An efficient fine coal dewatering screen

Abstract

The present invention discloses a high-efficiency clean coal dewatering screen, and proposes the following scheme, which includes a dewatering screen body, wherein the dewatering screen body includes a mounting base, and a mounting frame mounted on the top of the mounting base through a plurality of elastic components; by arranging a driving component and a scraping structure, in cooperation with the vibration motor body, the vibration amplitude of the screen plate is increased, thereby increasing the movement amplitude of the clean coal on the surface of the screen plate, and when the reciprocating rod rotates, the scraper can be driven to reciprocate on the surface of the screen plate through the movable block and the connecting rod, thereby scraping the clean coal on the surface of the screen plate, further ensuring that the clean coal can fully move on the surface of the screen plate, thereby optimizing the dewatering capacity of the clean coal dewatering screen, so as to achieve a more thorough dewatering effect and higher dewatering efficiency, and when the scraper moves on the surface of the screen plate, it can clean the clean coal blocked in the sieve holes of the screen plate, and has good anti-clogging performance to ensure the stable operation of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of dewatering screens, in particular to a high-efficiency clean coal dewatering screen. Background Art

[0002] After washing and removing gangue from raw coal, it becomes high-quality coal suitable for special purposes, which is called clean coal. Clean coal needs to go through a dehydration process to remove most of the water in the clean coal, obtaining relatively dry clean coal. It is then dried to obtain completely dry clean coal. The clean coal dewatering screen is a vibrating dehydration equipment. Due to its large dehydration capacity, it is usually used in the clean coal dehydration process. It uses vibration to remove most of the water in the clean coal, obtaining relatively dry clean coal.

[0003] At present, most of the common clean coal dewatering screens on the market have a relatively simple structure. They only use a vibration motor to drive the screen to vibrate, so that the clean coal forms a state of continuous rolling on the screen, thereby achieving the purpose of dehydration. The vibration amplitude of the clean coal is limited by the single vibration motor, which leads to certain limitations in the dehydration effect. In addition, in actual use, due to the large number of apertures on the surface of the screen, the clean coal is easily stuck in the screen hole, causing blockage, affecting the normal operation of the equipment, and requiring the operator to stop the machine for cleaning, which has certain limitations. In response to the above problems, the present invention document proposes a high-efficiency clean coal dewatering screen. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a method to ensure that the clean coal can fully move on the surface of the screen plate, thereby optimizing the dehydration capacity of the clean coal dehydration screen to achieve a more thorough dehydration effect and higher dehydration efficiency. When the scraper moves on the surface of the screen plate, it can clean the clean coal blocked in the sieve holes of the screen plate, and has good anti-clogging performance to ensure the stable operation of the device. An efficient clean coal dehydration screen.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A high-efficiency clean coal dewatering screen comprises a dewatering screen body, the dewatering screen body comprises a mounting base, and a mounting frame mounted on the top of the mounting base via a plurality of elastic components, a vibration motor body is mounted on the mounting frame, two mounting plates are slidably connected to the interior of the mounting frame, and the same sieve plate is fixedly connected to the two mounting plates, a reset structure is provided on the mounting plate, a driving assembly is provided on both the mounting plate and the mounting frame, a scraping structure is provided on the driving assembly for turning over the material on the surface of the sieve plate, and a drying structure and an air outlet structure are provided on the mounting frame for drying the material on the surface of the sieve plate;

[0007] The driving assembly includes two dual-axis motors installed on the mounting frame, and a force-bearing plate fixedly connected to the mounting plate. A cam is fixedly connected to the output ends of the two dual-axis motors on the side away from each other, and a reciprocating rod is fixedly connected to the output ends of the two dual-axis motors on the side close to each other. Spiral reciprocating grooves are provided at both ends of the outer side of the reciprocating rod. The scraping structure includes two movable blocks slidably connected to the outer wall of the reciprocating rod, and two connecting rods are slidably connected to the movable block. The bottom ends of the two connecting rods located inside the same movable block are fixedly connected to the same scraper.

[0008] Preferably, when the cam rotates, it can periodically fit with the adjacent force-bearing plate, and the force-bearing plate is slidably connected to the mounting frame.

[0009] Preferably, the cross-sectional shape of the scraper is set to be triangular, and the scraper is in contact with the surface of the sieve plate.

[0010] Preferably, the clean coal dewatering screen also includes a limiting assembly for guiding the scraper, the limiting assembly includes a limiting rod, at least one of the limiting rods is fixedly connected to two mounting plates, the outer wall of the limiting rod is slidably connected to two limiting blocks, and the limiting blocks are fixedly connected to the adjacent scraper.

[0011] Preferably, the reset structure includes several first reset plates fixedly connected to the mounting plate, the first reset plate is fixedly connected to the second reset plate through a telescopic rod, the second reset plate is fixedly connected to the mounting frame, and a spring is fixedly connected between the first reset plate and the second reset plate.

