Device and method for detecting plant extract

Abstract

The invention discloses a plant extracting solution detection device and method, and belongs to the technical field of plant extraction.The plant extracting solution detection device comprises a workbench, a vertical plate, a mixing barrel and a detector are installed on the top end table top of the workbench, a top cover and a liquid inlet pipe are arranged on the mixing barrel, and a spectrum detection probe is slidably arranged on the vertical plate; a lifting assembly, a lifting seat and a range finder are arranged in the mixing barrel, and a suction end, a connecting hose, a fixing head and an injector are sequentially arranged on the lifting seat. Through cooperative use of the spectrum detection probe, the range finder, the lifting seat and the lifting assembly, a plurality of suction ends can be automatically and accurately positioned to all layers for suction, an extracting solution sequentially passes through the suction ends, a connecting hose and a fixing head to enter an injector so as to facilitate subsequent detection, the structure is automatically operated in the whole process, and the working efficiency is greatly improved. Time and labor are saved, layered suction positioning is accurate, and the detection result of each layer of sucked extracting solution has representativeness.

Description

Technical Field

[0001] The present invention relates to the technical field of plant extraction, and specifically relates to a detection device and a detection method for a plant extract. Background Art

[0002] A plant extract refers to a substance extracted or processed from plants as raw materials using appropriate solvents or methods. Its application fields are very extensive, including the pharmaceutical industry, food industry, daily chemical industry, and many other industries. Due to the strong biological activities of natural plant extracts, such as immunomodulatory, anti-infective, antioxidant-enhancing, anti-inflammatory effects, etc., the exploration of their medicinal values has always attracted the attention of many researchers. Especially for some plants, such as willow bark and echinacea, their extracts have powerful antiviral properties against a variety of viruses, including influenza virus and enterovirus, providing a broad foundation for the development of new antiviral drugs. Currently, in order to make the extracted plant liquid meet medical standards, it is necessary to detect the extracted plant liquid.

[0003] The prior art has the following defects: First, most existing extract detection devices do not have auxiliary functions, and the internal particles of some extracts are prone to serious precipitation, failing to achieve a fully mixed effect; Second, after the plant extract is stored for a long time, precipitation will occur, and the concentration and composition ratio of the plant extract at different heights in the storage tank will change. Therefore, it is necessary to sample the plant extract at different heights in the storage tank, but traditional sampling tools rarely involve sampling at various heights. To overcome the first defect, the prior art (Chinese patent with application number 202310918902.2 and application date November 3, 2023) discloses a detection device and a detection method for a plant extract. By setting a lifting part, the distance between the stirring rod and the mixing cylinder can be adjusted, and the driving motor drives the stirring rod to fully mix the plant extract in the mixing cylinder. At the same time, through the first electric slide rail, the sliding block drives the pressing plate to move vertically upward, so that the syringe sucks the plant extract, solving the first defect mentioned above; To overcome the second defect, the prior art (Chinese patent with application number 202420637765.5 and application date March 29, 2024) discloses a sampling device for plant extract detection. The plant extract is extracted by a water pump, and a long hose can reach different depths in the storage device. After the plant extract is drawn out by the water pump, it flows into each reagent bottle through a shunt pipe to complete the sampling of the plant extract at different height positions, solving the second defect mentioned above; Although the prior art 1 and the prior art 2 can overcome the above defects, when the existing detection device sucks the stratified plant extract, it is necessary to manually position the suction head to the height of each layer, which is not only time-consuming and laborious, but also prone to inaccurate positioning, resulting in unrepresentative detection results of the sucked extract.

