fluidized bed

Abstract

This application relates to the field of sand dust removal technology and discloses a fluidized bed. The fluidized bed has a chamber in its outer shell, with an inlet and an outlet at opposite ends along a first direction, the inlet being higher than the outlet along a third direction. A fish-scale plate is disposed within the chamber, having a first end and a second end opposite to each other along the first direction, the first end being higher than the second end along the third direction and closer to the inlet along the first direction, the second end being closer to the outlet along the first direction, thus dividing the chamber into a first cavity and a second cavity along the third direction, the first cavity being higher than the second cavity along the third direction. A collecting cylinder is disposed within the first cavity, with a notch on its circumference, allowing the collecting cylinder to rotate circumferentially and move along the third direction. This application enables uniform sand thickness distributed on the fish-scale plate during the removal of micro-dust from quartz sand, reducing the quartz powder content in the quartz sand from 3% to 0.5%, thereby ensuring the performance and quality of the sand.

Description

Technical Field

[0001] This application relates to the field of sand dust removal technology, specifically to fluidized bed. Background Technology

[0002] In the foundry industry, artificial silica sand is a fundamental material widely used in mold making and molding sand production. Its quality directly affects the precision and surface finish of castings. Dry manufacturing processes reduce the powder content of artificial silica sand by treating the silica sand particles in a drying environment. Reducing the powder content decreases the specific surface area of ​​the silica sand, allowing for a reduction in the amount of binder added during molding, thereby increasing the strength of the sand mold, lowering costs, reducing gas generation in the sand mold, and minimizing casting defects.

[0003] In existing technologies, fluidized bed dust removal is commonly used for artificial silica sand. Fluidized bed equipment introduces airflow from the bottom, causing the silica sand particles to boil within the bed. The movement of the gas-solid two-phase flow separates the light dust from the silica sand. This dust removal method typically includes a fish-scale plate for uniformly distributing the airflow, and dust collection and discharge are achieved by adjusting the airflow velocity and bed height. Existing fluidized bed structures are mostly fixed designs, and operation relies on empirical parameters to complete the basic dust removal process.

[0004] However, this existing technology has revealed significant limitations in actual operation. When the sand is dropped and distributed on the fish-scale plate, uneven distribution can easily lead to localized accumulation during the dust removal process, resulting in incomplete dust removal and affecting the performance and quality of the sand. Summary of the Invention

[0005] This application provides a fluidized bed to solve the problem of incomplete dust removal caused by localized accumulation during the dust removal process, which affects the performance and quality of the sand.

[0006] This application provides a fluidized bed having three intersecting directions: a first direction, a second direction, and a third direction, including:

[0007] The outer shell has a cavity, and the outer shell has an inlet end and an outlet end at its two ends along the first direction, and the inlet end is higher than the outlet end along the third direction.

[0008] A fish-scale plate is disposed in the cavity. The fish-scale plate has a first end and a second end opposite to each other along the first direction. The first end is higher than the second end along the third direction. The first end is close to the feed end along the first direction, and the second end is close to the discharge end along the first direction. The circumferential surface of the fish-scale plate is adapted to the inner wall of the cavity and divides the cavity into a first cavity and a second cavity along the third direction. The first cavity is higher than the second cavity along the third direction.

[0009] A collection cylinder is disposed in the first cavity. The circumferential surface of the collection cylinder is provided with a notch. The collection cylinder can rotate in its circumferential direction and move in the third direction.

[0010] A dust collector is provided at the discharge end, and the dust collector is connected to the first cavity;

[0011] The feed box is connected to the feed end.

[0012] In one optional embodiment, the circumferential surface of the collecting cylinder is provided with a first region, a second region and a third region, which are connected end to end in sequence. The first region is the notch, the third region is provided with a sieve hole, and the second region is used to store sand that enters the collecting cylinder through the notch.

