A multi-channel hollow, spreading, and grading rotary drum

Abstract

This invention discloses a multi-channel hollow, spreading, and grading rotary drum, comprising: multiple material discharge sections and sorting sections arranged sequentially from the inside out, each with an independent channel above it; wherein, the sorting section includes an annular rotating frame composed of multiple grading plate components, the annular rotating frame being positioned outside the outermost material discharge section, and an independent channel above it. This invention provides a multi-channel hollow, spreading, and grading rotary drum. When the drum rotates, grading and discharging occur in each channel connected to the material discharge section. Coarse powder falling from the independent channel into the innermost material discharge section falls downwards, while medium powder falling from the independent channel into the outermost material discharge section is lifted upwards by the rotation of the annular rotating frame and collides with the grading plate components, causing the medium powder to fall back down. Fine powder passes through the grading plate components and is then fed into the independent channel connected to the sorting section. This allows for targeted multi-stage sorting, improving sorting efficiency and reducing sorting energy consumption.

Description

Technical Field

[0001] This invention relates to the field of powder selection technology, and more specifically, to a multi-channel hollow, spreading, and grading rotary drum. Background Technology

[0002] A classifier is an industrial device used in various industries. It is the core equipment of closed-circuit grinding and is used in conjunction with grinding equipment to promptly select qualified fine powder that has been ground to a certain particle size, while returning coarse powder to the grinding equipment for further grinding, reducing over-grinding and improving the grinding efficiency of the grinding equipment. The particle size distribution of the selected product can be adjusted by regulating the rotation speed of the classifier.

[0003] Currently, the air classifiers in use all have single-channel feed, which makes it impossible to perform targeted grading and classification, resulting in low sorting efficiency and an inability to reduce sorting energy consumption. Summary of the Invention

[0004] To achieve the above objectives, the present invention discloses a multi-channel hollow, spreading, and grading rotating drum, comprising: multiple material dropping sections and sorting sections arranged sequentially from the inside out, with independent channels above the material dropping sections and sorting sections;

[0005] The sorting section includes an annular rotating frame composed of multiple grading sheet components. The annular rotating frame is located outside the outermost unloading section, and an independent channel is provided above the annular rotating frame.

[0006] Preferably, the material feeding section includes:

[0007] Central tube;

[0008] A rotating shaft mounting sleeve is located inside the central cylinder, and an inner material discharge channel is formed between the rotating shaft mounting sleeve and the central cylinder. An independent channel is provided above the inner material discharge channel.

[0009] An inner mounting rod, wherein multiple inner mounting rods are arranged in a circular array between the central cylinder and the rotating shaft mounting sleeve.

[0010] Preferably, the material feeding section further includes:

[0011] An outer fixed ring, the central cylinder is located inside the outer fixed ring, an outer discharge channel is formed between the central cylinder and the outer fixed ring, an independent channel is provided above the outer discharge channel, and the annular rotating frame is installed on the outer ring of the outer fixed ring;

[0012] External mounting rods, multiple external mounting rods are arranged in a circular array between the outer fixing ring and the central cylinder.

[0013] Preferably, multiple grading blades are circumferentially installed at the bottom end of the central cylinder, with one grading blade located below the outer material discharge channel.

[0014] Preferably, adjacent grading sheet assemblies are connected by fixing bolts, and the grading sheet assembly includes:

[0015] Fan-shaped support frame;

[0016] Five graded plates are evenly spaced within the fan-shaped support frame.

[0017] Preferably, multiple grading blades are circumferentially mounted on the bottom end of the rotating shaft mounting sleeve, and the second grading blade is located below the inner material discharge channel.

[0018] Preferably, the graded sheet assembly further includes:

[0019] Card holders, an equal number of card holders to the grading pieces, are installed on the inner ring of the fan-shaped support frame away from the outer fixed ring. The card holders are provided with side mounting slots. One end of the grading piece is fitted with a card post that is locked in the side mounting slot. The slot opening of the side mounting slot is set in an open-mouth manner.

