Multi-stage grinding and screening equipment for production of polygonatum sibiricum powder

Abstract

The invention discloses multi-stage grinding and screening equipment for polygonatum sibiricum powder production. The multi-stage grinding and screening equipment comprises a multi-stage crushing and grinding box, a screening assembly and a driving part, the multi-stage crushing and grinding box is provided with a circular-truncated-cone-shaped shrinkage cavity, a plurality of groups of crushing and grinding cutters are mounted on the inner wall of the shrinkage cavity, and the adjacent crushing and grinding cutters are attached to each other, are in sliding contact and rotate in opposite directions; the screening assembly is arranged in the multi-stage crushing and grinding box, is located at the shrinkage end of the shrinkage cavity and is used for screening crushed and ground rhizoma polygonati powder and particles; the driving part is in transmission connection with the multi-stage smashing and grinding box and the screening assembly and used for driving the smashing and grinding cutter and the screening assembly to rotate. According to the rhizoma polygonati crushing and grinding device, the rhizoma polygonati is crushed and ground step by step by utilizing the adjacent crushing and grinding cutters which rotate in opposite directions, and in addition, the crushed and ground rhizoma polygonati can be collected and conveyed by the shrinkage cavity, so that the rhizoma polygonati can be in full contact with the crushing and grinding cutters, and the grinding quality of rhizoma polygonati powder is greatly improved.

Description

Technical Field

[0001] The invention relates to the field of grinding and screening equipment, in particular to a multi-stage grinding and screening equipment for producing polygonatum sibiricum powder. Background Art

[0002] Huangjing powder is the powder made from the Chinese medicinal material Huangjing. Huangjing powder is also rich in vitamin E, which is a powerful antioxidant that can protect cells from free radical damage, delay the aging process, and also has a good protective effect on the skin and eyes.

[0003] In the process of producing Polygonatum sibiricum powder, Polygonatum sibiricum needs to be crushed and ground. For example, the application number is 202410171140.9, and the patent name is an invention patent for a multi-stage grinding and screening machine and a multi-stage grinding method for the production of Polygonatum sibiricum powder. The patent includes a grinder, the outer wall of which is provided with a groove, and the left side of the grinder is fixedly connected with a storage box. The device utilizes the mutual alternation between push plate 1 and push plate 2, and controls the unloading port of the storage box through the control switch, so as to avoid adding too much raw material at one time, resulting in overload of the grinding and screening machine, and reduce the dust flying problem that may be caused by adding a large amount of raw materials at one time. Adding raw materials in batches can ensure that each batch of raw materials is fully ground and screened in the grinding and screening machine, thereby improving the grinding efficiency and the fineness of the finished product, better controlling the quality of each batch of products, ensuring uniformity and consistency, and grinding in batches can reduce the friction between the raw materials and the machine during one grinding, thereby effectively reducing machine wear and extending the service life of the machine.

[0004] However, this patent only controls the feeding amount to improve the grinding efficiency and the fineness of the finished product, and cannot make technical improvements to the grinding of the grinder, and thus cannot substantially control the fineness of the Polygonatum sibiricum powder, resulting in uneven fineness of the gold powder, thereby affecting the production quality of the Polygonatum sibiricum powder and having certain defects. Summary of the invention

[0005] The purpose of the present invention is to provide a multi-stage grinding and screening equipment for the production of polygonatum sibiricum powder, so as to realize the step-by-step crushing and grinding of polygonatum sibiricum, improve the fineness of polygonatum sibiricum powder, and thus improve the quality of polygonatum sibiricum powder.

[0006] In order to solve the above technical problems, the present invention provides a multi-stage grinding and screening equipment for the production of polygonatum sibiricum powder, comprising a multi-stage crushing and grinding box, a screening component and a driving member; The multi-stage crushing and grinding box has a truncated cone-shaped contraction cavity, and multiple groups of crushing and grinding knives are installed on the inner wall of the contraction cavity. Adjacent crushing and grinding knives are in close contact and sliding contact, and the adjacent crushing and grinding knives rotate in opposite directions. The screening component is arranged in the multi-stage crushing and grinding box, and the screening component is located at the contraction end of the contraction cavity, and the screening component is used to screen the crushed and ground polygonatum powder and particles; The driving member is in transmission connection with the multi-stage crushing and grinding box and the screening assembly, and the driving member is used for driving the crushing and grinding knife and the screening assembly to rotate.