[0013] In one alternative implementation, it further includes:

[0014] The frame is disposed within the first cavity;

[0015] A sliding seat is disposed within the frame and slides with the frame; the sliding seat is connected to the collecting cylinder.

[0016] A screw is disposed within the frame and extends along the first direction. One end of the screw along the first direction is rotatably connected to the frame. The screw passes through the sliding seat and is threadedly connected to the sliding seat.

[0017] A displacement motor is disposed within the frame, and the output end of the displacement motor is connected to the other end of the screw.

[0018] A cylinder is disposed on the outer wall of the housing, and the output end of the cylinder passes through the housing and is connected to the frame, so that the frame moves closer to or further away from the fish scale plate along the third direction.

[0019] In one alternative implementation, it further includes:

[0020] A fixing plate is disposed on the side of the sliding seat facing the fish scale plate along the third direction;

[0021] A pair of rotating seats are respectively provided with the two ends of the fixing plate along the second direction, and the collecting cylinder is located between the pair of rotating seats;

[0022] A pair of rotating cylinders are respectively disposed at both ends of the collecting cylinder along the second direction, and the inner cavity of the rotating cylinder is configured as a rectangular cavity;

[0023] A pair of rotating shafts are provided with a rotating end and a sliding end. The sliding ends of the pair of rotating shafts are respectively located in the rectangular cavities of the pair of rotating cylinders. The sliding ends are configured with rectangular cross sections and slide in cooperation with the rectangular cavities. The rotating ends of the pair of rotating shafts are respectively rotatably connected to the pair of rotating seats.

[0024] A rotating motor is mounted on one of the rotating seats, and the output end of the rotating motor is connected to the rotating end of one of the rotating shafts.

[0025] In one alternative implementation, it further includes:

[0026] A first spring is sleeved on the outside of the rotating shaft and the rotating cylinder. One end of the first spring abuts against the rotating seat, and the other end of the first spring abuts against the collecting cylinder.

[0027] The material screening motor is mounted on the fixed plate.

[0028] A cam is located between the collecting cylinder and the rotating seat. The output end of the screening motor passes through the fixed plate and is connected to the cam. The cam abuts against the end face of the collecting cylinder.

[0029] In one alternative implementation, it further includes:

[0030] The feeding motor is connected to the inner wall of the second cavity;

[0031] A material-impacting shaft is disposed within the second cavity and extends along the second direction. One end of the material-impacting shaft is connected to the output end of the material-impacting motor, and the other end of the material-impacting shaft is rotatably connected to the inner wall of the second cavity.

[0032] Multiple extension rods are provided, and the multiple extension rods are connected to the circumferential surface of the material-impacting shaft;

[0033] The second spring is connected to the end of the extension rod away from the material-impacting shaft;

[0034] The rubber ball is connected to the second spring and abuts against the fish scale plate.

[0035] In one alternative implementation, it further includes:

[0036] The frame is connected to the outer casing;

[0037] A first dust removal fan is installed inside the frame, and the output end of the first dust removal fan is connected to the second cavity.

[0038] In one alternative implementation, it further includes:

[0039] A cylindrical body is disposed on the outer shell and communicates with the first cavity;

[0040] A filter cartridge is disposed on the outside of the outer shell. The inner wall of the filter cartridge is connected to the outer wall of the cartridge body by a thread. The end face of the filter cartridge is provided with a first filter hole.

[0041] In one alternative implementation, it further includes:

[0042] A stirring motor is mounted on the dust collection box;

[0043] A stirring shaft is installed inside the dust collection box, and the output end of the stirring motor is connected to the stirring shaft;

[0044] Multiple stirring rods are provided and connected to the outer wall of the stirring shaft;

[0045] The discharge cylinder is connected to the dust collector, and the discharge cylinder and the stirring motor are arranged opposite to each other along the third direction. The discharge cylinder is lower than the stirring motor along the third direction.

[0046] The second dust removal fan is installed inside the frame. The output end of the second dust removal fan is connected to the discharge cylinder. The dust removal box is provided with multiple second filter holes.