[0020] Locking seats, an equal number of which are set with the grading plates, are installed on the inner ring of the sector-shaped support frame near the outer fixed ring. The locking chamber is located inside the locking seat, and the locking plate is located inside the locking chamber. One end of the locking plate extends out of the locking chamber and is equipped with a locking rod. The other end of the grading plate is equipped with a mounting hole for connecting to the locking rod. A double-ended screw is rotatably installed inside the locking chamber. Two sliders are sleeved on the double-ended screw and are respectively connected to the other end of the locking plate through a support connecting rod.

[0021] Preferably, the graded sheet assembly further includes:

[0022] A locking mechanism is embedded in a locking seat and extends into a locking chamber. The locking mechanism includes a side mounting chamber opened on the inner wall of the locking chamber, a locking plate sealing the side mounting chamber near the end of the locking chamber, and a liquid inlet chamber located in the locking seat and connected to the side mounting chamber.

[0023] A centrifugal drive mechanism is installed at the bottom of the outer fixed ring and is connected to the liquid inlet chamber through a liquid inlet channel.

[0024] Preferably, the locking mechanism further includes:

[0025] A vertical lever, which is rotatably mounted on the side of the locking seat via a mounting bracket;

[0026] A push rod, one end of which is connected to a vertical lever, and the other end of which extends into the side mounting chamber and abuts against the movable end of the locking plate;

[0027] Guide rod one, one end of which is connected to the end of the vertical lever away from the top rod, and the other end of which extends into the liquid inlet chamber;

[0028] The liquid inlet plate is installed in the liquid inlet chamber and divides the liquid inlet chamber into two independent chambers. The liquid inlet channel is connected to the chamber near the side mounting chamber. The liquid inlet plate is provided with a liquid inlet hole.

[0029] A blocking plate is located in the chamber away from the side installation chamber and is configured to block the liquid inlet plate. The other end of the guide rod is installed on the blocking plate, and a return spring is sleeved on the guide rod and abuts against the inner wall of the blocking plate and the liquid inlet chamber.

[0030] Preferably, the centrifugal drive mechanism includes:

[0031] An annular centrifuge seat is installed at the bottom of the outer fixing ring. Five liquid storage chambers are circumferentially distributed inside the annular centrifuge seat and store oil. The liquid inlet channel is connected to the liquid storage chambers.

[0032] A stopper plate, the stopper plate being located within the liquid storage chamber;

[0033] Five centrifuge rods are circumferentially mounted at the bottom of an annular centrifuge base, and centrifuge balls are mounted on the centrifuge rods;

[0034] The flipping rod is bent at an obtuse angle and is rotatably mounted on the side of the annular centrifuge seat via a mounting bracket. One end of the flipping rod is connected to the centrifuge rod, and the other end of the flipping rod is connected to a guide rod. The guide rod extends into the liquid storage chamber away from the end of the flipping rod and is connected to the stopper plate. Attached Figure Description

[0035] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of the present invention;

[0037] Figure 2 This is a top view of the present invention;

[0038] Figure 3 This is a schematic diagram of the graded sheet assembly structure of the present invention;

[0039] Figure 4 This is a schematic diagram of the mounting of the graded plates according to the present invention;

[0040] Figure 5 This is a cross-sectional view of the locking seat of the present invention;

[0041] Figure 6 This is a schematic diagram of the locking mechanism of the present invention installed on the locking seat;

[0042] Figure 7 This is a schematic diagram of the annular centrifuge seat of the present invention;

[0043] Figure 8 for Figure 7 Enlarged view of number A.

