An ultra-large particle removal device

Abstract

The application relates to the technical field of material screening, and discloses an ultra-particle-size particle removing device which comprises a support frame, a screen is arranged on the inner side of the support frame, a vibration screen mechanism, a pressing assembly, a buffer assembly and a cleaning assembly are arranged on the inner side of the support frame, the screen is installed on the vibration screen mechanism, the vibration screen mechanism comprises a longitudinal screen assembly and a transverse screen assembly, the longitudinal screen assembly comprises two transmission columns and two guide columns, the upper and lower ends of the transmission columns are rotationally connected to the inner side of the support frame, a belt pulley is fixedly connected to the top end of each transmission column, and a belt is arranged on the outer peripheries of the two belt pulleys. The vibration screen mechanism comprising the longitudinal screen assembly and the transverse screen assembly is arranged, the screen is subjected to composite vibration in the vertical and horizontal dimensions, the longitudinal screen assembly drives the screen to reciprocate up and down through a motor driving screw transmission structure, and the material is rapidly layered, so that the screen penetration rate is improved.

Description

Technical Field

[0001] This invention relates to the field of material screening technology, and in particular to a device for removing ultra-large particles. Background Technology

[0002] In numerous industrial sectors, including mineral processing, building materials, chemical production, and food and pharmaceuticals, the screening and grading of particulate materials is a crucial fundamental process. Especially in refined manufacturing processes, the efficient and thorough removal or separation of oversized particles from products or raw materials directly impacts the quality of the final product, the stable operation of subsequent processing equipment, and even the overall economic efficiency of the production process. Traditional screening technologies, such as fixed screens, reciprocating screens, and vibrating screens, have long been the primary means of removing oversized particles. However, with the increasing demands for screening accuracy and processing capacity in industry, and the increasing complexity of material properties (such as high moisture content and easy adhesion), existing screening technologies are facing significant challenges in efficiently removing oversized particles.

[0003] Most existing oversized particle removal devices use single-dimensional vibration or simple mechanical reciprocating motion to drive the material movement on the screen surface. For example, common inclined vibrating screens mainly rely on the excitation force generated by the vibrator at a fixed frequency and direction to make the screen mesh move in an approximately circular or linear trajectory. Although this single vibration mode can achieve preliminary classification, when processing some oversized particles with strong adhesion or irregular shape, the material is prone to agglomeration, slippage, or a single movement trajectory on the screen surface. In addition, in order to maintain screening efficiency, the screen mesh is usually fixed to the frame with rigid or semi-rigid connections. Although this results in high vibration energy transmission efficiency, high stress concentration is prone to occur at the connection points during long-term operation, leading to large vibration, high noise, and rapid wear of parts, affecting the continuous and stable operation of the equipment.

[0004] In practical industrial applications, the main problems with existing ultra-large particle removal devices are screen clogging and insufficient processing efficiency. When processing slightly moist or electrostatically charged particulate materials, due to the limitations of the excitation force direction in a single vibration mode, fine particles are easily trapped or adhered inside the screen holes, causing a rapid reduction in the effective screening area. Once clogging occurs, the equipment's processing capacity drops sharply, requiring operators to stop the machine for manual cleaning. This not only consumes a significant amount of time and labor costs but also severely impacts the continuity and economy of production. Therefore, this invention provides an ultra-large particle removal device to address the shortcomings of existing technologies. Summary of the Invention

[0005] The purpose of this invention is to provide an ultra-large particle removal device that solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an ultra-large particle removal device, comprising a support frame, wherein a screen, a vibrating screen mechanism, a pressing assembly, a buffer assembly, and a cleaning assembly are arranged on the inner side of the support frame. The screen is mounted on the vibrating screen mechanism, which includes a longitudinal screen assembly and a transverse screen assembly. The longitudinal screen assembly includes two drive columns and two guide columns. The upper and lower ends of the drive columns are rotatably connected to the inner side of the support frame. A pulley is fixedly connected to the top of the drive column, and belts are fitted around the outer circumference of the two pulleys. A first motor is mounted on the top of the support frame, and the output end of the first motor is fixedly connected to the top of one of the drive columns. A thread is provided in the middle of the drive column, and a threaded block is connected to its external thread. The thread in the middle of the drive column is used for the reciprocating movement of the threaded block. The upper and lower ends of the guide columns are fixedly connected to the inner side of the support frame, and a slider is fitted around the outer side of the guide columns.