[0047] In one alternative implementation, it further includes:

[0048] The sealing plate is configured as a disc-shaped structure, and the circumferential surface of the sealing plate is configured as an arc-shaped structure, which is adapted to the curvature of the inner wall of the discharge cylinder;

[0049] The drive rod passes through the discharge cylinder and connects to the circumference of the sealing plate.

[0050] Beneficial effects: By incorporating a collection cylinder with circumferential openings that can rotate circumferentially and move in three directions, this design actively receives and temporarily stores sand from thicker areas on the fish-scale plate. Its movement collects initially unevenly distributed sand and directs it to areas with less sand on the fish-scale plate, effectively alleviating the problem of uneven sand distribution. Simultaneously, the dynamic movement of the collection cylinder prevents accumulation and direct clogging of the screen holes on the inclined fish-scale plate, ensuring smooth and even distribution of sand, thus improving the uniformity of subsequent dust removal. The final dust collection box performs final dust removal on the sand after initial processing by the fish-scale plate, ensuring product quality stability. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the specific embodiments of this application or 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 this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0052] Figure 1 This is a schematic diagram of the structure of a fluidized bed according to an embodiment of this application;

[0053] Figure 2 This is a schematic diagram of the dust collector in an embodiment of this application;

[0054] Figure 3 This is a schematic diagram of the fish scale plate structure in an embodiment of this application;

[0055] Figure 4 This is a schematic diagram of the internal structure of the outer shell in an embodiment of this application;

[0056] Figure 5 for Figure 4 A magnified view of part A in the diagram;

[0057] Figure 6 This is a schematic diagram of the framework in the embodiments of this application;

[0058] Figure 7 This is a schematic diagram of the structure of the collection tube in an embodiment of this application;

[0059] Figure 8 for Figure 7 A magnified view of part B in the diagram;

[0060] Figure 9 This is a schematic diagram of the sealing plate in an embodiment of this application.

[0061] Explanation of reference numerals in the attached figures:

[0062] 1. Outer shell; 101. First cavity; 102. Second cavity; 2. Fish scale plate; 3. Collection cylinder; 301. Notch; 302. Screen hole; 4. Dust collector; 5. Feed box; 6. Frame; 7. Sliding seat; 8. Screw; 9. Displacement motor; 10. Cylinder; 11. Fixing plate; 12. Rotating seat; 13. Rotating cylinder; 14. Rotating shaft; 15. Rotating motor; 16. First spring; 17. Screening motor; 18. 19. Cam; 20. Feeding motor; 21. Feeding shaft; 22. Extension rod; 23. Second spring; 24. Rubber ball; 25. Frame; 26. First dust removal fan; 27. Cylinder; 28. Filter cartridge; 29. ​​Agitator motor; 30. Agitator shaft; 31. Agitator rod; 32. Discharge cylinder; 33. Sealing plate; 34. Drive rod; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0064] The following is combined Figures 1 to 9 This describes an embodiment of the present application.

[0065] According to an embodiment of this application, a fluidized bed is provided, having intersecting first directions X, second directions Y, and third direction Z, including a shell 1, a fish-scale plate 2, a collecting cylinder 3, a dust collection box 4, and a feeding box 5. The shell 1 is provided with a chamber, and a feeding end and a discharging end are respectively provided at both ends of the shell 1 along the first direction X, with the feeding end being higher than the discharging end along the third direction Z. The fish-scale plate 2 is disposed in the chamber, and the fish-scale plate 2 has a first end and a second end opposite to each other along the first direction X, with the first end being higher than the second end along the third direction Z. The first end is closer to the feeding end along the first direction X, and the second end is closer to the discharging end along the first direction X. The peripheral surface of the fish-scale plate 2 is adapted to the inner wall of the chamber and divides the chamber into a first cavity 101 and a second cavity 102 along the third direction Z, with the first cavity 101 being higher than the second cavity 102 along the third direction Z. A collecting cylinder 3 is disposed within the first cavity 101. A notch 301 is provided on the circumferential surface of the collecting cylinder 3. The collecting cylinder 3 rotates circumferentially and moves in the third direction Z. A dust collector 4 is disposed at the discharge end and communicates with the first cavity 101. A feeding box 5 is communicated with the feeding end.