[0044] In the diagram: 1. Feeding section; 2. Sorting section; 3. Channel; 11. Central cylinder; 12. Rotary shaft mounting sleeve; 13. Inner mounting rod; 14. Outer fixing ring; 15. Outer mounting rod; 16. Grading blade one; 21. Annular rotating frame; 22. Grading plate assembly; 23. Fan-shaped support frame; 24. Grading plate; 25. Card seat; 26. Side mounting slot; 27. Card post; 28. Locking seat; 29. ​​Locking chamber; 20. Locking plate; 31. Locking rod; 32. 33. Mounting hole; 34. Double-ended screw; 35. Slider; 36. Supporting connecting rod; 37. Locking mechanism; 38. Side mounting chamber; 39. Locking plate; 30. Liquid inlet chamber; 41. Liquid inlet channel; 42. Vertical lever; 43. Top rod; 44. Guide rod one; 45. Liquid inlet plate; 46. Blocking plate; 47. Return spring; 48. Annular centrifuge seat; 49. Liquid storage chamber; 40. Plug plate; 51. Centrifuge rod; 52. Centrifuge ball; 53. Flipping rod; 54. Guide rod two. Detailed Implementation

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

[0046] Example

[0047] The present invention will now be further described with reference to the accompanying drawings.

[0048] like Figures 1 to 8 As shown, this embodiment provides a multi-channel hollow, spreading, and grading rotating drum, which includes: multiple material dropping sections 1 and sorting sections 2 arranged sequentially from the inside to the outside, and each of the material dropping section 1 and sorting section 2 is equipped with an independent channel 3 above it;

[0049] The sorting section 2 includes an annular rotating frame 21 composed of multiple grading sheet components 22. The annular rotating frame 21 is located outside the outermost unloading section 1, and an independent channel 3 is provided above the annular rotating frame 21.

[0050] The working principle and beneficial effects of the above technical solution are as follows:

[0051] This invention discloses a multi-channel hollow, spreading, and grading rotary drum, comprising multiple material dropping sections 1 and sorting sections 2 arranged sequentially from the inside out, with each material dropping section 1 and sorting section 2 equipped with an independent channel 3 above it. (Refer to...) Figure 1 As shown, the channel 3 connected to the innermost material feeding section 1 is a cylindrical structure. Then, the cross-section of the channel 3 connected to other material feeding sections 1 arranged from the inside out is a ring structure arranged concentrically from the inside out. Similarly, the cross-section of the channel 3 connected to the sorting section 2 is also a ring structure, and it is concentrically arranged with the channel 3 connected to the outermost material feeding section 1. Each channel 3 is set independently. This invention provides a multi-channel hollow, spreading, and grading rotating drum. When the drum rotates, grading and feeding occur in each channel 3 connected to the feeding section 1. The number of feeding sections 1 can be set to 2, 3, 4 or more, progressively from the inside out, depending on the sorting requirements. In this embodiment, the number of feeding sections 1 is 2. Coarse powder falling from the innermost feeding section 1 through an independent channel 3 falls, while medium powder falling from the outermost feeding section 1 through an independent channel 3 is lifted by the rotation of the annular rotating frame 21 and collides with the grading plate assembly 22. The medium powder falls down, while the fine powder passes through the grading plate assembly 22 and is sent into an independent channel 3 connected to the sorting section 2. In this way, multi-level sorting can be achieved in a targeted manner, improving sorting efficiency and reducing sorting energy consumption.

[0052] In one embodiment, the material feeding section 1 includes:

[0053] Center tube 11;

[0054] A rotating shaft mounting sleeve 12 is located inside the central cylinder 11. An inner material discharge channel is formed between the rotating shaft mounting sleeve 12 and the central cylinder 11. An independent channel 3 is provided above the inner material discharge channel.

[0055] An inner mounting rod 13 is provided, and multiple inner mounting rods 13 are arranged in a circular array between the central cylinder 11 and the rotating shaft mounting sleeve 12.

[0056] The working principle and beneficial effects of the above technical solution are as follows:

[0057] The rotating shaft mounting sleeve 12 is used to install the central rotating shaft. When the central rotating shaft rotates, it drives the rotating shaft mounting sleeve 12 and the central cylinder 11 connected to the rotating shaft mounting sleeve 12 through the inner mounting rod 13 to rotate. The inner material discharge channel formed between the rotating shaft mounting sleeve 12 and the central cylinder 11 is equivalent to the innermost material discharge section 1. When the coarse powder falls from the inner material discharge channel after passing through the independent channel 3, the inner mounting rod 13 collides with the coarse powder during the rotation process, which is equivalent to crushing the coarse powder. The medium powder generated after the coarse powder is crushed diffuses to the outer level.