[0007] Preferably, a damping block is fixedly connected to the same side of the threaded block and the slider, and a connecting rod is fixedly connected to the adjacent sides of the two damping blocks. A sleeve is sleeved on the outside of the connecting rod, and the outer sides of the two sleeves are fixedly connected to the outer side of the screen.

[0008] Preferably, two buffer springs are sleeved on the outside of the connecting rod. One end of the buffer spring is fixedly connected to the outside of the damping block, and the other end of the buffer spring is fixedly connected to the damping block. The sleeve is located in the middle of the two sliding rings.

[0009] Preferably, the transverse screen assembly includes two sets of guide sleeves, the number of which is two, arranged symmetrically at the top and bottom and fixedly connected to the inner top wall of the support frame by a frame. A second motor is installed on the outer frame of one set of guide sleeves, and a transmission rod is fixedly connected to the output end of the second motor. Two half gears are fixedly connected to the outer side of the transmission rod.

[0010] Preferably, each group of guide sleeves is provided with an annular toothed frame in the middle, and two sets of limiting strips are provided on the outer side of the annular toothed frame. Each set of limiting strips consists of two strips, which are respectively provided on the outer two sides of the annular toothed frame. T-shaped grooves are provided on the adjacent sides of the two guide sleeves in each group, and the outer sides of the annular toothed frame and the limiting strips are slidably connected to the inner side of the T-shaped grooves.

[0011] Preferably, the inner upper and lower sides of the annular toothed frame are provided with teeth that mesh with the outer side of the half gear, and the outer sides of the annular toothed frame are fixedly connected with levers. The outer sides of the screen are fixedly connected with two blocks, and the outer side of the lever contacts the outer side of the block.

[0012] Preferably, the clamping assembly includes four mounting cylinders, which are respectively installed in the holes opened at the four corners of the screen. A telescopic rod is installed on the inner side of the mounting cylinder, one of which is electrically driven. A pressure plate is fixedly connected to the top of the four telescopic rods. A rubber pad is embedded in the bottom groove of the pressure plate, and the bottom of the rubber pad is in contact with the top of the screen.

[0013] Preferably, the buffer assembly includes four limiting pads and four mounting seats. The four limiting pads are respectively disposed at the four corners of the inner bottom wall of the support frame. A damping spring is hinged to the top of each limiting pad. The four mounting seats are respectively disposed at the four bottom corners of the screen. The top of each damping spring is hinged to the inner side of the mounting seat.

[0014] Preferably, the cleaning assembly includes two electric guide rails, which are installed on the outer sides of the screen. Connecting seats are installed on the movable seats of the electric guide rails, and brush rollers are rotatably connected to the adjacent sides of the two connecting seats.

[0015] Preferably, the outer brush of the brush roller is in contact with the bottom of the screen, and a third motor is installed on the outer side of one of the connecting seats, the output end of the third motor being fixedly connected to one end of the brush roller.

[0016] In summary, the present invention has at least one of the following beneficial technical effects:

[0017] 1. This invention achieves composite vibration of the screen in both vertical and horizontal dimensions by setting up a vibrating screen mechanism that includes a longitudinal screen component and a transverse screen component. The longitudinal screen component uses a motor-driven threaded transmission structure to drive the screen to move up and down reciprocatingly, which promotes rapid stratification of materials and improves the screening rate. The transverse screen component uses the intermittent meshing of a half gear and an annular toothed frame, and uses a lever to strike the stop block to generate a horizontal excitation force on the screen. The composite motion trajectory can not only effectively break up agglomerated particles, but also accelerate the horizontal conveying and discharge of oversized particles on the screen surface, which significantly improves the overall screening efficiency and processing capacity.