[0004] In view of the above problems, it is urgent to carry out innovative design based on the original equipment. Therefore, we have proposed a detection device and method for plant extracts that can well solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a detection device and a detection method for plant extracts, so as to solve the problem raised in the above background technology that the existing detection devices on the market need to manually position the suction head to the height of each layer when sucking layered plant extracts, which is not only time-consuming and labor-intensive, but also prone to inaccurate positioning, resulting in the detection results of the sucked extracts being unrepresentative.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a detection device for plant extract, comprising a workbench, a mixing barrel and a detector are installed on the top table of the workbench, the top of the mixing barrel is covered with a top cover, and a liquid inlet pipe is connected to one side of the mixing barrel, and a loading tray is placed on the table of the detector; the top table of the workbench is connected to a vertical plate, a spectrum detection probe is slidably arranged on the vertical plate, the end of the spectrum detection probe is attached to the outer wall of the mixing barrel, a plurality of lifting seats are arranged at one end of the interior of the mixing barrel through a lifting assembly, and a rangefinder is installed on the inner wall of the mixing barrel above the lifting seat; a suction end is fixedly installed on the inner side of each of the lifting seats, a connecting hose is connected to the top of the suction end, a fixing head is connected to the top of the connecting hose, and the fixing head is fixedly connected to the top of the top cover, a syringe is docked at the top of the fixing head, and a liquid outlet is fixedly arranged at the bottom of the end of the syringe away from the mixing barrel.

[0007] Preferably, a stirring mechanism is provided inside the mixing barrel, and the stirring mechanism is composed of a driving source and a stirring member.

[0008] Preferably, symmetrically distributed slide rails are formed on the inner side of the vertical plate, an electric slide seat is slidably connected to the slide rails, and the spectrum detection probe is fixedly installed on the side wall of the electric slide seat.

[0009] Preferably, the lifting assembly includes a plurality of screw rods rotatably connected to the inner wall of the workbench, each of the lifting seats is threadedly connected to the outer side of the corresponding screw rod, and the top end of the screw rod passes through the outside of the top cover and is fixedly connected to a bevel gear, and a motor is provided on the top of the top cover for movement by a pushing mechanism, and the output shaft of the motor is axially limitedly connected to a main bevel gear through an axis core and a connecting shaft, and the main bevel gear is meshed with one of the bevel gears.

[0010] Preferably, the shaft core is fixedly connected to the output shaft of the motor, the connecting shaft is fixedly connected to the main bevel gear, and the shaft core is slidably sleeved outside the connecting shaft, and the socket section is oval. A spring is fixedly connected between the inner wall of the connecting shaft and the shaft core, and electromagnets and magnetic rings are respectively fixedly connected to the outer walls of the end portions of the shaft core and the connecting shaft close to each other. When the electromagnet is energized, it attracts the magnetic ring.

[0011] Preferably, a first solenoid valve is installed at the bottom suction port of the syringe, and a second solenoid valve is installed at the liquid outlet. When the syringe is sucking, the first solenoid valve is opened and the second solenoid valve is closed. When the syringe needs to be displaced after sucking is completed, both the first solenoid valve and the second solenoid valve are closed. When the syringe moves to a position where the liquid outlet is above the loading tray, the second solenoid valve is opened for discharging.

[0012] Preferably, a plurality of compartments are provided at the top of the loading tray, and each compartment corresponds to the position of each liquid outlet.

[0013] Preferably, a mounting frame is commonly installed outside the syringe. The mounting frame is integrally in a square frame structure, and the syringes and the fixed heads are in one-to-one correspondence and are evenly inserted on the bottom cross bar of the mounting frame. A suction mechanism is installed inside the top end of the mounting frame. The suction mechanism is composed of a cylinder and a pressing plate. The tops of the suction rods of the syringes are commonly fixedly connected to the pressing plate.

[0014] Preferably, convex plates extend from the outer walls on both sides of the mounting frame, and electric telescopic rods are fixedly connected to the bottoms of the convex plates. The bottoms of the two electric telescopic rods are commonly fixedly installed with a bottom frame. One end of the bottom of the detector is fixedly installed with an electric push rod, and the end of the rod body of the electric push rod is fixedly connected to the middle end wall of the bottom frame.