[0007] Furthermore, the multi-stage crushing and grinding box includes a mounting cylinder, a driving ring and a transmission member; The driving ring is provided in plurality, and the plurality of driving rings are rotatably mounted on the inner wall of the mounting tube, the driving ring has a mounting inner cavity, and the crushing and grinding blade is fixedly mounted on the inner wall of the mounting inner cavity; The transmission member is disposed between two adjacent driving rings, and is used for reversely transmitting the two adjacent driving rings.

[0008] Furthermore, the driving ring is rotatably mounted on the inner wall of the mounting tube via a bearing, and mounting grooves are provided at both ends of the outer edges of the driving ring along the axial direction, and the mounting grooves are used to mount the transmission member.

[0009] Furthermore, the transmission member includes a driving gear ring and a transmission gear; There are two driving gear rings, and the two driving gear rings are respectively fixedly installed in the installation grooves of two adjacent driving rings; The transmission gear is rotatably mounted on the inner wall of the mounting tube via a rotating shaft, and the transmission gear is meshedly connected with two adjacent driving gear rings.

[0010] Furthermore, two adjacent driving rings are fitted and in sliding contact with each other, and the installation inner cavities on the driving rings at different positions form the contraction cavity.

[0011] Furthermore, the crushing and grinding knife includes a plurality of blades, and the plurality of blades are circular and evenly distributed on the inner wall of the installation cavity.

[0012] Further, the screening assembly includes a connecting mounting frame and a cylindrical mesh screen; The connecting mounting frame is fixedly mounted on the outer side wall of the mounting tube; The cylindrical mesh screen is rotatably mounted on the connecting mounting frame, and has a feed end and a particle discharge end. The feed end is fixedly connected to the drive ring located at the end of the mounting cylinder, and the particle discharge end is provided with a collecting trough.

[0013] Furthermore, a transparent cover is provided on the outside of the cylindrical mesh screen, a finished product collection channel is provided at the bottom of the transparent cover, and the finished product collection channel is located between the feed end and the particle discharge end.

[0014] Furthermore, the driving member includes a driving ring gear, a driving gear and a driving motor; The driving gear ring is fixedly mounted on the outer side wall of the driving ring located at the end of the mounting cylinder; The driving gear is fixedly mounted on the output shaft of the driving motor, and the driving gear is meshedly connected with the driving gear ring; The driving motor is fixedly mounted on the outer side wall of the mounting tube.

[0015] Furthermore, the driving motor is a servo motor.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: The present invention utilizes adjacent counter-rotating crushing and grinding knives to crush and grind the polygonatum step by step, and can crush and grind the polygonatum step by step. In addition, the contraction chamber can close, collect and transport the crushed and ground polygonatum, so that the polygonatum can fully contact the crushing and grinding knives, thereby greatly improving the grinding quality of the polygonatum powder.

[0017] Furthermore, after the polygonatum is crushed and ground, the polygonatum granules and polygonatum powder are screened by a screening component, and then the final polygonatum powder product can be obtained, which ensures the powder state of the product and improves the quality of the polygonatum powder product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the multi-stage grinding and screening equipment for producing polygonatum sibiricum powder of the present invention; Figure 2 It is a schematic cross-sectional structure diagram of a multi-stage grinding and screening device for producing polygonatum sibiricum powder of the present invention; Figure 3 It is an enlarged structural schematic diagram of structure A of the multi-stage grinding and screening equipment for producing polygonatum sibiricum powder of the present invention; Figure 4 This is a schematic diagram of the crushing and grinding state structure of the crushing and grinding knives of the multi-stage grinding and screening equipment for producing polygonatum odoratum powder of the present invention; Figure 5 It is a schematic diagram of the drive ring structure at a non-end position of the multi-stage grinding and screening equipment for producing polygonatum sibiricum powder of the present invention; Figure 6 The present invention is a schematic diagram of the structure of the end drive ring close to the screening component of the multi-stage grinding and screening equipment for producing polygonatum sibiricum powder.