[0058] In one embodiment, the material feeding section 1 further includes:

[0059] The outer fixing ring 14, the central cylinder 11 is located inside the outer fixing ring 14, the outer material discharge channel is formed between the central cylinder 11 and the outer fixing ring 14, an independent channel 3 is provided above the outer material discharge channel, and the annular rotating frame 21 is installed on the outer ring of the outer fixing ring 14.

[0060] External mounting rods 15, a plurality of external mounting rods 15 are arranged in a circular array between the outer fixing ring 14 and the central cylinder 11.

[0061] The working principle and beneficial effects of the above technical solution are as follows:

[0062] The outer material discharge channel formed between the central cylinder 11 and the outer fixing ring 14 is equivalent to the outermost material discharge section 1. When the medium powder falls from the outer material discharge channel after passing through the independent channel 3, the outer mounting rod 15 collides with the medium powder during its rotation, which is equivalent to crushing the medium powder. The fine powder generated after the medium powder is crushed diffuses to the sorting section 2.

[0063] In one embodiment, a plurality of grading blades 16 are circumferentially mounted at the bottom end of the central cylinder 11, and the grading blades 16 are located below the outer discharge channel.

[0064] The working principle and beneficial effects of the above technical solution are as follows:

[0065] When the medium powder falls from the outer discharge channel after passing through the independent channel 3, it collides with the medium powder during the rotation of the outer mounting rod 15, which is equivalent to crushing the medium powder. The fine powder produced after the medium powder is crushed can improve the diffusion effect of the fine powder during the rotation of the grading blade 16.

[0066] In one embodiment, adjacent grading sheet assemblies 22 are connected by fixing bolts, the grading sheet assembly 22 comprising:

[0067] Fan-shaped support frame 23;

[0068] Five graded pieces 24 are evenly distributed within the fan-shaped support frame 23.

[0069] The working principle and beneficial effects of the above technical solution are as follows:

[0070] The five graded pieces 24 are installed at equal intervals in the fan-shaped support frame 23. The adjacent fan-shaped support frames 23 are detachably installed by fixing bolts to form a ring frame 21, thereby facilitating the splicing of adjacent graded piece assemblies 22.

[0071] In one example, multiple grading blades are circumferentially mounted on the bottom end of the rotating shaft mounting sleeve 12, with the grading blades located below the inner material discharge channel.

[0072] The working principle and beneficial effects of the above technical solution are as follows:

[0073] When the coarse powder falls from the inner feeding channel after passing through the independent channel 3, the inner mounting rod 13 collides with the coarse powder during its rotation, which is equivalent to crushing the coarse powder. The medium powder produced after the coarse powder is crushed can improve the diffusion effect of the medium powder during the rotation of the grading blade 16.

[0074] In one embodiment, the graded chip assembly 22 further includes:

[0075] Card holders 25, an equal number of card holders 24 are installed on the inner ring of the fan-shaped support frame 23 away from the outer fixing ring 14. The card holders 25 are provided with side mounting slots 26. One end of the classifier 24 is equipped with a card post 27 that is locked in the side mounting slot 26. The slot end of the side mounting slot 26 is set in an open-mouth type.

[0076] Locking seats 28, an equal number of which are set with the grading plates 24, are installed on the inner ring of the sector-shaped support frame 23 near the outer fixed ring 14. Locking chamber 29 is located inside the locking seats 28. Locking plate 20 is located inside the locking chamber 29. One end of the locking plate 20 extends out of the locking chamber 29 and is equipped with a locking rod 31. The other end of the grading plate 24 is equipped with a mounting hole 32 that connects to the locking rod 31. Double-ended screw 33 is rotatably installed inside the locking chamber 29. Two sliders 34 are sleeved on the double-ended screw 33 and are respectively connected to the other end of the locking plate 20 through the support connecting rod 35.