[0018] 2. This invention constructs a multi-buffered and flexible fixing system, which effectively improves the operational stability and service life of the equipment. By setting damping blocks and buffer springs at the transmission connection and evenly distributing damping springs at the bottom of the screen, it can fully absorb the high-frequency impact energy generated during vibration and avoid damage to the mechanical structure caused by rigid collisions. At the same time, the pressing component with rubber pads on the top flexibly limits the screen, which not only prevents the screen from shifting during severe operation, but also greatly reduces the noise of the equipment during operation, ensuring reliable operation of the device under high load.

[0019] 3. This invention, by installing an electric guide rail and a rotating brush roller at the bottom of the screen, allows the device to automatically control the brush roller to reciprocate along the bottom of the screen during operation. The rotating bristles can penetrate deep into the screen holes to forcibly remove stuck or adhered particles, ensuring that the screen always maintains the maximum effective screening area. This automated cleaning mechanism avoids efficiency loss due to screen hole blockage, reduces the frequency and cost of manual maintenance, and ensures the continuity of production operations. Attached Figure Description

[0020] Figure 1 This is a front perspective view of the present invention;

[0021] Figure 2 This is a top perspective view of the present invention;

[0022] Figure 3 This is a side perspective view of the present invention;

[0023] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0024] Figure 5 This is a schematic diagram of the clamping assembly of the present invention;

[0025] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0026] Figure 7 This is a schematic diagram of the vibrating screen mechanism of the present invention.

[0027] The components include: 1. Support frame; 2. Screen; 3. Vibrating screen mechanism; 301. Transmission column; 302. Guide column; 303. Pulley; 304. First motor; 305. Threaded block; 306. Slider; 307. Vibration damping block; 308. Connecting rod; 309. Sliding ring; 310. Buffer spring; 311. Sleeve; 312. Guide sleeve; 313. T-slot; 314. Annular toothed frame; 315. Limiting strip; 316. Second motor; 317, transmission rod; 318, half gear; 319, lever; 320, stop block; 4, clamping assembly; 401, mounting cylinder; 402, telescopic rod; 403, pressure plate; 404, rubber pad; 5, buffer assembly; 501, limit pad; 502, damping spring; 503, mounting base; 6, cleaning assembly; 601, electric guide rail; 602, connecting base; 603, brush roller; 604, third motor. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1 -Appendix Figure 7 The present invention will be further described in detail below.

[0029] This invention provides an ultra-large particle removal device, comprising a support frame 1. The inner side of the support frame 1 is provided with a screen 2, a vibrating screen mechanism 3, a pressing assembly 4, a buffer assembly 5, and a cleaning assembly 6. The screen 2 is mounted on the vibrating screen mechanism 3, which includes a longitudinal screen assembly and a transverse screen assembly. The longitudinal screen assembly includes two drive columns 301 and two guide columns 302. The upper and lower ends of the drive columns 301 are rotatably connected to the inner side of the support frame 1. A pulley 303 is fixedly connected to the top of the drive column 301, and belts are fitted around the outer circumference of the two pulleys 303. A first motor 304 is mounted on the top of the support frame 1. The output end of the first motor 304 is fixedly connected to the top of one of the drive columns 301. A thread is provided in the middle of the drive column 301, and a threaded block 305 is connected to its external thread. The thread in the middle of the drive column 301 is used for the reciprocating movement of the threaded block 305. The upper and lower ends of the guide columns 302 are fixedly connected to the inner side of the support frame 1, and a slider 306 is fitted around the outside of the guide columns 302.