[0012] Preferably, the spring is sleeved on the outside of the telescopic rod, and the first reset plate is slidably connected to the mounting bracket.

[0013] Preferably, the drying structure includes two groups of rotating shafts rotatably connected to the mounting frame, the rotating shafts are fixedly connected to driven gears and fan blades, the two driven gears in the same group are engaged with the same driving gear, and the driving gear is fixedly connected to the adjacent dual-axis motor output end.

[0014] Preferably, the drying structure also includes a first protective cover fixedly connected to the mounting frame, the driving gear and the driven gear are both located inside the adjacent first protective cover, the diameter of the driving gear is larger than the diameter of the driven gear, two second protective covers are fixedly connected to the first protective cover, and the fan blades are located inside the adjacent second protective covers.

[0015] Preferably, the air outlet structure includes two groups of fume hoods fixedly connected to the mounting frame, a plurality of air outlet covers are fixedly connected to the bottom of the fume hood, and the fume hood is connected to the adjacent second protective cover through an air duct.

[0016] Preferably, when the fan blades rotate, air enters the interior of the second protective cover, then enters the interior of the fume hood through the air duct, and finally is discharged through the air outlet cover.

[0017] Compared with the prior art, the present invention provides a high-efficiency clean coal dewatering screen with the following beneficial effects:

[0018] 1. The high-efficiency clean coal dewatering screen is provided with a driving assembly and a scraping structure. When the operator uses the device to dehydrate the clean coal, the operator turns on the vibration motor body and the dual-axis motor. When the dual-axis motor is working, it drives the cam and the reciprocating rod to rotate. When the cam rotates, it squeezes the force plate. With the cooperation of the reset structure, the mounting plate can drive the screen plate to reciprocate up and down, cooperate with the vibration motor body, increase the vibration amplitude of the screen plate, thereby increasing the movement amplitude of the clean coal on the screen plate surface, and when the reciprocating rod rotates, it can drive the scraper to reciprocate on the screen plate surface through the movable block and the connecting rod, thereby scraping the clean coal on the screen plate surface, further ensuring that the clean coal can fully move on the screen plate surface, thereby optimizing the dewatering capacity of the clean coal dewatering screen, so as to achieve a more thorough dehydration effect and higher dehydration efficiency, and when the scraper moves on the screen plate surface, it can clean the clean coal blocked in the sieve holes of the screen plate, and has good anti-clogging performance to ensure the stable operation of the device.

[0019] 2. The high-efficiency clean coal dewatering screen is provided with a drying structure and an air outlet structure. When the dual-shaft motor is working, it can drive the driving gear to rotate. Since the diameter of the driving gear is larger than that of the driven gear, the rotating shaft can drive the fan blades to rotate at high speed. The outside air enters the fume hood through the second protective cover and the air duct, and is then discharged through the air outlet cover, thereby blowing the clean coal on the surface of the screen plate, thereby performing auxiliary dehydration treatment and further enhancing the dehydration performance of the clean coal dewatering screen.

[0020] 3. The high-efficiency clean coal dewatering screen, by setting a limit assembly, can play a certain limiting role on the scraper with the cooperation of the limit rod and the limit block, ensuring that when the mounting plate drives the screen plate to move up and down inside the mounting frame, the scraper is still always in close contact with the top surface of the screen plate, thereby ensuring that the scraper can always scrape the clean coal on the surface of the screen plate and ensure the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional view of a high-efficiency clean coal dewatering screen proposed by the present invention;

[0022] Figure 2 A view of the connection structure of the dewatering screen body, the driving assembly, the scraping structure and the reset structure of the present invention;

[0023] Figure 3A view of the connection structure of the mounting plate, the screen plate, the stress-bearing plate and the reset structure of the present invention;

[0024] Figure 4 A view of the connection structure of the dual-axis motor, cam and reciprocating rod of the present invention;

[0025] Figure 5 A view of the connecting structure of the connecting rod, scraper and limit block of the present invention;

[0026] Figure 6 A view of the connection structure of the second protective cover, the air duct, the fume hood and the air outlet cover of the present invention;

[0027] Figure 7 For the present invention Figure 4 A magnified view of point A;

[0028] Figure 8 For the present invention Figure 2 Magnified view of point B;

[0029] Figure 9 For the present invention Figure 3 Enlarged view of point C.