[0077] The working principle and beneficial effects of the above technical solution are as follows:

[0078] The grading plate 24 with the retaining post 27 is inserted into the side mounting groove 26 of the mounting base 25. Then, the grading plate 24 rotates on the mounting base 25 around the retaining post 27. The groove opening of the side mounting groove 26 is open to facilitate the rotation of the grading plate 24. The end of the grading plate 24 with the mounting hole 32 is fitted onto the locking rod 31. Then, the double-ended screw 33 is rotated, causing the two sliders 34 fitted onto it to move away from each other, thereby driving the two sliders 34 to move away from each other via the support connecting rod 3. The locking plate 20 connected to 5 and the grading plate 24 installed on the locking plate 20 are sent into the locking chamber 29. At this time, the end of the grading plate 24 with the retaining post 27 is attached to the end of the groove of the side mounting slot 26, so that the two ends of the grading plate 24 can be fixed. The double-ended screw 33 has two threads with opposite directions of rotation. The two sliders 34 are respectively installed on the two threads with opposite directions of rotation. The double-ended screw 33 is equipped with an internal hexagon rotating head for easy rotation, so that the double-ended screw 33 can be rotated by a tool.

[0079] In one embodiment, the graded chip assembly 22 further includes:

[0080] The locking mechanism 36 is embedded in the locking seat 28 and extends into the locking chamber 29. The locking mechanism 36 includes a side mounting chamber 37 opened on the inner wall of the locking chamber 29, a locking plate 38 sealing the side mounting chamber 37 near the end of the locking chamber 29, and a liquid inlet chamber 39 located in the locking seat 28 and connected to the side mounting chamber 37.

[0081] A centrifugal drive mechanism is installed at the bottom of the outer fixing ring 14 and is connected to the liquid inlet chamber 39 through the liquid inlet channel 30.

[0082] The working principle and beneficial effects of the above technical solution are as follows:

[0083] When the central shaft drives the rotating cage to rotate, the outer fixing ring 14 rotates synchronously. The centrifugal drive mechanism installed at the bottom of the outer fixing ring 14 rotates. The centrifugal drive mechanism sends the oil inside into the inlet chamber 39 of the locking seat 28 through the inlet channel 30. The oil is sent into the side mounting chamber 37 connected to the inlet chamber 39. After the pressure in the side mounting chamber 37 increases, it drives the locking plate 38 to abut against the classifying plate 24 that extends into the locking chamber 29, thereby stabilizing the classifying plate 24. Moreover, the faster the central shaft drives the rotating cage to rotate, the greater the centrifugal force of the centrifugal drive mechanism, the greater the pressure in the side mounting chamber 37, and the greater the force of the locking plate 38 against the classifying plate 24, thus strengthening the stabilizing effect on the classifying plate 24.

[0084] In one embodiment, the locking mechanism 36 further includes:

[0085] Vertical lever 41, which is rotatably mounted on the side of locking seat 28 via mounting bracket;

[0086] Top rod 42, one end of which is connected to vertical lever 41, and the other end of which extends into side mounting chamber 37 and abuts against the movable end of locking plate 38;

[0087] Guide rod 43, one end of which is connected to the end of the vertical lever 41 away from the top rod 42, and the other end of which extends into the liquid inlet chamber 39;

[0088] The liquid inlet plate 44 is installed in the liquid inlet chamber 39 and divides the liquid inlet chamber 39 into two independent chambers. The liquid inlet channel 30 is connected to the chamber near the side mounting chamber 37. The liquid inlet plate 44 is provided with a liquid inlet hole.

[0089] A blocking plate 45 is located in the cavity away from the side mounting chamber 37 and is configured to block the liquid inlet plate 44. The other end of the guide rod 43 is installed on the blocking plate 45. A reset spring 46 is sleeved on the guide rod 43 and abuts against the inner wall of the blocking plate 45 and the liquid inlet chamber 39.