[0030] Vibration damping blocks 307 are fixedly connected to the same side of the threaded block 305 and the slider 306. Connecting rods 308 are fixedly connected to the adjacent sides of the two vibration damping blocks 307. Sleeves 311 are sleeved on the outside of the connecting rods 308. The outer sides of the two sleeves 311 are fixedly connected to the outer side of the screen 2. Two buffer springs 310 are sleeved on the outside of the connecting rods 308. One end of the buffer spring 310 is fixedly connected to the outer side of the vibration damping block 307, and the other end of the buffer spring 310 is fixedly connected to the vibration damping block 307. The sleeves 311 are located in the middle of the two sliding rings 309. The transverse screen assembly includes two sets of guide sleeves 312, symmetrically arranged vertically and fixedly connected to the inner top wall of the support frame 1 via a frame. A second motor 316 is installed on the outer frame of one set of guide sleeves 312. A transmission rod 317 is fixedly connected to the output end. Two half gears 318 are fixedly connected to the outer side of the transmission rod 317. An annular toothed frame 314 is provided in the middle of each set of guide sleeves 312. Two sets of limiting strips 315 are provided on the outer side of the annular toothed frame 314. There are two limiting strips 315 in each set, which are respectively set on the outer sides of the annular toothed frame 314. T-shaped grooves 313 are opened on the adjacent sides of the two guide sleeves 312 in each set. The outer sides of the annular toothed frame 314 and the limiting strips 315 are slidably connected to the inner side of the T-shaped grooves 313. The upper and lower sides of the inner side of the annular toothed frame 314 are provided with teeth that mesh with the outer side of the half gears 318. A lever 319 is fixedly connected to the outer sides of the annular toothed frame 314. Two blocks 320 are fixedly connected to the outer sides of the screen 2. The outer side of the lever 319 is in contact with the outer side of the block 320.

[0031] The clamping assembly 4 includes four mounting cylinders 401, which are respectively installed in the holes opened at the four corners of the screen 2. Telescopic rods 402 are installed on the inner side of the mounting cylinders 401, one of which is electrically driven. Pressure plates 403 are fixedly connected to the top of the four telescopic rods 402. Rubber pads 404 are embedded in the bottom groove of the pressure plates 403, and the bottom of the rubber pads 404 is in contact with the top of the screen 2.

[0032] The buffer assembly 5 includes four limiting pads 501 and four mounting seats 503. The four limiting pads 501 are respectively located at the four corners of the inner bottom wall of the support frame 1. The top of the limiting pads 501 is hinged with a damping spring 502. The four mounting seats 503 are respectively located at the four bottom corners of the screen 2. The top of the damping spring 502 is hinged to the inner side of the mounting seat 503.

[0033] The cleaning assembly 6 includes two electric guide rails 601, which are installed on the outer sides of the screen 2. Connecting seats 602 are installed on the movable seats of the electric guide rails 601. Brush rollers 603 are rotatably connected to the adjacent sides of the two connecting seats 602. The outer brush of the brush roller 603 is in contact with the bottom of the screen 2. A third motor 604 is installed on the outer side of one of the connecting seats 602. The output end of the third motor 604 is fixedly connected to one end of the brush roller 603.

[0034] Specifically, this device includes a support frame 1, a screen 2, a vibrating screen mechanism 3, a pressing assembly 4, a buffer assembly 5, and a cleaning assembly 6. The support frame 1 serves as the main support structure, and its inner space is used to accommodate the core components for screening and cleaning.

[0035] The inner bottom wall of the support frame 1 is provided with buffer components 5 at the four corners. The buffer components 5 include four limiting pads 501 and four mounting seats 503. The limiting pads 501 are fixedly installed at the bottom of the support frame 1. The top of the limiting pads 501 is connected to the damping springs 502 by hinge. The top of the damping springs 502 is hinged to the inner side of the mounting seats 503. The mounting seats 503 are fixedly connected to the bottom four corners of the screen 2. With the setting of the damping springs 502, the screen 2 can generate elastic displacement when subjected to excitation force, while avoiding the vibration energy from being directly and rigidly transmitted to the bottom of the support frame 1.

[0036] A clamping assembly 4 is provided above the screen 2 for auxiliary fixing and limiting of the screen 2. The clamping assembly 4 includes four mounting cylinders 401, which are respectively embedded in the holes at the four corners of the screen 2. The mounting cylinders 401 are equipped with telescopic rods 402. One of the telescopic rods 402 is electrically driven, and the others can be driven or damped telescopic structures. The tops of the four telescopic rods 402 are fixedly connected to a pressure plate 403. A rubber pad 404 is embedded in the groove at the bottom of the pressure plate 403. The bottom surface of the rubber pad 404 is tightly attached to the top surface of the screen 2. This structure ensures the stability of the screen 2 while absorbing some high-frequency vibrations through the rubber pad 404 to prevent damage to the parts caused by hard collisions.