[0015] Preferably, a method for using the detection device is also disclosed. The specific method steps are as follows: S1. First, inject the plant extract into the interior of the mixing barrel through the liquid inlet pipe, let it stand for a period of time to wait for precipitation and stratification, and then start the spectral detection probe to make it fit the outer wall of the mixing barrel for lifting and moving. When the position where the spectral information changes, that is, the stratification position, is detected, the position information here will be collected and transmitted to the control terminal; S2. Then start the rangefinder and the lifting assembly. The lifting assembly drives each lifting seat to move downward in turn, and the suction end head moves downward synchronously. The rangefinder will monitor the position of the moving lifting seat in real time. When the first lifting seat moves downward to be close to the first stratification position detected by the spectral detection probe, the control terminal controls this lifting seat to stop here. The lifting assembly continues to drive the next lifting seat to move downward. When this lifting seat moves to the second stratification position, it also stops. This process is repeated continuously until a suction end head touches the inner wall of the bottom of the mixing barrel, that is, the suction end heads are accurately positioned at each stratification position; S3. Then drive the syringe to suck through the suction structure, so that the extracts at each stratification position pass through the suction end head, the connecting hose, and the fixed head and enter the corresponding syringe in turn; S4. Finally, drive all the syringes to move to the detector through the electric telescopic rod, and discharge the extract to the loading tray through the liquid outlet for subsequent detection and analysis.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: For this detection device for plant extracts, through the combined use of the spectral detection probe, the rangefinder, the lifting seat and the lifting assembly, multiple suction end heads can be automatically and accurately positioned at each stratification position for suction, so that the extract enters the corresponding syringe for subsequent detection. This structure is fully automated, time-saving and labor-saving, and the stratification suction positioning is accurate, making the detection results of the extracts from each layer sucked have representativeness. The specific content is as follows: 1. Through the combined use of the spectral detection probe, the rangefinder, the lifting seat and the lifting assembly, multiple suction end heads can be automatically and accurately positioned at each stratification position for suction. The sucked extract passes through the suction end head, the connecting hose and the fixed head and enters the syringe in turn for subsequent detection. This structure is fully automated, time-saving and labor-saving, and the stratification suction positioning is accurate, making the detection results of the extracts from each layer sucked have representativeness; 2. By driving the shaft core, the connecting shaft and the main bevel gear to rotate synchronously in turn by the motor, the main bevel gear continues to drive the engaged sub-bevel gear to rotate. The lead screw at the bottom of the sub-bevel gear rotates synchronously, and the lifting seat outside the lead screw will move up and down. And the motor is driven to move through the pushing mechanism, so that the main bevel gear can be engaged and driven with different sub-bevel gears in turn, saving power consumption; 3. When it is necessary to move the main bevel gear to mesh with the next sub-bevel gear, the control terminal will automatically energize the electromagnet, causing it to attract and approach the magnetic ring. The connecting shaft and the main bevel gear move synchronously, and the spring is compressed. At this time, the pushing mechanism starts to drive the motor to move to the next sub-bevel gear. Then the electromagnet automatically de-energizes, causing the magnetic attraction to disappear. Under the action of the spring's rebound, the connecting shaft and the main bevel gear move outward to reset, and the main bevel gear will mesh with the sub-bevel gear at this position. 4. After the syringe aspiration is completed, the electric telescopic rod extends upward, driving the mounting bracket and all syringes to move upward, causing the mounting bracket to disengage from the fixed head. At this time, the rod body of the electric push rod shortens, driving the bottom frame, the electric telescopic rod, the mounting bracket and all syringes to move closer to the detector as a whole, so that each liquid outlet can be aligned with each compartment of the loading tray on the detector for discharging. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the front view structural schematic diagram of the present invention; Figure 2 is the side view structural schematic diagram of the present invention; Figure 3 is the internal sectional structural schematic diagram of the mixing barrel of the present invention; Figure 4 is the partial sectional structural schematic diagram of the present invention; Figure 5 is the present invention Figure 4 the enlarged structural schematic diagram at A in; Figure 6 is the connection structural schematic diagram of the shaft core and the connecting shaft of the present invention; Figure 7 is the exploded structural schematic diagram of the syringe and the connecting hose of the present invention; Figure 8 is the example schematic diagram when the syringe discharges liquid of the present invention.