[0090] The working principle and beneficial effects of the above technical solution are as follows:

[0091] When the central rotating shaft drives the rotating cage to rotate, the outer fixed ring 14 rotates synchronously. The centrifugal drive mechanism installed at the bottom of the outer fixed ring 14 rotates. The centrifugal drive mechanism sends the oil inside into the inlet chamber 39 of the locking seat 28 through the inlet channel 30. When the oil is sent into the side mounting chamber 37 connected to the inlet chamber 39, the pressure in the inlet chamber 39 increases. The oil is sent from the inlet hole on the inlet plate 44 into the chamber away from the side mounting chamber 37. The return spring 46 is compressed by force. The blocking plate 45 drives the top rod 42 and the vertical lever 41 connected to the top rod 42 to flip on the mounting frame. The vertical lever 41 drives the guide rod 43 to extend into the side mounting chamber 37 and abut against the locking plate 38, thereby making the locking plate 38 further abut against the classifier plate 24.

[0092] In one embodiment, the centrifugal drive mechanism includes:

[0093] An annular centrifuge seat 47 is installed at the bottom of the outer fixing ring 14. Five liquid storage chambers 48 are circumferentially distributed in the annular centrifuge seat 47 and store oil. The liquid inlet channel 30 is connected to the liquid storage chambers 48.

[0094] Stopper plate 49, which is located inside liquid storage chamber 48;

[0095] Five centrifugal rods 40 are circumferentially mounted on the bottom end of an annular centrifugal base 47, and centrifugal balls 51 are mounted on the centrifugal rods 40.

[0096] The flipping rod 52 is bent at an obtuse angle and is rotatably mounted on the side of the annular centrifuge seat 47 via a mounting bracket 2. One end of the flipping rod 52 is connected to the centrifuge rod 40, and the other end of the flipping rod 52 is connected to a guide rod 2 53. The end of the guide rod 2 53 away from the flipping rod 52 extends into the liquid storage chamber 48 and is connected to the stopper plate 49.

[0097] The working principle and beneficial effects of the above technical solution are as follows:

[0098] When the central rotating shaft drives the rotating cage to rotate, the outer fixed ring 14 rotates synchronously. The annular centrifugal seat 47 installed at the bottom of the outer fixed ring 14 rotates. The annular centrifugal seat 47 drives the centrifugal rod 40 located below it to rotate. Under the centrifugal force of the centrifugal ball 51, the centrifugal rod 40 is lifted and drives the flipping rod 52 to flip on the mounting frame 2. The flipping rod 52 drives the guide rod 2 53 connected to it to extend into the liquid storage chamber 48. The plug plate 49 located in the liquid storage chamber 48, driven by the guide rod 2 53, sends the oil in the liquid storage chamber 48 from the liquid inlet channel 30 into the liquid inlet chamber 39 of the locking seat 28. In this way, the locking plate 38 can be abutted.