[0066] It should be noted that a camera capable of recording and transmitting images is installed on the collection cylinder 3. By observing the thickness distribution of the sand on the fish scale plate 2 through the camera, the thicker areas of sand on the fish scale plate 2 can be collected and spread on the thinner areas of sand.

[0067] Understandably, in industrial production and processing, ordinary fluidized bed dust removal is ineffective, and quartz sand or similar granular materials are easily affected by electrostatic adsorption, causing dust and other impurities to adhere to the particle surface, thereby reducing product quality and performance. However, this application can significantly improve dust removal efficiency by adopting specific process parameter settings, including: controlling the airflow velocity in the fluidized bed to 1.2-1.8 m / s, maintaining the operating temperature at 80-120℃, maintaining the system air pressure at 800-1200 Pa, and adjusting the residence time of the sand in the outer shell 1 and dust collection box 4 to 30-60 seconds, so that the quartz powder content in the quartz sand is reduced from 3% to 0.5%, thereby ensuring that the purity and performance of the final product meet high standards.

[0068] In this embodiment, by positioning the feed end above the discharge end in the third direction (Z), and using the inclined fish-scale plate 2 to divide the chamber into an upper first cavity 101 and a lower second cavity 102, a dust removal and cooling path is constructed that facilitates the natural flow of sand by gravity. Furthermore, by providing a collection cylinder 3 with a notch 301 on its circumferential surface that can rotate circumferentially and move in the third direction (Z), this design can actively receive and temporarily store sand falling from the feed end into the thicker areas of the fish-scale plate 2. Its movement collects sand with uneven initial thickness and distributes it to the thinner sand areas on the fish-scale plate 2, effectively alleviating the problem of uneven sand distribution on the fish-scale plate 2. Simultaneously, the dynamic movement of the collection cylinder 3 prevents sand from accumulating on the inclined fish-scale plate 2 and directly clogging the screen holes 302, ensuring smooth and uniform spreading of sand on the fish-scale plate 2, thereby improving the uniformity of subsequent dust removal. The dust collection box 4 at the end performs final dust removal on the sand material after preliminary treatment by the fish scale plate 2, ensuring the stability of product quality.

[0069] In one embodiment, the circumferential surface of the collecting cylinder 3 is provided with a first region, a second region and a third region, which are connected end to end in sequence. The first region is a notch 301, the third region is provided with a screen hole 302, and the second region is used to store the sand material that enters the collecting cylinder 3 through the notch 301.

[0070] It should be noted that by observing the thickness distribution of sand on the fish-scale plate 2 through the camera, when encountering an area with a relatively thick sand layer, the collecting cylinder 3 can move downwards and align the edge of the notch 301 with the top surface of the fish-scale plate 2, driving the collecting cylinder 3 to move along the inclined direction of the fish-scale plate 2. This allows for the collection of sand from the thicker area, which is then rotated at a certain angle and stored in the second area. When the camera observes an area with a thinner sand layer, the collecting cylinder 3 rotates, placing the sand inside in the third area, and then shakes and releases the material, ensuring it is evenly distributed over the thinner sand layer.

[0071] In this embodiment, during the rotation of the collecting cylinder 3, it can periodically receive sand through the notch 301, then transfer the sand into a closed storage area for temporary storage, and finally disperse it through the third area with sieve holes 302.