[0018] In the figure: 1, workbench; 2, mixing barrel; 3, top cover; 4, liquid inlet pipe; 5, detector; 6, loading tray; 7, stirring mechanism; 8, vertical plate; 9, slide rail; 10, electric slide; 11, spectral detection probe; 12, rangefinder; 13, lead screw; 14, lifting seat; 15, suction end; 16, connecting hose; 17, fixed head; 18, syringe; 19, liquid outlet; 20, first solenoid valve; 21, second solenoid valve; 22, mounting bracket; 23, suction mechanism; 24, electric push rod; 25, bottom frame; 26, electric telescopic rod; 27, sub-bevel gear; 28, motor; 29, pushing mechanism; 30, shaft core; 31, connecting shaft; 32, main bevel gear; 33, spring; 34, electromagnet; 35, magnetic ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figures 1 - 5 As shown, when the existing detection device sucks the layered plant extract, it is necessary to manually position the suction head to the height of each layer, which is not only time-consuming and labor-intensive, but also prone to inaccurate positioning, resulting in the detection result of the sucked extract being unrepresentative. In order to solve this technical problem, the present embodiment discloses the following technical content: it includes a workbench 1, and the top table of the workbench 1 is fixedly installed with a mixing barrel 2 and a detector 5, the top of the mixing barrel 2 is covered with a top cover 3, and one side of the mixing barrel 2 is fixedly connected with a liquid inlet pipe 4, and the inner side of the mixing barrel 2 is provided with a stirring mechanism 7, which is composed of a driving source and a stirring member, and can fully stir the injected plant extract, thereby making the layered sedimentation faster and the detection result more accurate, and a loading tray 6 is placed on the table of the detector 5.

[0021] The top table of the workbench 1 is located on one side of the workbench 1 and is fixedly connected to a vertical plate 8. A spectrum detection probe 11 is vertically slidably arranged on the vertical plate 8. The end of the spectrum detection probe 11 is fitted to the outer wall of the mixing barrel 2 for movement. Specifically, a symmetrically distributed slide rail 9 is formed on the inner side of the vertical plate 8. An electric slide seat 10 is slidably connected to the slide rail 9. The spectrum detection probe 11 is fixedly installed on the side wall of the electric slide seat 10. The movement of the spectrum detection probe 11 for spectrum analysis and detection is realized by the cooperation of the slide rail 9 and the electric slide seat 10. A plurality of lifting seats are arranged at one end of the interior of the mixing barrel 2 through a lifting assembly. 14, a rangefinder 12 is fixedly installed on the inner wall of the mixing barrel 2 above the lifting seat 14 to measure the spacing of each lifting seat 14; a suction end 15 is fixedly installed on the inner side of each lifting seat 14, and a connecting hose 16 is fixedly connected to the top of the suction end 15. The top of the connecting hose 16 slides through the top cover 3 to the outside of the mixing barrel 2 and is fixedly connected to a fixed head 17, and the fixed head 17 is fixedly connected to the top of the top cover 3, and a syringe 18 is docked at the top of the fixed head 17, and a liquid outlet 19 is fixedly provided at the bottom of the end of the syringe 18 away from the mixing barrel 2.

[0022] By adopting the above technical solution, first, the plant extract is injected into the interior of the mixing barrel 2 through the liquid inlet pipe 4, and left standing for a period of time to wait for precipitation and stratification. Then, the spectral detection probe 11 is started to move up and down while being attached to the outer wall of the mixing barrel 2. When the position where the spectral information changes (i.e., the stratification position) is detected, the position information here will be collected and transmitted to the control terminal. After the spectral detection probe 11 finishes scanning, it automatically returns to its original position. Then, the rangefinder 12 and the lifting assembly are started. The lifting assembly will drive each lifting seat 14 to move downward in sequence from left to right. During the downward movement of the lifting seat 14, the suction end 15 will be driven to move synchronously, and the connecting hose 16 will be driven downward accordingly. And the rangefinder 12 will monitor the position of the moving lifting seat 14 in real time. When the first lifting seat 14 moves down to a position where the distance data between it and the rangefinder 12 is close to the first stratification position detected by the spectral detection probe 11, the control terminal will make this lifting seat 14 stop at this position. The lifting assembly continues to drive the next lifting seat 14 to move down. When this lifting seat 14 moves to the second stratification position, it also stops. This process is repeated continuously until a suction end 15 touches the inner wall of the bottom of the mixing barrel 2. In this way, each suction end 15 will stay at each stratification position. At this time, the syringe 18 can be used for suction, so that the extract at each stratification position passes through the suction end 15, the connecting hose 16, and the fixed head 17 in sequence and enters the interior of the corresponding syringe 18. Finally, all the syringes 18 are moved to the detector 5, and the extract inside is discharged to the loading tray 6 through the liquid outlet 19 for subsequent detection and analysis. This structure is fully automated throughout the process, saving time and effort, and the stratification suction positioning is accurate, making the detection results of the extracted liquid in each layer representative.