[0037] The vibrating screen mechanism 3 is used to drive the screen 2 to perform multi-dimensional screening motion. It includes a longitudinal screen assembly and a transverse screen assembly. The longitudinal screen assembly is mainly responsible for the up-and-down reciprocating motion of the screen 2. A first motor 304 is installed on the top of the support frame 1. The output shaft of the first motor 304 is fixedly connected to the top of the transmission column 301. There are two transmission columns 301. Both their upper and lower ends are rotatably connected to the inner side of the support frame 1 and can rotate around their own axis. The middle part of the transmission column 301 is machined with external threads and threadedly connected with a threaded block 305. When the transmission column 301 rotates, the threaded block 305 moves up and down under the action of the thread guide angle. The top part of the transmission column 301 is fixedly connected with a pulley 303. The outer circumference of the two pulleys 303 is covered with a belt. Under the connection between the pulleys 303 and the belt, the two transmission columns 301 can be driven to rotate simultaneously by a first motor 304.

[0038] To limit the rotation of the threaded block 305 and guide its lifting and lowering, two guide columns 302 are fixedly provided on the inner side of the support frame 1. A slider 306 is sleeved on the outside of the guide columns 302. The threaded block 305 and the slider 306 are at the same height, and both of them are fixedly connected to the inward side with a damping block 307. The two damping blocks 307 are fixedly connected by a connecting rod 308. A sleeve 311 is sleeved on the outside of the connecting rod 308. The outer wall of the sleeve 311 is fixedly connected to the outer wall of the screen 2.

[0039] Two buffer springs 310 are also sleeved on the connecting rod 308. One end of the buffer spring 310 abuts against the outside of the damping block 307, and the other end abuts against the side of the sliding ring 309 located on the connecting rod 308. The sleeve 311 is located between the two sliding rings 309. The first motor 304 drives the transmission column 301 to rotate, which drives the threaded block 305 and the slider 306 to move back and forth in the vertical direction. This moving force is transmitted to the screen 2 through the damping block 307, the buffer spring 310 and the sleeve 311, causing the screen 2 to vibrate longitudinally, thereby realizing the stratification and screening of particles.

[0040] The transverse screen assembly is used to drive the screen 2 to generate horizontal shaking or displacement to improve screening efficiency. The transverse screen assembly includes two sets of guide sleeves 312 fixed to the inner top wall of the support frame 1 by a frame. The guide sleeves 312 are symmetrically distributed up and down. A second motor 316 is installed on the outside of one set of guide sleeves 312. The output end of the second motor 316 is connected to a transmission rod 317. Two half gears 318 are fixed on the transmission rod 317.

[0041] Each guide sleeve 312 has an annular toothed frame 314 in the middle. The annular toothed frame 314 has teeth on both the upper and lower sides inside. These teeth mesh with the external teeth of the half gear 318. A T-shaped groove 313 is opened on the opposite side of the guide sleeve 312. A limiting strip 315 is provided on the outer side of the annular toothed frame 314. The limiting strip 315 is slidably engaged in the T-shaped groove 313, thereby limiting the annular toothed frame 314 to move only in the horizontal direction.

[0042] The second motor 316 drives the half gear 318 to rotate. Since the half gear 318 only has teeth on part of its circumference, the intermittent meshing of its teeth with the upper and lower teeth of the annular toothed frame 314 will drive the annular toothed frame 314 to reciprocate in the T-groove 313. The outer sides of the annular toothed frame 314 are fixed with levers 319. Correspondingly, the outer sides of the screen 2 are fixed with blocks 320. When the annular toothed frame 314 moves, the levers 319 strike or push the blocks 320, forcing the screen 2 to produce instantaneous displacement or vibration in the horizontal direction. Combined with longitudinal vibration, it forms a composite screening effect, which helps to quickly separate ultra-large particles.