[0072] In one embodiment, the system further includes a frame 6, a sliding seat 7, a screw 8, a displacement motor 9, and a cylinder 10. The frame 6 is disposed within the first cavity 101. The sliding seat 7 is disposed within the frame 6 and slidably engages with it, and is connected to the collecting cylinder 3. The screw 8 is disposed within the frame 6 and extends along a first direction X, with one end of the screw 8 rotatably connected to the frame 6 along the first direction X. The screw 8 passes through the sliding seat 7 and is threadedly connected to it. The displacement motor 9 is disposed within the frame 6, and its output end is connected to the other end of the screw 8. The cylinder 10 is disposed on the outer wall of the housing 1, and its output end passes through the housing 1 and is connected to the frame 6, causing the frame 6 to move closer to or further away from the fish scale plate 2 along a third direction Z.

[0073] In this embodiment, the coordinated operation of the frame 6, sliding seat 7, screw 8, displacement motor 9, and cylinder 10 provides precise linear movement control for the collecting cylinder 3. The screw 8 drives the collecting cylinder 3 to reciprocate along the first direction X (i.e., the sand flow direction), increasing its range of motion along the first direction X and enabling it to cover a wider area on the fish scale plate 2, thereby achieving more comprehensive sand distribution adjustment and anti-clogging protection. The cylinder 10 can adjust the distance between the collecting cylinder 3 and the fish scale plate 2 in the third direction Z, allowing it to adapt to different working distances, thereby achieving contact between the notch 301 and the fish scale plate 2 to complete the sand collection action, enhancing the adaptability and control precision of the equipment.

[0074] In one embodiment, the system further includes a fixed plate 11, a rotating seat 12, a rotating cylinder 13, a rotating shaft 14, and a rotating motor 15. The fixed plate 11 is disposed on the side of the sliding seat 7 facing the fish-scale plate 2 along the third direction Z. A pair of rotating seats 12 are respectively disposed at both ends of the fixed plate 11 along the second direction Y, and the collecting cylinder 3 is located between the pair of rotating seats 12. A pair of rotating cylinders 13 are respectively disposed at both ends of the collecting cylinder 3 along the second direction Y, and the inner cavity of the rotating cylinder 13 is configured as a rectangular cavity. A pair of rotating shafts 14 are each provided with a rotating end and a sliding end. The sliding ends of the pair of rotating shafts 14 are respectively located within the rectangular cavities of the pair of rotating cylinders 13, and the sliding ends are configured with rectangular cross-sections, slidingly engaging with the rectangular cavities. The rotating ends of the pair of rotating shafts 14 are rotatably connected to the pair of rotating seats 12. The rotating motor 15 is disposed on one of the rotating seats 12, and the output end of the rotating motor 15 is connected to the rotating end of one of the rotating shafts 14.

[0075] In this embodiment, a stable and reliable drive system for the collecting cylinder 3 is constructed by combining the fixed plate 11, the rotating seat 12, the rotating cylinder 13, the rotating shaft 14, and the rotating motor 15. The sliding fit between the sliding end of the rectangular cross-section and the rectangular cavity ensures that the rotational torque can be stably transmitted to the collecting cylinder 3, while allowing the collecting cylinder 3 to still move axially during rotation. This enables the collecting cylinder 3 to reciprocate laterally along the second direction Y, thereby achieving a screening effect and improving the uniformity of sand distribution.

[0076] In one embodiment, the system further includes a first spring 16, a screening motor 17, and a cam 18. The first spring 16 is sleeved on the outside of the rotating shaft 14 and the rotating cylinder 13. One end of the first spring 16 abuts against the rotating seat 12, and the other end of the first spring 16 abuts against the collecting cylinder 3. The screening motor 17 is mounted on the fixed plate 11. The cam 18 is located between the collecting cylinder 3 and the rotating seat 12. The output end of the screening motor 17 passes through the fixed plate 11 and is connected to the cam 18. The cam 18 abuts against the end face of the collecting cylinder 3.