[0023] Embodiment 2: The technical content disclosed in this embodiment is a further improvement based on the above Embodiment 1, such as Figure 2 、 Figures 4 - 8As shown in the figure, this embodiment discloses the following technical content: The above-mentioned lifting assembly includes several lead screws 13 rotatably connected to the inner wall of the workbench 1. Each lifting seat 14 is threadedly connected to the outside of the corresponding lead screw 13. The top end of the lead screw 13 penetrates to the outside of the top cover 3 and is fixedly connected to a bevel gear 27. A motor 28 is movably arranged on the top of the top cover 3 through a pushing mechanism 29. The output shaft of the motor 28 is axially limited and connected to a main bevel gear 32 through a shaft core 30 and a connecting shaft 31. The main bevel gear 32 meshes with one of the bevel gears 27. By sequentially driving the shaft core 30, the connecting shaft 31, and the main bevel gear 32 to rotate synchronously by the motor 28, the main bevel gear 32 continues to drive the engaged bevel gear 27 to rotate. The lead screw 13 at the bottom of the bevel gear 27 rotates synchronously, and the lifting seat 14 on the outside of the lead screw 13 will move up and down. And by driving the motor 28 to move through the pushing mechanism 29 and the main bevel gear 32 to move synchronously, the main bevel gear 32 can be meshed and driven with different bevel gears 27 in sequence, thereby achieving the effect of sequentially driving and rotating each lead screw 13, and also saving power consumption.

[0024] The shaft core 30 is fixedly connected to the output shaft of the motor 28, the connecting shaft 31 is fixedly connected to the main bevel gear 32, and the shaft core 30 is slidably sleeved on the outside of the connecting shaft 31, and the sleeve section is elliptical to achieve the axial limit of the two. A spring 33 is fixedly connected between the inner wall of the connecting shaft 31 and the shaft core 30. The outer walls of the end portions of the shaft core 30 and the connecting shaft 31 close to each other are respectively fixedly connected with an electromagnet 34 and a magnetic ring 35. When the electromagnet 34 is energized, it attracts the magnetic ring 35. In use, when it is necessary to move the main bevel gear 32 to mesh with the next bevel gear 27, the control terminal will automatically energize the electromagnet 34 to make it attracted and close to the magnetic ring 35. The connecting shaft 31 and the main bevel gear 32 move synchronously, and the spring 33 is compressed. At this time, after the pushing mechanism 29 is started to drive the motor 28 to move to the next bevel gear 27, the electromagnet 34 is automatically powered off to make the magnetic attraction disappear. Under the action of the spring 33 rebounding, the connecting shaft 31 and the main bevel gear 32 move outwards and reset, and the main bevel gear 32 will mesh with the bevel gear 27 here.

