A device for identifying fire glory root and its adulterants

Abstract

The application belongs to the technical field of medicinal plants and traditional Chinese medicine identification, and discloses a device for identifying firecracker flower roots and their adulterants, which comprises a liquid nitrogen ball mill, a DNA extraction kit and a PCR amplifier connected in sequence, the liquid nitrogen ball mill is connected with a variable speed motor, and further comprises a sealing assembly, the sealing assembly comprises a first permanent magnet and a sealing ball, the first permanent magnet and the sealing ball repel each other, the first permanent magnet is slidingly arranged in a first through groove, the sealing ball is slidingly arranged in a wedge-shaped through groove, and is connected with a tension spring, the free end of the tension spring is fixedly connected with the wedge-shaped through groove; the first through groove and the wedge-shaped through groove are both provided with a sliding groove, and the first permanent magnet and the sealing ball are slidingly connected with the sliding grooves respectively; the diameter of the sealing ball is not less than the diameter of the opening of the wedge-shaped through groove; the scheme can adjust the supplement amount of liquid nitrogen according to the change of the rotating speed of the ball mill. The application solves the problem that the existing liquid nitrogen ball mill cannot adjust the supplement amount of liquid nitrogen according to the rotating speed of the ball mill.

Description

Technical Field

[0001] This solution belongs to the field of medicinal plant and traditional Chinese medicine identification technology, specifically involving a device for identifying the root of Torchflower and its adulterants. Background Technology

[0002] Referring to the existing public (announcement) background technology with CN113862390A, Torchflower root and Tripterygium wilfordii both belong to the Tripterygium genus of Celastraceae. Some suppliers in the market often use Torchflower root medicinal materials and Tripterygium wilfordii and other medicinal materials interchangeably, and the medicinal parts are all roots. Due to the extremely similar appearance and the limited knowledge of the appraisers, Torchflower root is difficult to distinguish from Tripterygium wilfordii, Tripterygium moniliforme, Celastrus orbiculatus, etc., which seriously affects market chaos and the accuracy and safety of medication.

[0003] Therefore, a primer and method for identifying *Torchella oleracea* root and its adulterants, published under announcement number CN113862390A, is described. The method for extracting genomic DNA from *Torchella oleracea* root and its adulterants involves: wiping the surface of *Torchella oleracea* root and adulterants separately with 75% ethanol, then pulverizing them into fine particles. 60 mg of each sample is taken, and liquid nitrogen is added to each sample. The samples are then ground separately using an automated rapid ball mill for 5 minutes at 30 times / s to obtain separate samples. Using an optimized plant DNA extraction kit, total DNA is extracted from the samples according to the kit instructions, yielding the extracted DNA templates for each sample. Therefore, extracting the genome from *Torchella oleracea* root and its adulterants requires grinding the *Torchella oleracea* root slices and adulterants using a liquid nitrogen ball mill.

[0004] See the existing public announcement (CN109351444A) of a cryogenic liquid nitrogen ball mill, which includes a frame, a cryogenic adapter and a grinding jar. The frame is provided with a support base and a drive component for driving the grinding jar to rotate. The grinding jar is disposed on the support base. One end of the cryogenic adapter is detachably connected to the grinding jar, and the other end is connected to a cryogenic liquid nitrogen tank.

[0005] The aforementioned ball mill connects a cryogenic liquid nitrogen tank to the grinding jar via a cryogenic adapter, enabling intermittent or continuous supply of liquid nitrogen to maintain a cryogenic environment within the grinding jar. This allows the grinding jar to pulverize or grind materials that have become brittle after freezing. While the ball mill can supply liquid nitrogen intermittently or continuously, during grinding, the high-speed operation generates significant heat due to the constant collisions and friction between the grinding balls, the material, and the jar walls, leading to a temperature increase. Although liquid nitrogen can maintain an initial cryogenic environment, continuous friction and collisions will still cause the temperature inside the jar to gradually rise, especially at higher rotational speeds where the rate of heat generation is faster. Excessive temperature can cause the hydrogen bonds in materials, such as DNA molecules in medicinal materials, to break, resulting in the unwinding of the double helix structure and reducing DNA integrity, thus affecting the accuracy of subsequent genomic analysis and identification results. Therefore, liquid nitrogen replenishment and ball mill rotation speed interact with the temperature inside the grinding jar. Higher rotational speeds result in more frequent collisions and friction between the grinding balls, the material, and the jar walls, leading to a temperature increase; while liquid nitrogen replenishment is to maintain the cryogenic environment within the grinding jar. Therefore, the amount of liquid nitrogen replenishment needs to be adjusted according to the change in rotation speed to ensure that the temperature inside the grinding jar is kept within a suitable range, thereby avoiding excessive temperature that could cause the hydrogen bonds of DNA molecules in the medicinal materials to break, and ensuring the accuracy of subsequent genomic analysis and identification results. Summary of the Invention