[0043] To address the problem of easy clogging of the screen 2, the device is equipped with a cleaning component 6. The cleaning component 6 includes two electric guide rails 601 installed on both sides of the outside of the screen 2. A connecting seat 602 is fixedly installed on the movable seat of the electric guide rail 601. A brush roller 603 is rotatably installed between the two connecting seats 602. The bristles on the surface of the brush roller 603 are in contact with the bottom surface of the screen 2.

[0044] A third motor 604 is mounted on the outer side of one of the connecting seats 602, and the output shaft of the third motor 604 is fixedly connected to one end of the brush roller 603. During the cleaning operation, the third motor 604 drives the brush roller 603 to rotate, while the electric guide rail 601 drives the connecting seat 602 to move along the length of the screen 2, so that the brush roller 603 performs a full-coverage roller cleaning of the bottom of the screen 2 to remove particles stuck in the mesh.

[0045] In this embodiment, the first motor 304, the second motor 316, and the third motor 604 are all electrically connected to the external control system. The vibration frequency and cleaning cycle can be adjusted according to the screening requirements. The vibration damping block 307 and buffer spring 310 and other elastic elements used in each connection part can effectively extend the service life of the mechanical structure and reduce the operating noise.

[0046] Working Principle: This device drives the screen 2 to perform compound vibration through the vibrating screening mechanism 3, achieving particle stratification and separation. A cleaning component 6 further assists in self-cleaning the screen 2. At the start of operation, the electric telescopic rod 402 of the pressing component 4 drives the pressure plate 403 to press down, and the rubber pad 404 limits and stabilizes the screen 2. During vibration, the damping spring 502 in the buffer component 5 supports the main weight of the screen 2 and absorbs some of the vibration impact, ensuring the stability of the device. The longitudinal screening component of the vibrating screening mechanism 3 drives the transmission column 301 to rotate through the first motor 304, causing the threaded block 305 to move up and down along the guide column 302. This vertical reciprocating motion is transmitted to the screen 2 through the damping block 307 and the buffer spring 310, driving the screen 2 to generate vertical vibration. The direct vibration causes the particles to be screened to stratify and pass through the screen. At the same time, the transverse screen assembly drives the half gear 318 through the second motor 316 to periodically mesh with the annular toothed frame 314, forcing the annular toothed frame 314 to move horizontally back and forth in the T-groove 313. The lever 319 strikes the stop block 320 of the screen 2, superimposing the horizontal excitation force or displacement, which helps to break up the particle agglomeration and accelerate the horizontal conveying of oversized particles on the screen surface. During the screening process or at a preset cycle, the cleaning assembly 6 is activated, and the third motor 604 drives the brush roller 603 to rotate at high speed. At the same time, the electric guide rail 601 drives the brush roller 603 to move along the bottom of the screen 2 to perform full-coverage roller cleaning of the screen holes, effectively removing the particles stuck in the screen holes and ensuring the continuous high-efficiency operation of the screen 2.

Claims

1. A device for removing ultra-large particles, comprising a support frame (1), characterized in that, The inner side of the support frame (1) is provided with a screen (2), a vibrating screen mechanism (3), a pressing assembly (4), a buffer assembly (5), and a cleaning assembly (6). The screen (2) is mounted on the vibrating screen mechanism (3). The vibrating screen mechanism (3) includes a longitudinal screen assembly and a transverse screen assembly. The longitudinal screen assembly includes two drive columns (301) and two guide columns (302). The upper and lower ends of the drive columns (301) are rotatably connected to the inner side of the support frame (1). The top end of the drive columns (301) is fixedly connected to a pulley (303). The two pulleys (301, 302, 303, 303, 304, 305, 306, 307, 308, 309, 3000, 3000, 309 ... 3) The outer periphery is fitted with a belt, and the top of the support frame (1) is equipped with a first motor (304). The output end of the first motor (304) is fixedly connected to the top of one of the transmission columns (301). The middle part of the transmission column (301) is provided with a thread, and a threaded block (305) is connected to its external thread. The thread in the middle of the transmission column (301) is used for the threaded block (305) to move up and down. The upper and lower ends of the guide column (302) are fixedly connected to the inner side of the support frame (1). The outer side of the guide column (302) is fitted with a slider (306).