[0077] In this embodiment, the cam 18 periodically abuts against the end face of the collecting cylinder 3, causing the entire collecting cylinder 3 to generate high-frequency, small-amplitude axial vibration under the cooperation of the first spring 16. This vibration can effectively agitate the collecting cylinder 3, thereby shaking off the fine sand adhering to the cylinder wall or clogging the screen holes 302, playing a self-cleaning role, ensuring that the screening efficiency and smoothness of the collecting cylinder 3 are always maintained at a high level, and improving the uniformity of the distribution of sand falling on the thinner sand area on the fish scale plate 2.

[0078] In one embodiment, the system further includes a material-impacting motor 19, a material-impacting shaft 20, an extension rod 21, a second spring 22, and a rubber ball 23. The material-impacting motor 19 is connected to the inner wall of the second cavity 102. The material-impacting shaft 20 is disposed within the second cavity 102, extending along the second direction Y. One end of the material-impacting shaft 20 is connected to the output end of the material-impacting motor 19, and the other end of the material-impacting shaft 20 is rotatably connected to the inner wall of the second cavity 102. Multiple extension rods 21 are provided, and multiple extension rods 21 are connected to the circumferential surface of the material-impacting shaft 20. The second spring 22 is connected to the end of the extension rod 21 away from the material-impacting shaft 20. The rubber ball 23 is connected to the second spring 22 and abuts against the fish-scale plate 2.

[0079] In this embodiment, a material-impacting shaft 20 driven by a material-impacting motor 19 and a rubber ball 23 connected by an extension rod 21 and a second spring 22 are disposed within the second cavity 102. Driven by the shaft, the rubber ball 23 continuously and gently taps the lower surface of the fish-scale plate 2. This dynamic tapping effectively loosens and removes sand particles that are embedded or about to be embedded in the sieve holes 302, while the spring buffer prevents potential damage to the fish-scale plate 2 from rigid impacts. This achieves online, active cleaning of the sieve holes 302 of the fish-scale plate 2.

[0080] In one embodiment, the system further includes a frame 24 and a first dust removal fan 25. The frame 24 is connected to the housing 1. The first dust removal fan 25 is disposed within the frame 24, and the output end of the first dust removal fan 25 communicates with the second cavity 102.

[0081] In this embodiment, the first dust removal fan 25 blows hot air into the second cavity 102. The hot air passes through the screen holes 302 of the fish scale plate 2 and comes into full contact with the falling sand, achieving efficient heat and mass exchange and dust removal effect.

[0082] In one embodiment, the system further includes a cylinder 26 and a filter cylinder 27. The cylinder 26 is disposed on the outer casing 1 and communicates with the first cavity 101. The filter cylinder 27 is disposed on the outer side of the outer casing 1, and the inner wall of the filter cylinder 27 is threadedly connected to the outer wall of the cylinder 26. The end face of the filter cylinder 27 is provided with a first filter hole.

[0083] Optionally, the filter cartridge 27 can also be connected to a negative pressure system, wherein the first filter hole provided on the end face of the filter cartridge 27 is connected to the negative pressure system, thereby further improving the dust removal effect in conjunction with the first dust removal fan 25.

[0084] In this embodiment, the cylinder 26 and the filter cylinder 27 are connected by threads, and a first filter hole is provided on the end face of the filter cylinder 27 to provide a filtration device for the exhaust of the first cavity 101. The threaded connection makes it convenient to disassemble, clean, or replace the filter cylinder 27, simplifying the daily maintenance of the equipment.

[0085] In one embodiment, the system further includes a stirring motor 28, a stirring shaft 29, stirring rods 30, a discharge cylinder 31, and a second dust collector 32. The stirring motor 28 is mounted on the dust collector 4. The stirring shaft 29 is located inside the dust collector 4, and the output end of the stirring motor 28 is connected to the stirring shaft 29. Multiple stirring rods 30 are provided and connected to the outer wall of the stirring shaft 29. The discharge cylinder 31 is connected to the dust collector 4, and is positioned opposite to the stirring motor 28 along the third direction Z, with the discharge cylinder 31 being lower than the stirring motor 28 along the third direction Z. The second dust collector 32 is located inside the frame 24, and its output end communicates with the discharge cylinder 31. The dust collector 4 has multiple second filter holes.