[0019] In the figure: 1. Multi-stage crushing and grinding box; 2. Screening component; 3. Driving part; 4. Contraction chamber; 5. Crushing and grinding knife; 6. Mounting cylinder; 7. Driving ring; 8. Mounting inner cavity; 9. Mounting groove; 10. Driving gear ring; 11. Transmission gear; 12. Connecting mounting frame; 13. Cylindrical screen; 14. Collecting groove; 15. Transparent cover; 16. Finished product collecting channel; 17. Maintenance window; 18. Driving gear ring; 19. Driving gear; 20. Driving motor; 21. Transmission window. DETAILED DESCRIPTION

[0020] The following will be described in more detail with reference to the schematic diagram of the multi-stage grinding and screening device for producing polygonatum sibiricum powder of the present invention, wherein a preferred embodiment of the present invention is shown, and it should be understood that those skilled in the art can modify the present invention described herein, while still achieving the advantageous effects of the present invention. Therefore, the following description should be understood as being widely known to those skilled in the art, and not as a limitation of the present invention.

[0021] The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the accompanying drawings are in very simplified form and are not in exact proportions, and are only used to facilitate and clearly assist in illustrating the purpose of the embodiments of the present invention.

[0022] like Figure 1 As shown, an embodiment of the present invention provides a multi-stage grinding and screening device for producing polygonatum sibiricum powder, including a multi-stage crushing and grinding box 1, a screening component 2 and a driving member 3.

[0023] Specifically, the multi-stage crushing and grinding box 1 has a truncated cone-shaped contraction chamber 4, and multiple groups of crushing and grinding knives 5 are installed on the inner wall of the contraction chamber 4. Adjacent crushing and grinding knives 5 are in close contact and sliding contact, and the adjacent crushing and grinding knives 5 rotate in opposite directions.

[0024] The screening component 2 is arranged in the multi-stage crushing and grinding box 1, and the screening component 2 is located at the contraction end of the contraction cavity 4. The screening component 2 is used to screen the crushed and ground polygonatum powder and particles.

[0025] The driving member 3 is in driving connection with the multi-stage crushing and grinding box 1 and the screening assembly 2, and the driving member 3 is used to drive the crushing and grinding knife 5 and the screening assembly 2 to rotate.

[0026] In this embodiment, a hopper (not shown) can be provided at one end of the crushing and grinding box away from the screening component 2, for filling the raw material of polygonatum into the crushing and grinding box. In addition, the diameter of the end of the contraction chamber 4 close to the hopper is larger than the end away from the hopper. On the one hand, it is convenient to fill the raw material of polygonatum; on the other hand, as the raw material of polygonatum is crushed and ground, the fineness of the raw material of polygonatum is continuously reduced. When the raw material of polygonatum moves toward the side of the screening component 2, the moving cross-section of the raw material of polygonatum is continuously reduced, and the crushing and grinding knife 5 can fully crush and grind the raw material of polygonatum, thereby improving the crushing and grinding fineness of the raw material of polygonatum.

[0027] During the process of crushing and grinding the polygonatum, the polygonatum raw material in the hopper is added into the crushing and grinding box, and the crushing and grinding knife 5 rotates under the drive of the driving member 3. After the polygonatum raw material enters the contraction chamber 4, the crushing and grinding knife 5 crushes and grinds the polygonatum raw material. As the polygonatum raw material moves toward the side of the screening component 2, the fineness of the polygonatum raw material is continuously reduced, and at the same time, the flow cross section of the polygonatum raw material is continuously reduced, and the polygonatum raw material can fully contact with the crushing and grinding knife 5, so that the polygonatum raw material is fully crushed and ground.

[0028] The ground raw materials of polygonatum sibiricum are screened by the screening component 2 for fineness screening, and the polygonatum sibiricum powder that meets the fineness requirements is screened and discharged. At the same time, the polygonatum sibiricum particles that do not meet the fineness requirements are removed and collected from the screening component 2. The collected polygonatum sibiricum particles can be added to the hopper for further grinding.

[0029] In order to control the feeding speed of the raw material of polygonatum sibiricum in the contraction chamber 4, the multi-stage grinding and screening device can be installed on a bracket with an adjustable inclination angle, and the moving speed of the raw material of polygonatum sibiricum in the contraction chamber 4 can be changed by controlling the inclination angle of the contraction chamber 4. Among them, the bracket with an adjustable inclination angle can adopt the existing technology, and its specific structure is not repeated here.

[0030] Furthermore, the multi-stage crushing and grinding box 1 includes a mounting cylinder 6, a driving ring 7 and a transmission member.

[0031] Specifically, Figure 2 As shown, the driving ring 7 is provided in plurality, and the plurality of driving rings 7 are rotatably mounted on the inner wall of the mounting tube 6 , the driving ring 7 has a mounting inner cavity 8 , and the crushing and grinding knife 5 is fixedly mounted on the inner wall of the mounting inner cavity 8 .