[0006] The purpose of this solution is to provide a device for identifying Torchflower Roots and its adulterants, in order to solve the problem that existing liquid nitrogen ball mills cannot adjust the amount of liquid nitrogen replenishment according to the ball milling speed.

[0007] To achieve the above objectives, this solution provides a device for identifying Torchflower Root and its adulterants, comprising a liquid nitrogen ball mill, a DNA extraction kit, and a PCR amplification instrument connected in sequence. The liquid nitrogen ball mill is connected to a variable speed motor. The feed inlet of the liquid nitrogen ball mill has a first through-slot connected to the feed inlet. The bearing seat of the liquid nitrogen ball mill has a wedge-shaped through-slot connected to the first through-slot. The wedge-shaped through-slot is connected to a liquid nitrogen tank via a pipe. The device also includes a sealing assembly, which comprises a first permanent magnet and a sealing ball. The first permanent magnet and the sealing ball are magnetically repelled. The first permanent magnet is slidably disposed in the first through-slot, and the sealing ball is slidably disposed in the wedge-shaped through-slot and connected to a tension spring. The free end of the tension spring is fixedly disposed in the pipe connected to the wedge-shaped through-slot.

[0008] The principle of this scheme is as follows: (1) All identification steps except for ball mill grinding are existing technologies and will not be elaborated here. When the material is put into the ball mill jar, the ball mill jar is driven to rotate by the variable speed motor. The first permanent magnet moves in the first through groove under the action of centrifugal force generated by the rotation of the ball mill jar, so that the distance between the first permanent magnet and the sealing ball becomes smaller. And because the first permanent magnet and the sealing ball repel each other magnetically, the sealing ball moves away from the opening of the wedge-shaped through groove. The liquid nitrogen in the liquid nitrogen tank flows to the wedge-shaped through groove through the pipe, and flows through the first through groove and finally flows into the ball mill jar to mix with the medicinal materials. (2) When the speed of the ball mill rises to the critical speed, the first permanent magnet slides to the limit position of the first through groove under the action of a large centrifugal force. At this time, the distance between the first permanent magnet and the sealing ball is the closest, and the repulsion between the two is the greatest, so that the sealing ball slides to the limit position in the wedge-shaped through groove, thereby maximizing the opening of the wedge-shaped through groove and maximizing the amount of liquid nitrogen flowing into the ball mill jar. (3) When the ball mill speed decreases from the critical speed, the first permanent magnet is subjected to a smaller centrifugal force. When it rotates to the upper semicircular trajectory, it does not move to the limit position of the first through groove due to its own gravity. At this time, the distance between the first permanent magnet and the sealing ball increases, and the repulsive force between the two decreases. This causes the sealing ball to move closer to the opening of the wedge-shaped through groove under the action of the tension spring, thereby reducing the opening of the wedge-shaped through groove and reducing the amount of liquid nitrogen flowing into the ball mill jar.