[0086] In this embodiment, the stirring mechanism forcibly agitates the sand entering the dust collection box 4, ensuring thorough dust removal without any blind spots. The second filter hole on the dust collection box 4 ensures that the airflow carrying fine dust can be smoothly discharged from the box.

[0087] In one embodiment, the device further includes a sealing plate 33 and a drive rod 34. The sealing plate 33 is configured as a disc-shaped structure, and its circumferential surface is configured as an arc shape, which is adapted to the curvature of the inner wall of the discharge cylinder 31. The drive rod 34 passes through the discharge cylinder 31 and is connected to the circumferential surface of the sealing plate 33.

[0088] In this embodiment, adjustable sealing of the outlet of the discharge cylinder 31 is achieved through the arc-shaped circumferential sealing plate 33 and the drive rod 34 connected thereto. By adjusting the position of the sealing plate 33 inside the discharge cylinder 31 by the drive rod 34, the opening of the discharge port can be controlled or even completely closed. This allows the operator to precisely control the residence time of the sand in the dust collection box 4, enhancing the process control flexibility of the entire equipment.

[0089] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A fluidized bed having a first direction (X), a second direction (Y) and a third direction (Z) intersecting two by two, characterized in that, The utility model relates to a sanding machine, including: A shell (1) is provided with a chamber, and the two ends of the shell (1) along the first direction (X) are provided with a feeding end and a discharging end respectively, and the feeding end is higher than the discharging end along the third direction (Z); A fish scale plate (2) is arranged in the chamber, and the fish scale plate (2) has opposite first and second ends along the first direction (X), the first end is higher than the second end along the third direction (Z), the first end is close to the feeding end along the first direction (X), the second end is close to the discharging end along the first direction (X), the peripheral surface of the fish scale plate (2) is matched with the inner wall of the chamber, and the chamber is divided into a first cavity (101) and a second cavity (102) along the third direction (Z), the first cavity (101) is higher than the second cavity (102) along the third direction (Z); A collecting cylinder (3) is arranged in the first cavity (101), the peripheral surface of the collecting cylinder (3) is provided with a notch (301), the collecting cylinder (3) rotates along the circumferential direction thereof, and the collecting cylinder (3) moves along the third direction (Z); wherein the peripheral surface of the collecting cylinder (3) is provided with a first region, a second region and a third region along the circumferential direction thereof, the first region, the second region and the third region are sequentially connected end to end, the first region is the notch (301), the third region is provided with a sieve hole (302), and the second region is used for storing sand material entering the collecting cylinder (3) through the notch (301); A dust removal box (4) is arranged at the discharging end, and the dust removal box (4) is communicated with the first cavity (101); A feeding box (5) is communicated with the feeding end; A frame (6) is arranged in the first cavity (101); A sliding seat (7) is arranged in the frame (6) and is in sliding fit with the frame (6), and the sliding seat (7) is connected with the collecting cylinder (3); A fixed plate (11) is arranged on one side of the sliding seat (7) facing the fish scale plate (2) along the third direction (Z); A pair of rotating seats (12) are arranged at the two ends of the fixed plate (11) along the second direction (Y), and the collecting cylinder (3) is located between the pair of rotating seats (12); A pair of rotating cylinders (13) are arranged at the two ends of the collecting cylinder (3) along the second direction (Y), and the inner cavity of the rotating cylinder (13) is arranged as a rectangular cavity; A pair of rotating shafts (14) are both provided with rotating ends and sliding ends, the sliding ends of the pair of rotating shafts (14) are located in the rectangular cavities of the pair of rotating cylinders (13) respectively, the sliding ends are arranged as rectangular sections and are in sliding fit with the rectangular cavities, and the rotating ends of the pair of rotating shafts (14) are rotatably connected with the pair of rotating seats (12) respectively; A rotating motor (15) is arranged on one of the rotating seats (12), and the output end of the rotating motor (15) is connected with the rotating end of one of the rotating shafts (14).