[0032] The transmission member is disposed between two adjacent driving rings 7 , and is used for reversely transmitting the two adjacent driving rings 7 .

[0033] In this embodiment, the driving ring 7 is rotatably mounted on the inner wall of the mounting tube 6 through a bearing, and mounting grooves 9 are provided at both ends of the outer edges of the driving ring 7 along the axial direction, and the mounting grooves 9 are used to mount the transmission member. In addition, the crushing and grinding blade 5 includes a plurality of blades, and the plurality of blades are circumferentially and evenly distributed on the inner wall of the mounting inner cavity 8.

[0034] When the crushing and grinding knife 5 crushes and grinds the raw material of Polygonatum odoratum, since the aperture of the contraction chamber 4 near one end of the hopper is larger, the raw material of Polygonatum odoratum is easy to move between the two crushing and grinding knives 5 located on the two adjacent driving rings 7, and the raw material of Polygonatum odoratum is crushed and ground by the shear force between the two crushing and grinding knives 5. As the raw material of Polygonatum odoratum moves, the fineness of the raw material of Polygonatum odoratum is continuously reduced, and at the same time, the gap between the two crushing and grinding knives 5 located on the two adjacent driving rings 7 is also continuously reduced, so that the raw material of Polygonatum odoratum can fully contact and crush and grind with the two adjacent crushing and grinding knives 5, which greatly improves the crushing and grinding fineness of the raw material of Polygonatum odoratum.

[0035] Different from the prior art, the two crushing and grinding knives 5 located on two adjacent driving rings 7 rotate in opposite directions. Figure 4 As shown, the edges of two adjacent crushing and grinding knives 5 can be used to generate shear force, thereby crushing and grinding the raw material of Polygonatum. In addition, the two adjacent crushing and grinding knives 5 turn in opposite directions, and the time for the raw material of Polygonatum to pass through the gap between the two adjacent crushing and grinding knives 5 is reduced, so that the crushing and grinding knives 5 can fully crush and grind the raw material of Polygonatum, thereby improving the production quality of Polygonatum powder.

[0036] Furthermore, the transmission member includes a driving gear ring 10 and a transmission gear 11 .

[0037] Specifically, Figure 3 and Figure 5 As shown, two driving gear rings 10 are provided, and the two driving gear rings 10 are respectively fixedly installed in the installation grooves 9 of two adjacent driving rings 7.

[0038] The transmission gear 11 is rotatably mounted on the inner wall of the mounting tube 6 via a rotating shaft, and the transmission gear 11 is meshedly connected with two adjacent driving gear rings 10 .

[0039] In this embodiment, the driving ring 7 has a mounting groove 9 along its outer edge in the opposite direction of the axial direction, and the driving gear ring 10 is fixedly installed in the mounting groove 9 .

[0040] Driven by the driving member 3, one of the driving rings 7 rotates, and the adjacent driving ring 7 rotates under the drive of the transmission gear 11, and the adjacent driving rings 7 and the crushing and grinding knives 5 installed on the driving rings 7 turn in opposite directions, and the shear force of the two adjacent crushing and grinding knives 5 is used to crush and grind the Polygonatum raw material.

[0041] In a specific embodiment, two adjacent drive rings 7 are fitted and in sliding contact, and the installation inner cavity 8 on the drive rings 7 at different positions forms the contraction cavity 4. The adjacent drive rings 7 are fitted and in sliding contact, so that the installation inner cavity 8 of the drive ring 7 can form a smooth contraction cavity 4, which greatly reduces the residual polygonatum powder in the gap between adjacent drive rings 7 and reduces the waste of polygonatum powder. At the same time, the smooth contraction cavity 4 facilitates the sliding of the polygonatum raw material, thereby ensuring the smooth progress of the crushing and grinding process of the polygonatum raw material.

[0042] Furthermore, the screening assembly 2 includes a connecting mounting frame 12 and a cylindrical mesh screen 13 .

[0043] Specifically, the connecting mounting frame 12 is fixedly mounted on the outer side wall of the mounting tube 6 .

[0044] The cylindrical mesh screen 13 is rotatably mounted on the connecting mounting frame 12 , and has a feed end and a particle discharge end. The feed end is fixedly connected to the drive ring 7 located at the end of the mounting cylinder 6 , and the particle discharge end is provided with a collecting trough 14 .