[0099] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A multi-channel hollow, spreading, and grading rotary drum, characterized in that, include: Multiple material dropping sections (1) and sorting sections (2) are arranged in a progressive manner from the inside out, and each material dropping section (1) and sorting section (2) is equipped with an independent channel (3) above it; Among them, the sorting section (2) includes an annular rotating frame (21) composed of multiple graded sheet components (22). The annular rotating frame (21) is located outside the outermost material dropping section (1). An independent channel (3) is provided above the annular rotating frame (21). The material feeding section (1) includes: A central cylinder (11), a rotating shaft mounting sleeve (12) located inside the central cylinder (11), an inner material discharge channel formed between the rotating shaft mounting sleeve (12) and the central cylinder (11), an independent channel (3) above the inner material discharge channel, and multiple inner mounting rods (13) arranged in a circular array between the central cylinder (11) and the rotating shaft mounting sleeve (12); The material discharge section (1) further includes: an outer fixing ring (14), a central cylinder (11) located inside the outer fixing ring (14), an outer material discharge channel formed between the central cylinder (11) and the outer fixing ring (14), an independent channel (3) above the outer material discharge channel, an annular rotating frame (21) installed on the outer ring of the outer fixing ring (14), and multiple outer mounting rods (15) arranged in a circular array between the outer fixing ring (14) and the central cylinder (11); Adjacent grading plate assemblies (22) are connected by fixing bolts. The grading plate assembly (22) includes: a fan-shaped support frame (23), and five grading plates (24) are evenly distributed in the fan-shaped support frame (23); The grading plate assembly (22) further includes: a retainer (25) installed on the inner ring of the sector support frame (23) away from the outer fixed ring (14) and a locking seat (28) installed on the inner ring of the sector support frame (23) near the outer fixed ring (14). The retainer (25) has a side mounting groove (26). One end of the grading plate (24) is fitted with a locking post (27) that is engaged in the side mounting groove (26). The locking chamber (29) is located inside the locking seat (28). The locking plate (20) is located inside the locking chamber (29). One end of the locking plate (20) extends out of the locking chamber (29) and is equipped with a locking rod (31). The other end of the grader plate (24) is equipped with a mounting hole (32) that connects to the locking rod (31). The double-ended screw (33) is rotatably installed inside the locking chamber (29). Two sliders (34) are sleeved on the double-ended screw (33) and are respectively connected to the other end of the locking plate (20) through the support connecting rod (35). The grading plate assembly (22) further includes: a locking mechanism (36) embedded in the locking seat (28), the locking mechanism (36) extending into the locking chamber (29), the locking mechanism (36) including a side mounting chamber (37) opened on the inner wall of the locking chamber (29), a locking plate (38) sealing the side mounting chamber (37) near the end of the locking chamber (29), the liquid inlet chamber (39) located in the locking seat (28) and connected to the side mounting chamber (37), and a centrifugal drive mechanism installed at the bottom end of the outer fixing ring (14) and connected to the liquid inlet chamber (39) through the liquid inlet channel (30); The locking mechanism (36) further includes: a vertical lever (41) rotatably mounted on the side of the locking seat (28) via a mounting bracket; one end of a push rod (42) is connected to the vertical lever (41); the other end of the push rod (42) extends into the side mounting chamber (37) and abuts against the movable end of the locking plate (38); one end of a guide rod (43) is connected to the end of the vertical lever (41) away from the push rod (42); the other end of the guide rod (43) extends into the liquid inlet chamber (39); the liquid inlet plate (44) is installed in the liquid inlet chamber (39) and divides the liquid inlet chamber (39) into two independent chambers; the blocking plate (45) is located in the chamber away from the side mounting chamber (37); the other end of the guide rod (43) is installed on the blocking plate (45); and the return spring (46) is sleeved on the guide rod (43). The centrifugal drive mechanism includes: an annular centrifugal seat (47) installed at the bottom of the outer fixed ring (14), five liquid storage chambers (48) circumferentially distributed in the annular centrifugal seat (47) and storing oil, an inlet channel (30) connected to the liquid storage chamber (48), a stopper plate (49) located in the liquid storage chamber (48), five centrifugal rods (40) circumferentially installed at the bottom of the annular centrifugal seat (47), centrifugal balls (51) installed on the centrifugal rods (40), a flipping rod (52) bent at an obtuse angle, the flipping rod (52) is rotatably installed on the side of the annular centrifugal seat (47) through a mounting bracket, one end of the flipping rod (52) is connected to the centrifugal rod (40), the other end of the flipping rod (52) is connected to a guide rod (53), the end of the guide rod (53) away from the flipping rod (52) extends into the liquid storage chamber (48) and is connected to the stopper plate (49); When the central rotating shaft drives the rotating cage to rotate, the outer fixed ring (14) rotates synchronously. The centrifugal drive mechanism installed at the bottom of the outer fixed ring (14) rotates, and the centrifugal drive mechanism sends the oil inside into the inlet chamber (39) of the locking seat (28) through the inlet channel (30).

2. The multi-channel hollow, spreading, and grading rotary drum according to claim 1, characterized in that, Multiple grading blades (16) are circumferentially installed at the bottom of the central cylinder (11), with the grading blades (16) located below the outer material discharge channel.

3. The multi-channel hollow, spreading, and grading rotary drum according to claim 1, characterized in that, Multiple grading blades are circumferentially installed at the bottom of the rotating shaft mounting sleeve (12), with the second grading blade located below the inner material discharge channel.

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