top plate (18) to move up and down along the axis of the oil inlet ring (1); The normal filtration zone and the replacement filtration zone together form an annular filter bar. The elastic screen (5) is composed of multiple filter bars. When the top plate (18) moves up and down along the axis of the oil inlet ring (1), it can move different filter bars to the horizontal position where the oil inlet hole (101) is located.

9. A multi-stage filtration device for herbal essential oils according to claim 1, characterized in that, Also includes: The spraying mechanism is arranged adjacent to the outer side of the housing (2). When the top plate (18) moves upward, part of the elastic filter moves above the oil inlet ring (1). The spraying mechanism is used to spray and clean the elastic screen (5).

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