2. The fluidized bed according to claim 1, characterized in that Further including: A screw rod (8) is arranged in the frame (6) and extends along the first direction (X), one end of the screw rod (8) is rotatably connected with the frame (6) along the first direction (X), the screw rod (8) penetrates the sliding seat (7) and is threadedly connected with the sliding seat (7); A displacement motor (9) is arranged in the frame (6), and an output end of the displacement motor (9) is connected with the other end of the screw rod (8); A cylinder (10) is arranged on the outer wall of the shell (1), an output end of the cylinder (10) penetrates the shell (1) and is connected with the frame (6), so that the frame (6) is close to or away from the fish scale plate (2) along the third direction (Z).

3. The fluidized bed according to claim 2, characterized in that Further comprising: A first spring (16) is sleeved on the outer side of the rotating shaft (14) and the rotating cylinder (13), one end of the first spring (16) abuts against the rotating seat (12), and the other end of the first spring (16) abuts against the collecting cylinder (3); A screening motor (17) is arranged on the fixed plate (11); A cam (18) is located between the collecting cylinder (3) and the rotating seat (12), an output end of the screening motor (17) penetrates the fixed plate (11) and is connected with the cam (18), and the cam (18) abuts against the end face of the collecting cylinder (3).

4. The fluidized bed according to claim 1, characterized in that Further comprising: A knocking motor (19) is connected with the inner wall of the second cavity (102); A knocking rotating shaft (20) is arranged in the second cavity (102) and extends along the second direction (Y), one end of the knocking rotating shaft (20) is connected with the output end of the knocking motor (19), and the other end of the knocking rotating shaft (20) is rotatably connected with the inner wall of the second cavity (102); A plurality of extension rods (21) are arranged and connected with the peripheral surface of the knocking rotating shaft (20); A second spring (22) is connected with one end of the extension rod (21) away from the knocking rotating shaft (20); A rubber ball (23) is connected with the second spring (22) and abuts against the fish scale plate (2).

5. The fluidized bed according to claim 1, characterized in that Further comprising: A rack (24) is connected with the shell (1); A first dust removal fan (25) is arranged in the rack (24), and an output end of the first dust removal fan (25) is in communication with the second cavity (102).

6. The fluidized bed according to claim 1, characterized in that Further comprising: A cylinder body (26) is arranged on the shell (1) and is in communication with the first cavity (101); A filter cylinder (27) is arranged on the outer side of the shell (1), the inner wall of the filter cylinder (27) is threadedly connected with the outer wall of the cylinder body (26), and the end face of the filter cylinder (27) is provided with a first filter hole.

7. The fluidized bed according to claim 5, characterized in that Further comprising: A stirring motor (28) is arranged on the dust removal box (4); A stirring rotating shaft (29) is arranged in the dust removal box (4), and an output end of the stirring motor (28) is connected with the stirring rotating shaft (29); A plurality of stirring rods (30) are arranged and connected with the outer wall of the stirring rotating shaft (29). An outlet cylinder (31) is connected with the dust removal box (4), the outlet cylinder (31) is arranged opposite to the stirring motor (28) along the third direction (Z), and the outlet cylinder (31) is lower than the stirring motor (28) along the third direction (Z); A second dust removal fan (32) is arranged in the machine frame (24), an output end of the second dust removal fan (32) is communicated with the outlet cylinder (31), and a plurality of second filtering holes are arranged on the dust removal box (4).

8. The fluidized bed according to claim 7, characterized in that Further comprising: A blocking plate (33) is arranged in a disc shape, a circumferential surface of the blocking plate (33) is arranged in an arc shape and is matched with the inner wall arc of the outlet cylinder (31); A driving rod (34) penetrates the outlet cylinder (31) and is connected with the circumferential surface of the blocking plate (33).

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