[0025] In addition, a mounting frame 22 is commonly installed on the outer side of the syringe 18. The mounting frame 22 is integrally in a square frame structure, and the syringes 18 and the fixing heads 17 are in one-to-one correspondence and are evenly inserted into the bottom cross bar of the mounting frame 22 to prevent the extraction liquid from overflowing from the docking part of the fixing head 17 and the syringe 18. A suction mechanism 23 is installed on the inner side of the top end of the mounting frame 22. The suction mechanism 23 is composed of a cylinder and a pressing plate. The top of the suction rod of the syringe 18 is commonly fixedly connected to the pressing plate. All the syringes 18 can be suctioned together through the suction mechanism 23. Moreover, convex plates extend from the outer walls on both sides of the mounting frame 22, and an electric telescopic rod 26 is fixedly connected to the bottom of the convex plate. The bottom ends of the two electric telescopic rods 26 are commonly fixedly installed with a bottom frame 25. One end of the bottom of the detector 5 is fixedly installed with an electric push rod 24, and the end of the rod body of the electric push rod 24 is fixedly connected to the middle end wall of the bottom frame 25. After the syringe 18 finishes suctioning, the electric telescopic rod 26 elongates upward to drive the mounting frame 22 and all the syringes 18 to move upward, so that the mounting frame 22 is disengaged from the insertion with the fixing head 17. At this time, the rod body of the electric push rod 24 shortens, and the bottom frame 25 drives the electric telescopic rod 26, the mounting frame 22 and all the syringes 18 to move as a whole closer to the detector 5, so that the liquid outlet 19 can be aligned with the loading tray 6 on the detector 5 for discharging. Among them, a plurality of compartments are arranged on the top of the loading tray 6, and each compartment corresponds to the position of each liquid outlet 19 to achieve accurate separated material receiving. At the same time, a first electromagnetic valve 20 is installed at the bottom suction port of the syringe 18, and a second electromagnetic valve 21 is installed on the liquid outlet 19. When the syringe 18 is sucking, the first electromagnetic valve 20 is opened and the second electromagnetic valve 21 is closed. When the syringe 18 needs to be displaced after sucking is completed, both the first electromagnetic valve 20 and the second electromagnetic valve 21 are closed. When the syringe 18 moves to a position where the liquid outlet 19 is above the loading tray 6, the second electromagnetic valve 21 is opened for discharging, so as to avoid waste of samples caused by the overflow of the extraction liquid inside the syringe 18 during this process.

[0026] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A plant extract detection device, comprising a workbench (1), a mixing barrel (2) and a detector (5) being mounted on the top surface of the workbench (1), a top cover (3) being provided on the top of the mixing barrel (2), and a liquid inlet pipe (4) being connected to one side of the mixing barrel (2), and a loading tray (6) being placed on the surface of the detector (5); It is characterized in that The top surface of the workbench (1) is connected to a vertical plate (8), a spectrum detection probe (11) is slidably arranged on the vertical plate (8), the end of the spectrum detection probe (11) is attached to the outer wall of the mixing barrel (2), a plurality of lifting seats (14) are arranged at one end of the interior of the mixing barrel (2) via a lifting assembly, and a rangefinder (12) is installed on the inner wall of the mixing barrel (2) above the lifting seats (14); A suction end (15) is fixedly mounted on the inner side of each lifting seat (14); the top end of the suction end (15) is connected to a connecting hose (16); the top of the connecting hose (16) is connected to a fixing head (17); the fixing head (17) is fixedly connected to the top end of the top cover (3); a syringe (18) is docked at the top end of the fixing head (17); and a liquid outlet (19) is fixedly disposed at the bottom end of the syringe (18) away from the mixing barrel (2).

2. A plant extract detection device according to claim 1, characterized in that: A stirring mechanism (7) is arranged inside the mixing barrel (2), and the stirring mechanism (7) is composed of a driving source and a stirring member.

3. A plant extract detection device according to claim 1, characterized in that: The inner side of the vertical plate (8) is formed with symmetrically distributed slide rails (9), an electric slide seat (10) is slidably connected to the slide rails (9), and the spectrum detection probe (11) is fixedly mounted on the side wall of the electric slide seat (10).