[0009] The advantages of this solution are: (1) Since liquid nitrogen is a liquid, the existing liquid nitrogen ball mill (see CN109351444A) is always at a constant speed after liquid nitrogen is added, which will cause the liquid to be subjected to constant centrifugal force, resulting in liquid nitrogen adhering to the inner wall of the ball mill and affecting its mixing effect with the material. In this solution, since the speed changes, the liquid nitrogen will generate disturbance in the ball mill under the action of constantly changing centrifugal force. This disturbance will promote the liquid nitrogen to mix more fully with the material, thereby increasing the contact area and mixing effect between liquid nitrogen and material, ensuring the uniform distribution of temperature in the grinding jar, and avoiding local overheating. (2) Since this solution requires the speed to change periodically, that is, to alternate between fast and slow, the temperature of the grinding jar will be higher when the speed is faster and lower when the speed is slower. Therefore, it is necessary to adjust the amount of liquid nitrogen replenishment according to the change of speed so that the temperature of the medicinal material is consistent during grinding. When the rotation speed increases, the sealing ball slides to its limit position in the wedge-shaped groove, thereby maximizing the opening of the wedge-shaped groove and maximizing the amount of liquid nitrogen flowing into the ball mill jar. This avoids the temperature rise caused by the rotation speed, which would denature the DNA molecules in the medicinal material and ensure the integrity of DNA extraction. When the rotation speed is low, the sealing ball is closer to the opening of the wedge-shaped groove, which reduces the opening of the wedge-shaped groove and reduces the amount of liquid nitrogen flowing into the ball mill jar, ensuring that the temperature of the medicinal material is consistent at both high and low rotation speeds. (3) This scheme adjusts the replenishment of liquid nitrogen by changing the rotation speed. Compared with existing liquid nitrogen ball mills, it can maintain the temperature inside the ball mill jar without stopping the machine, avoiding operation interruption and temperature fluctuation caused by stopping the machine to replenish liquid nitrogen.

[0010] Furthermore, both the first through groove and the wedge-shaped through groove are provided with sliding grooves, and the first permanent magnet and the sealing ball are slidably connected to the sliding grooves respectively.

[0011] The principle and effect of this scheme are as follows: the sliding grooves provide positioning and guidance for the sealing ball and the first permanent magnet to move within the first through groove and the wedge-shaped through groove under the action of centrifugal force.

[0012] Furthermore, the diameter of the sealing ball is not less than the diameter of the wedge-shaped through groove opening.

[0013] The principle and effect of this solution is that the sealing ball can completely block the opening of the wedge-shaped groove under the action of centrifugal force, thereby sealing the wedge-shaped groove.

[0014] Furthermore, the width of the first permanent magnet is smaller than the inner diameter of the first through slot.

[0015] The principle and effect of this scheme are as follows: there is a gap between the first permanent magnet and the first through groove. After the sealing ball moves away from the wedge-shaped through groove, liquid nitrogen can flow into the feed port through the gap and into the grinding jar.

[0016] Furthermore, the first through groove is an annular through groove, and the first permanent magnet consists of two symmetrically arranged semi-circular permanent magnets, with the end faces of the two first permanent magnets touching each other.

[0017] The principle and effect of this solution is that when the mill jar rotates, the first permanent magnet is always engaged with the sealing ball.

[0018] Furthermore, the ball mill's grinding jar is provided with an inner cylinder and an outer cylinder, the inner cylinder and the outer cylinder being coaxially connected, and a cavity being provided between the inner cylinder and the outer cylinder. The inner cylinder has a second through groove. It also includes a screening assembly, which includes a baffle and a sieve plate. One end of the baffle and the sieve plate are fixedly connected, and the baffle and the sieve plate are slidably disposed in the second through groove. The other end of the sieve plate is connected to a spring, the free end of the spring being fixedly connected to the inner cylinder. The sieve plate is connected to a second permanent magnet, and an electromagnet is provided inside the inner cylinder. The electromagnet is used to attract the second permanent magnet when energized.