[0045] In this embodiment, driven by the driving member 3, the cylindrical mesh screen 13 rotates, and the ground raw material of Polygonatum odoratum enters the cylindrical mesh screen 13 from the feed end. During the rotation of the cylindrical mesh screen 13, the powder in the ground raw material of Polygonatum odoratum can be screened and discharged from the bottom of the cylindrical mesh screen 13. At the same time, the granular raw material of Polygonatum odoratum is discharged from the discharge end and collected by the collecting tank 14. The mesh screen assembly realizes the screening process of Polygonatum odoratum powder, screens and collects Polygonatum odoratum powder that meets the fineness, and obtains Polygonatum odoratum powder that meets the strength requirements.

[0046] In a specific embodiment, a transparent cover 15 is provided on the outside of the cylindrical mesh screen 13, and a finished product collection channel 16 is provided at the bottom of the transparent cover 15, and the finished product collection channel 16 is located between the feed end and the particle discharge end. On the one hand, the transparent cover 15 can reduce the lifting of the polygonatum sibiricum powder and reduce the loss of the polygonatum sibiricum powder. On the other hand, the screening process of the polygonatum sibiricum powder can be intuitively observed, and when the cylindrical mesh screen 13 is blocked, the cylindrical mesh screen 13 can be cleaned in time.

[0047] It should be noted that the mesh size of the cylindrical mesh screen 13 is determined according to the fineness requirement of the polygonatum sibiricum powder, so as to screen out the polygonatum sibiricum powder that meets the fineness requirement. In addition, a maintenance window 17 is movably provided on the top of the transparent cover 15 .

[0048] Furthermore, the driving member includes a driving ring gear 18 , a driving gear 19 and a driving motor 20 .

[0049] Specifically, the driving gear ring 18 is fixedly mounted on the outer side wall of the driving ring 7 located at the end of the mounting tube 6 .

[0050] The driving gear 19 is fixedly mounted on the output shaft of the driving motor 20 , and the driving gear 19 is meshedly connected with the driving gear ring 18 .

[0051] The driving motor 20 is fixedly mounted on the outer side wall of the mounting tube 6 .

[0052] In this embodiment, if Figure 1 and Figure 6 As shown, a transmission window 21 is provided on the transparent cover 15, and the bottom end of the driving gear 19 passes through the transmission window 21 and is meshed with the driving gear ring 18. Driven by the driving motor 20, the driving ring 7 at the end of the mounting cylinder 6 rotates, thereby driving the other driving rings 7 and the crushing and grinding blades 5 to rotate, thereby crushing and grinding the raw material of the polygonatum. At the same time, the cylindrical mesh screen 13 connected to the driving ring 7 rotates, and the crushed and ground raw material of the polygonatum is screened.

[0053] In a specific embodiment, the drive motor 20 is a servo motor. The servo motor can control the speed, and the position accuracy is very accurate. It can convert the voltage signal into torque and speed to drive the control object. The rotor speed of the servo motor is controlled by the input signal and can respond quickly. In the automatic control system, it is used as an actuator and has the characteristics of small electromechanical time constant and high linearity. It can convert the received electrical signal into angular displacement or angular velocity output on the motor shaft. The drive motor 20 is a servo motor, which can control the speed of the crushing and grinding knife 5 and the cylindrical mesh screen 13, thereby achieving a good crushing and grinding effect.

[0054] Compared with the prior art, the present invention has at least the following beneficial effects: The present invention utilizes adjacent counter-rotating crushing and grinding knives to crush and grind the polygonatum step by step, and can crush and grind the polygonatum step by step. In addition, the contraction chamber can close, collect and transport the crushed and ground polygonatum, so that the polygonatum can fully contact the crushing and grinding knives, thereby greatly improving the grinding quality of the polygonatum powder.

[0055] Furthermore, after the polygonatum is crushed and ground, the polygonatum granules and polygonatum powder are screened by a screening component, and then the final polygonatum powder product can be obtained, which ensures the powder state of the product and improves the quality of the polygonatum powder product.