2. The ultra-large particle removal device according to claim 1, characterized in that, Vibration damping blocks (307) are fixedly connected to the same side of the threaded block (305) and the slider (306). Connecting rods (308) are fixedly connected to the adjacent sides of the two vibration damping blocks (307). Sleeves (311) are sleeved on the outside of the connecting rods (308). The outer sides of the two sleeves (311) are fixedly connected to the outer side of the screen (2).

3. The ultra-large particle removal device according to claim 2, characterized in that, Two buffer springs (310) are sleeved on the outside of the connecting rod (308). One end of the buffer spring (310) is fixedly connected to the outside of the damping block (307), and the other end of the buffer spring (310) is fixedly connected to the damping block (307). The sleeve (311) is located in the middle of the two sliding rings (309).

4. The ultra-large particle removal device according to claim 1, characterized in that, The transverse screen assembly includes two sets of guide sleeves (312). There are two guide sleeves (312), which are symmetrically arranged and fixedly connected to the inner top wall of the support frame (1) through a frame. A second motor (316) is installed on the outer frame of one set of guide sleeves (312). A transmission rod (317) is fixedly connected to the output end of the second motor (316). Two half gears (318) are fixedly connected to the outer side of the transmission rod (317).

5. The ultra-large particle removal device according to claim 4, characterized in that, Each set of guide sleeves (312) is provided with an annular toothed frame (314) in the middle. Two sets of limiting strips (315) are provided on the outer side of the annular toothed frame (314). There are two limiting strips (315) in each set, which are respectively provided on the outer sides of the annular toothed frame (314). T-shaped grooves (313) are provided on the adjacent sides of the two guide sleeves (312) in each set. The outer sides of the annular toothed frame (314) and the limiting strips (315) are slidably connected to the inner side of the T-shaped grooves (313).

6. The ultra-large particle removal device according to claim 5, characterized in that, The inner upper and lower sides of the annular toothed frame (314) are provided with teeth that mesh with the outer side of the half gear (318). The outer sides of the annular toothed frame (314) are fixedly connected with levers (319). The outer sides of the screen (2) are fixedly connected with two blocks (320). The outer side of the lever (319) is in contact with the outer side of the block (320).

7. The ultra-large particle removal device according to claim 1, characterized in that, The pressing assembly (4) includes four mounting cylinders (401), which are respectively installed in the holes opened at the four corners of the screen (2). A telescopic rod (402) is installed on the inner side of the mounting cylinder (401), one of which is electrically driven. A pressure plate (403) is fixedly connected to the top of the four telescopic rods (402). A rubber pad (404) is embedded in the bottom groove of the pressure plate (403), and the bottom of the rubber pad (404) is in contact with the top of the screen (2).

8. The ultra-large particle removal device according to claim 1, characterized in that, The buffer assembly (5) includes four limiting pads (501) and four mounting seats (503). The four limiting pads (501) are respectively located at the four corners of the inner bottom wall of the support frame (1). The top of the limiting pads (501) is hinged with a damping spring (502). The four mounting seats (503) are respectively located at the four corners of the bottom of the screen (2). The top of the damping spring (502) is hinged to the inner side of the mounting seat (503).

9. The ultra-large particle removal device according to claim 1, characterized in that, The cleaning assembly (6) includes two electric guide rails (601), which are installed on the outer sides of the screen (2). Connecting seats (602) are installed on the movable seats of the electric guide rails (601), and brush rollers (603) are rotatably connected to the adjacent sides of the two connecting seats (602).

10. The ultra-large particle removal device according to claim 9, characterized in that, The outer brush of the brush roller (603) is in contact with the bottom of the screen (2), and a third motor (604) is installed on the outer side of one of the connecting seats (602), and the output end of the third motor (604) is fixedly connected to one end of the brush roller (603).

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