[0019] The principle and effect of this solution are as follows: (1) Referring to the background technology of CN116351519A, after grinding the material, it is necessary to pour out the ground powder. In the process of pouring out the powder, the traditional method is to pour out the powder and the grinding beads together, and then use a sieve to separate the powder and the grinding beads. This increases the number of operation steps and greatly reduces the efficiency of material grinding. (2) In this solution, after the medicinal material is ground into fine powder, the electromagnet is energized to make its coil attract the second permanent magnet, thereby causing the sieve plate to move the baffle towards the electromagnet and compress the spring. Then the electromagnet is de-energized, and the sieve plate and the baffle are reset under the action of the spring and the sieve plate rotates back and forth in the second through groove. The baffle is rotated away from the cavity and the sieve plate rotates back and forth in the cavity, thereby separating the medicinal material powder into the cavity and realizing the separation of the medicinal material powder from the grinding beads. (3) By setting up a cavity between the inner and outer cylinders and a sieve plate with a second permanent magnet, this scheme can directly separate the medicinal powder from the grinding beads in the ball mill after grinding, thereby simplifying the operation steps, avoiding the additional sieving process required in the traditional method, and improving the grinding efficiency.

[0020] Furthermore, the outer cylinder is provided with a discharge port, which is connected to the cavity, and the discharge port is provided with a baffle plate.

[0021] The principle and effect of this solution is that when material needs to be discharged, the powdered medicinal materials in the cavity are discharged to the outside of the ball mill by opening the baffle plate.

[0022] Furthermore, the inner cylinder is provided with a guide groove, and both the baffle and the sieve plate are slidably connected to the guide groove.

[0023] The principle and effect of this scheme are as follows: the guide groove provides guidance for the movement of the baffle and sieve plate in the second through groove.

[0024] Furthermore, the baffle and sieve plate have the same radius of curvature as the inner cylinder.

[0025] The principle and effect of this solution are: to reduce the friction between the baffle and sieve plate and the second channel, and to increase the frequency of the baffle and sieve plate rotating back and forth in the second channel.

[0026] Furthermore, the screening assembly also includes a driving unit, which includes a touch switch and a reset spring. The reset spring is fixedly connected to the first through slot, and the free end of the reset spring is fixedly connected to the first permanent magnet. The touch switch is disposed in the first through slot, and the first permanent magnet is used to abut the touch switch. The touch switch is electrically connected to an electromagnet.

[0027] The principle and effect of this scheme are as follows: (1) When the ball mill jar rotates, the first permanent magnet is moved away from the touch switch by centrifugal force and stretches the reset spring. At this time, the electromagnet is in a de-energized state. When the ball mill jar stops rotating, the first permanent magnet loses the centrifugal force and resets to the initial position under the drive of the reset spring, thereby touching the touch switch and giving the electromagnet an electric pulse signal, so that the electromagnet is energized and de-energized, thereby attracting the screen plate and baffle and screening the material under the drive of the spring after the power is de-energized. (2) This scheme controls the electromagnet to be energized and de-energized by the change of rotation speed because the existing technology will cause the material to stay in the ball mill jar for a longer time after the power is de-energized, which will easily lead to the material denaturation. This scheme controls the electromagnet to be energized and de-energized by the change of rotation speed of the ball mill jar. When the ball mill jar stops rotating, the first permanent magnet resets and triggers the touch switch, so that the electromagnet is energized and attracts the screen plate and baffle, thereby realizing the automatic screening and discharge of the material. Attached Figure Description

[0028] Figure 1 This is a partial structural schematic diagram of the liquid nitrogen ball mill of the present invention;

[0029] Figure 2 This is a schematic diagram of the sealing assembly of the present invention. Figure 1 ;

[0030] Figure 3 This is a schematic diagram of the sealing assembly of the present invention. Figure 2 ;

[0031] Figure 4 This is a schematic diagram of the sealing assembly of the present invention. Figure 3 ;

[0032] Figure 5 This is a schematic diagram of the structure of the screening component of the present invention.

[0033] The reference numerals in the accompanying drawings include: liquid nitrogen ball mill 1, feed inlet 11, first through groove 111, bearing seat 12, wedge-shaped through groove 121, ball mill jar 13, inner cylinder 131, outer cylinder 132, cavity 133, sealing assembly 2, first permanent magnet 21, sealing ball 22, tension spring 23, screening assembly 3, baffle 31, sieve plate 32, spring 33, second permanent magnet 34, electromagnet 35, drive unit 36, touch switch 361, and reset spring 362. Detailed Implementation

[0034] The following will describe the concept and technical effects of the present invention clearly and completely with reference to embodiments, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention.