[0056] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A multi-stage grinding and screening equipment for producing polygonatum sibiricum powder, characterized in that: It comprises a multi-stage crushing and grinding box (1), a screening component (2) and a driving component (3); The multi-stage crushing and grinding box (1) has a truncated cone-shaped contraction chamber (4), and a plurality of groups of crushing and grinding knives (5) are installed on the inner wall of the contraction chamber (4), and adjacent crushing and grinding knives (5) are in close contact and sliding contact, and the adjacent crushing and grinding knives (5) rotate in opposite directions; The screening component (2) is arranged on the multi-stage crushing and grinding box (1), and the screening component (2) is located at the contraction end of the contraction cavity (4), and the screening component (2) is used to screen the crushed and ground polygonatum powder and particles; The driving member (3) is in transmission connection with the multi-stage crushing and grinding box (1) and the screening assembly (2), and the driving member (3) is used to drive the crushing and grinding knife (5) and the screening assembly (2) to rotate.

2. The multi-stage grinding and screening equipment for producing polygonatum odoratum powder according to claim 1, characterized in that: The multi-stage crushing and grinding box (1) comprises a mounting cylinder (6), a driving ring (7) and a transmission member; A plurality of the drive rings (7) are provided, and the plurality of the drive rings (7) are rotatably mounted on the inner wall of the mounting tube (6); the drive ring (7) has a mounting inner cavity (8), and the crushing and grinding blade (5) is fixedly mounted on the inner wall of the mounting inner cavity (8); The transmission member is arranged between two adjacent drive rings (7), and the transmission member is used to transmit the two adjacent drive rings (7) in reverse direction.

3. The multi-stage grinding and screening equipment for producing polygonatum odoratum powder according to claim 2, characterized in that: The drive ring (7) is rotatably mounted on the inner wall of the mounting tube (6) via a bearing, and mounting grooves (9) are provided at both ends of the outer edges of the drive ring (7) along the axial direction, and the mounting grooves (9) are used to mount the transmission member.

4. The multi-stage grinding and screening equipment for producing polygonatum odoratum powder according to claim 3, characterized in that: The transmission member comprises a driving gear ring (10) and a transmission gear (11); Two driving gear rings (10) are provided, and the two driving gear rings (10) are respectively fixedly mounted in the mounting grooves (9) of two adjacent driving rings (7); The transmission gear (11) is rotatably mounted on the inner wall of the mounting cylinder (6) via a rotating shaft, and the transmission gear (11) is meshingly connected with two adjacent driving gear rings (10).

5. The multi-stage grinding and screening equipment for producing polygonatum odoratum powder according to claim 2, characterized in that: Two adjacent drive rings (7) are fitted and in sliding contact with each other, and the installation inner cavities (8) on the drive rings (7) at different positions form the contraction cavity (4).

6. The multi-stage grinding and screening equipment for producing polygonatum odoratum powder according to claim 2, characterized in that: The crushing and grinding knife (5) comprises a plurality of blades, and the plurality of blades are arranged in a circular shape and evenly distributed on the inner wall of the mounting inner cavity (8).

7. The multi-stage grinding and screening equipment for producing polygonatum odoratum powder according to claim 2, characterized in that: The screening assembly (2) comprises a connecting mounting frame (12) and a cylindrical mesh screen (13); The connecting mounting frame (12) is fixedly mounted on the outer side wall of the mounting tube (6); The cylindrical mesh screen (13) is rotatably mounted on the connecting mounting frame (12), the cylindrical mesh screen (13) having a feed end and a particle discharge end, the feed end being fixedly connected to the drive ring (7) located at the end of the mounting cylinder (6), and the particle discharge end being provided with a collecting trough (14).

8. The multi-stage grinding and screening equipment for producing polygonatum odoratum powder according to claim 7, characterized in that: A transparent cover shell (15) is arranged outside the cylindrical mesh screen (13), a finished product collection channel (16) is arranged at the bottom of the transparent cover shell (15), and the finished product collection channel (16) is located between the feed end and the particle discharge end.

9. The multi-stage grinding and screening equipment for producing polygonatum odoratum powder according to claim 2, characterized in that: The driving member (3) comprises a driving ring gear (18), a driving gear (19) and a driving motor (20); The driving gear ring (18) is fixedly mounted on the outer side wall of the driving ring (7) located at the end of the mounting tube (6); The driving gear (19) is fixedly mounted on the output shaft of the driving motor (20), and the driving gear (19) is meshingly connected with the driving gear ring (18); The driving motor (20) is fixedly mounted on the outer side wall of the mounting cylinder (6).

10. The multi-stage grinding and screening equipment for producing polygonatum odoratum powder according to claim 9, characterized in that: The driving motor (20) is a servo motor.

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