4. A plant extract detection device according to claim 1, characterized in that: The lifting assembly comprises a plurality of screw rods (13) rotatably connected to the inner wall of the workbench (1), each of the lifting seats (14) is threadedly connected to the outer side of the corresponding screw rod (13), and the top end of the screw rod (13) penetrates the outside of the top cover (3) and is fixedly connected to a sub-bevel gear (27), and a motor (28) is arranged on the top of the top cover (3) for movement via a push mechanism (29), and the output shaft of the motor (28) is axially limitedly connected to a main bevel gear (32) via a shaft core (30) and a connecting shaft (31), and the main bevel gear (32) is meshed with one of the sub-bevel gears (27).

5. A plant extract detection device according to claim 4, characterized in that: The shaft core (30) is fixedly connected to the output shaft of the motor (28), the connecting shaft (31) is fixedly connected to the main bevel gear (32), and the shaft core (30) is slidably sleeved on the outside of the connecting shaft (31), and the sleeved cross-section is elliptical, a spring (33) is fixedly connected between the inner wall of the connecting shaft (31) and the shaft core (30), and the outer walls of the ends of the shaft core (30) and the connecting shaft (31) that are close to each other are respectively fixedly connected with an electromagnet (34) and a magnetic ring (35), and when the electromagnet (34) is energized, it attracts the magnetic ring (35).

6. A plant extract detection device according to claim 5, characterized in that: A first electromagnetic valve (20) is installed at the bottom suction port of the syringe (18), and a second electromagnetic valve (21) is installed on the liquid outlet (19).

7. A plant extract detection device according to claim 6, characterized in that: A plurality of compartments are arranged on the top of the loading tray (6), and each compartment corresponds to the position of each liquid outlet (19).

8. A plant extract detection device according to claim 6, characterized in that: A mounting frame (22) is installed on the outside of the syringe (18), and the mounting frame (22) is in a square frame structure as a whole. The syringe (18) and the fixed head (17) are corresponding to each other and are evenly inserted into the bottom cross bar of the mounting frame (22). A suction mechanism (23) is installed on the inner side of the top of the mounting frame (22), and the suction mechanism (23) is composed of a cylinder and a pressing plate. The top of the suction rod of the syringe (18) is fixedly connected to the pressing plate.

9. A plant extract detection device according to claim 8, characterized in that: The outer walls of both sides of the mounting frame (22) extend outwardly with convex plates, and the bottom of the convex plates is fixedly connected to an electric telescopic rod (26), the bottom ends of the two electric telescopic rods (26) are fixedly mounted to a base frame (25), and an electric push rod (24) is fixedly mounted to one end of the bottom of the detector (5), and the end of the rod body of the electric push rod (24) is fixedly connected to the middle end wall of the base frame (25).

10. A method for detecting a plant extract, characterized in that: The specific steps are as follows: S1. First, the plant extract is injected into the interior of the mixing barrel (2) through the liquid inlet pipe (4), and allowed to stand for a period of time to settle and stratify, and then the spectrum detection probe (11) is activated to make it fit the outer wall of the mixing barrel (2) and move up and down. When the position where the spectrum information changes (i.e. the stratification position) is detected, the position information at this location is collected and transmitted to the control terminal; S2, then start the rangefinder (12) and the lifting assembly, the lifting assembly drives each lifting seat (14) to move downward in turn, and the suction end (15) moves downward synchronously, the rangefinder (12) monitors the position of the moving lifting seat (14) in real time, when the first lifting seat (14) moves down to the first layer detected by the spectrum detection probe (11), the control terminal controls the lifting seat (14) to stop at this location, the lifting assembly continues to drive the next lifting seat (14) to move downward, and the lifting seat (14) also stops when it moves to the second layer, and this process is repeated continuously until the suction end (15) contacts the inner wall of the bottom end of the mixing barrel (2), that is, the suction end (15) is accurately positioned at each layer; S3, the syringe (18) is then driven by the suction structure to perform suction, so that the extract at each layer passes through the suction end (15), the connecting hose (16), and the fixed head (17) in sequence and enters the interior of the corresponding syringe (18); S4. Finally, the electric telescopic rod (26) drives all the syringes (18) to move to the detector (5), and the extraction liquid is discharged to the loading plate (6) through the liquid outlet (19) for subsequent detection and analysis.

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