[0035] Example:

[0036] Please see Figure 1 A device for identifying Torch Flower Roots and its adulterants includes a liquid nitrogen ball mill 1, a DNA extraction kit, and a PCR amplification instrument connected in sequence. The liquid nitrogen ball mill 1 is connected to a variable speed motor. All the above-mentioned equipment not shown in the figure is prior art. The variable speed motor is a PID servo motor and is electrically connected to a PID controller.

[0037] Please see Figures 2-4The feed inlet 11 of the liquid nitrogen ball mill 1 is provided with an annular first channel 111. The first channel 111 is connected to the feed inlet 11, so that liquid nitrogen passing through the feed inlet 11 can flow into the first channel 111 and into the ball mill jar 13. The top of the bearing seat 12 of the liquid nitrogen ball mill 1 is provided with a wedge-shaped channel 121. The wedge-shaped channel 121 is connected to the first channel 111. The wedge-shaped channel 121 is connected to the liquid nitrogen tank (not shown in the figure) through a pipe. Liquid nitrogen flows from the pipe connected to the liquid nitrogen tank into the wedge-shaped channel 121, and then flows into the first channel 111 and into the ball mill jar 13 to mix with the torch flower root slices and their adulterants. It also includes a sealing assembly 2, which includes a first permanent magnet 21 and a sealing ball 22. The first permanent magnet 21 consists of two symmetrically arranged semi-circular permanent magnets, with their end faces touching each other. This ensures that the first permanent magnet 21 always engages with the sealing ball when the mill jar 13 rotates. The width of the first permanent magnet 21 is smaller than the inner diameter of the first through groove 111, creating a gap between the first permanent magnet 21 and the first through groove 111. After the sealing ball 22 moves away from the wedge-shaped through groove 121, liquid nitrogen can flow through this gap into the feed inlet and into the mill jar 13. The sealing ball 22 has a seal that engages with the first permanent magnet 21. The third permanent magnet repels the first permanent magnet 21, causing the sealing ball 22 to repel the first permanent magnet 21. The diameter of the sealing ball 22 is not less than the diameter of the opening of the wedge-shaped groove 121, so that the sealing ball 22 can completely block the opening of the wedge-shaped groove 121 under the action of centrifugal force, thereby sealing the wedge-shaped groove 121. The first groove 111 has a sliding groove, and the first permanent magnet 21 is slidably connected to the sliding groove. The wedge-shaped groove 121 has a sliding groove, and the sealing ball 22 is slidably connected to the sliding groove. The sealing ball 22 is connected to a tension spring 23, and the free end of the tension spring 23 is fixedly located in the pipe connected to the wedge-shaped groove 121. It should be noted that the outer surfaces of the first permanent magnet 21, the sealing ball 22, and the tension spring 23 are all coated with an antifreeze coating to prevent liquid nitrogen from affecting their fit.

[0038] The specific working conditions are as follows: After the Torch Flower Root Slices and their adulterants are placed into the ball mill jar 13, the ball mill jar 13 is driven to rotate by a variable speed motor. The first permanent magnet 21 moves in the first through groove 111 under the action of the centrifugal force generated by the rotation of the ball mill jar 13, so that the distance between the first permanent magnet 21 and the sealing ball 22 becomes smaller. And because the first permanent magnet 21 and the sealing ball 22 are magnetically repelled, the sealing ball 22 moves away from the opening of the wedge-shaped through groove 121. The liquid nitrogen in the liquid nitrogen tank flows to the wedge-shaped through groove 121 through the pipe, and then flows through the first through groove 111 and finally flows into the ball mill jar 13 to mix with the medicinal materials. When the ball mill speed reaches the critical speed (40-50 r / min), the first permanent magnet 21, under the influence of a large centrifugal force, slides to the limit position of the first through groove 111. At this point, the distance between the first permanent magnet 21 and the sealing ball 22 is the closest, and the repulsive force between them is the greatest. This causes the sealing ball 22 to slide to the limit position within the wedge-shaped through groove 121, thereby maximizing the opening of the wedge-shaped through groove 121 and maximizing the amount of liquid nitrogen flowing into the ball mill jar 13 (see...). Figure 4 When the ball mill speed decreases from the critical speed to (20-30 r / min), the first permanent magnet 21 is subjected to a smaller centrifugal force. Furthermore, when rotating to the upper semicircular trajectory, it does not move to the extreme position of the first through groove 111 due to its own gravity. At this time, the distance between the first permanent magnet 21 and the sealing ball 22 increases, and their repulsive force decreases. This causes the sealing ball 22, driven by the tension spring 23, to move closer to the opening of the wedge-shaped through groove 121. Consequently, the opening size of the wedge-shaped through groove 121 decreases, and the amount of liquid nitrogen flowing into the ball mill jar 13 decreases (see...). Figure 3 ).

[0039] Please see Figure 5 The liquid nitrogen ball mill 1 includes a grinding jar 13 with an inner cylinder 131 and an outer cylinder 132. The inner cylinder 131 and the outer cylinder 132 are coaxially connected, and a cavity 133 is provided between the inner cylinder 131 and the outer cylinder 132. The outer cylinder 132 has a discharge port that communicates with the cavity 133. The discharge port is equipped with a baffle plate. When discharge is required, the baffle plate is opened to allow the powdered medicinal materials in the cavity to be discharged outside the ball mill. The inner cylinder 131 has a second through groove. The mill also includes a sieving assembly 3, which includes a baffle 31 and a sieve plate 32. The radii of curvature of the baffle 31 and the sieve plate 32 are equal to the radii of curvature of the inner cylinder 131. To reduce friction between the baffle 31 and sieve plate 32 and the second through groove, and to increase the frequency of the baffle 31 and sieve plate 32 rotating back and forth in the second through groove, one end of the baffle 31 and sieve plate 32 is fixedly connected, and the baffle 31 and sieve plate 32 are slidably disposed in the second through groove. A guide groove is provided in the inner cylinder 131, and both the baffle 31 and sieve plate 32 are slidably connected to the guide groove. A spring 33 is connected to the other end of the sieve plate 32, and the free end of the spring 33 is fixedly connected to the inner cylinder 131. A second permanent magnet 34 is connected to the sieve plate 32, and an electromagnet 35 is provided in the inner cylinder 131. The electromagnet 35 is used to attract the second permanent magnet 34 when energized.

[0040] Specific operating conditions: After the medicinal materials are ground into fine powder, the electromagnet 35 is energized, causing its coil to attract the second permanent magnet 34. This causes the sieve plate 32 to move the baffle 31 towards the electromagnet 35 and compress the spring 33. Then, the electromagnet 35 is de-energized, and the sieve plate 32 and the baffle 31 are reset under the action of the spring 33. The sieve plate 32 rotates back and forth in the second through groove, and the baffle 31 rotates away from the cavity 133, causing the sieve plate 32 to rotate back and forth in the cavity 133. This separates the medicinal powder into the cavity 133, achieving the separation of the medicinal powder from the grinding beads. Finally, the baffle plate is opened to discharge the material.

[0041] Please see Figures 2-4 The screening assembly 3 also includes a drive unit 36, which includes a touch switch 361 and a return spring 362. The return spring 362 has an antifreeze coating and is fixedly connected to the first through groove 111. The free end of the return spring 362 is fixedly connected to the first permanent magnet 21. The touch switch 361 is located in the first through groove 111 and has a flexible protective sleeve. The first permanent magnet 21 is used to abut the touch switch 361. The touch switch 361 is electrically connected to the electromagnet 35 and is used to give the electromagnet 35 an electrical pulse when it is abutted. When the ball mill jar 13 rotates, the first permanent magnet 21 is moved away from the touch switch 361 by centrifugal force and stretches the return spring 362. At this time, the electromagnet 35 is in a de-energized state. When the ball mill jar 13 stops rotating, the first permanent magnet 21 loses the centrifugal force and is reset to its initial position under the action of the reset spring 362, thereby contacting the touch switch 361, which in turn sends an electrical pulse signal to the electromagnet 35, causing the electromagnet 35 to be energized and de-energized, thereby attracting the screen plate 32 and the baffle 31, and screening the material under the action of the spring 33 after the power is de-energized.

[0042] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An apparatus for identifying Torchflower root and its adulterants, comprising a liquid nitrogen ball mill (1), a DNA extraction kit, and a PCR amplification instrument connected in sequence, characterized in that; The liquid nitrogen ball mill (1) is connected to a variable speed motor. The feed inlet (11) of the liquid nitrogen ball mill (1) has a first through-slot (111) connected to the feed inlet (11). The bearing seat (12) of the liquid nitrogen ball mill (1) has a wedge-shaped through-slot (121) connected to the first through-slot (111). The wedge-shaped through-slot (121) is connected to the liquid nitrogen tank via a pipe. It also includes a seal. The sealing assembly (2) includes a first permanent magnet (21) and a sealing ball (22). The first permanent magnet (21) and the sealing ball (22) are magnetically repulsive. The first permanent magnet (21) is slidably disposed in the first through groove (111). The sealing ball (22) is slidably disposed in the wedge-shaped through groove (121) and is connected to a tension spring (23). The free end of the tension spring (23) is fixedly disposed in the pipe connected to the wedge-shaped through groove (121).

2. The device for identifying Torchflower Root and its adulterants according to claim 1, characterized in that: Both the first through groove (111) and the wedge-shaped through groove (121) are provided with sliding grooves, and the first permanent magnet (21) and the sealing ball (22) are slidably connected to the sliding grooves respectively.

3. The device for identifying Torchflower Root and its adulterants according to claim 1, characterized in that: The diameter of the sealing ball (22) is not less than the diameter of the opening of the wedge-shaped through groove (121).

4. The device for identifying Torchflower Root and its adulterants according to claim 1, characterized in that: The width of the first permanent magnet (21) is smaller than the inner diameter of the first through groove (111).

5. The device for identifying Torchflower Root and its adulterants according to claim 4, characterized in that: The first through groove (111) is an annular through groove, and the first permanent magnet (21) consists of two symmetrically arranged semi-circular permanent magnets, with the end faces of the two first permanent magnets (21) touching each other.

6. The device for identifying Torchflower Root and its adulterants according to claim 1, characterized in that: The ball mill (1) of the liquid nitrogen ball mill (1) has a grinding jar (13) with an inner cylinder (131) and an outer cylinder (132). The inner cylinder (131) and the outer cylinder (132) are coaxially connected. A cavity (133) is provided between the inner cylinder (131) and the outer cylinder (132). The inner cylinder (131) has a second through groove. The mill also includes a screening assembly (3). The screening assembly (3) includes a baffle (31) and a sieve plate (32). The baffle (31) and the sieve plate (32) are connected. One end of the plate (32) is fixedly connected, the baffle (31) and the sieve plate (32) are slidably disposed in the second through groove, the other end of the sieve plate (32) is connected to a spring (33), the free end of the spring (33) is fixedly connected to the inner cylinder (131), the sieve plate (32) is connected to a second permanent magnet (34), and an electromagnet (35) is provided in the inner cylinder (131). The electromagnet (35) is used to attract the second permanent magnet (34) when energized.

7. The device for identifying Torchflower Root and its adulterants according to claim 6, characterized in that: The outer cylinder (132) is provided with a discharge port, which is connected to the cavity (133) and is provided with a baffle plate.

8. The device for identifying Torchflower Root and its adulterants according to claim 6, characterized in that: The inner cylinder (131) is provided with a guide groove, and the baffle (31) and the sieve plate (32) are slidably connected to the guide groove.

9. The device for identifying Torchflower Root and its adulterants according to claim 6, characterized in that: The radii of curvature of the baffle (31) and the sieve plate (32) are equal to those of the inner cylinder (131).

10. The device for identifying Torchflower Root and its adulterants according to claim 6, characterized in that: The screening assembly (3) further includes a drive unit (36), which includes a touch switch (361) and a reset spring (362). The reset spring (362) is fixedly connected to the first through slot (111), and the free end of the reset spring (362) is fixedly connected to the first permanent magnet (21). The touch switch (361) is located in the first through slot (111), and the first permanent magnet (21) is used to abut against the touch switch (361). The touch switch (361) is electrically connected to the electromagnet (35).

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