[0030] Figure: 1. Dewatering screen body; 101. Mounting base; 102. Elastic component; 103. Mounting frame; 104. Mounting plate; 105. Screen plate; 106. Vibration motor body; 2. Driving assembly; 201. Dual-axis motor; 202. Cam; 203. Reciprocating rod; 204. Force plate; 3. Scraping structure; 301. Movable block; 302. Connecting rod; 303. Scraping plate; 4. Reset structure; 401. A reset plate; 402, telescopic rod; 403, second reset plate; 404, spring; 5, drying structure; 501, rotating shaft; 502, driving gear; 503, driven gear; 504, fan blade; 505, first protective cover; 506, second protective cover; 6, air outlet structure; 601, fume hood; 602, air outlet cover; 603, air duct; 7, limit assembly; 701, limit rod; 702, limit block. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0033] Example 1: Reference Figure 1-5 , a high-efficiency clean coal dewatering screen, including a dewatering screen body 1, the dewatering screen body 1 includes a mounting base 101, and a mounting frame 103 mounted on the top of the mounting base 101 through a plurality of elastic components 102, a vibration motor body 106 is mounted on the mounting frame 103, two mounting plates 104 are slidably connected inside the mounting frame 103, and the same sieve plate 105 is fixedly connected to the two mounting plates 104, a reset structure 4 is provided on the mounting plate 104, a driving component 2 is provided on the mounting plate 104 and the mounting frame 103, a scraping structure 3 for turning over the material on the surface of the sieve plate 105 is provided on the driving component 2, and a drying structure 5 and an air outlet structure 6 for drying the material on the surface of the sieve plate 105 are provided on the mounting frame 103;

[0034] The driving assembly 2 includes two dual-axis motors 201 installed on the mounting frame 103, and a force plate 204 fixedly connected to the mounting plate 104. The output ends of the two dual-axis motors 201 on the side away from each other are fixedly connected to a cam 202, and the output ends of the two dual-axis motors 201 on the side close to each other are commonly fixedly connected to a reciprocating rod 203. Spiral reciprocating grooves are provided at both ends of the outer side of the reciprocating rod 203. The scraping structure 3 includes two movable blocks 301 slidably connected to the outer wall of the reciprocating rod 203. Two connecting rods 302 are slidably connected to the movable block 301. The bottom ends of the two connecting rods 302 located inside the same movable block 301 are fixedly connected to the same scraper 303.

[0035] In the present invention, when the cam 202 rotates, it can periodically fit with the nearby force-bearing plate 204, and the force-bearing plate 204 is slidably connected to the mounting frame 103. By setting the cam 202 and the force-bearing plate 204, when the dual-axis motor 201 drives the cam 202 to rotate, the cam 202 will periodically fit with the force-bearing plate 204, thereby squeezing the mounting plate 104 and the screen plate 105, increasing the vibration amplitude of the screen plate 105, thereby increasing the movement amplitude of the clean coal on the surface of the screen plate 105, so that the clean coal can fully move on the surface of the screen plate 105, thereby optimizing the dehydration capacity of the clean coal dehydration screen to achieve a more thorough dehydration effect and higher dehydration efficiency.

[0036] In the present invention, the cross-sectional shape of the scraper 303 is set to be a triangle, and the scraper 303 is in contact with the surface of the sieve plate 105. By setting the cross-sectional shape of the scraper 303 to be a triangle, the squeezing force of the scraper 303 on the clean coal when it moves on the surface of the sieve plate 105 can be reduced, thereby avoiding damage to the clean coal and ensuring the quality of the clean coal produced subsequently.

[0037] In the present invention, the clean coal dewatering screen also includes a limit assembly 7 for guiding the scraper 303. The limit assembly 7 includes a limit rod 701. At least one limit rod 701 is fixedly connected to the two mounting plates 104. The outer wall of the limit rod 701 is slidably connected to two limit blocks 702. The limit blocks 702 are fixedly connected to the adjacent scrapers 303. By setting the limit rod 701 and the limit block 702, the limit rod 701 and the limit block 702 cooperate with each other to limit the scraper 303 to a certain extent, ensuring that when the mounting plate 104 drives the screen plate 105 to move up and down inside the mounting frame 103, the scraper 303 is still always in a state of close contact with the top surface of the screen plate 105, thereby ensuring that the scraper 303 can always scrape the clean coal on the surface of the screen plate 105, thereby ensuring the stability of the device.

[0038] In the present invention, the reset structure 4 includes several first reset plates 401 fixedly connected to the mounting plate 104, and the first reset plate 401 is fixedly connected to the second reset plate 403 through the telescopic rod 402, the second reset plate 403 is fixedly connected to the mounting frame 103, and a spring 404 is fixedly connected between the first reset plate 401 and the second reset plate 403, the spring 404 is sleeved on the outside of the telescopic rod 402, and the first reset plate 401 is slidably connected to the mounting frame 103. By arranging the first reset plate 401, the telescopic rod 402, the second reset plate 403 and the spring 404, under the cooperation of the first reset plate 401, the telescopic rod 402, the second reset plate 403 and the spring 404, when the dual-axis motor 201 drives the cam 202 to rotate, the mounting plate 104 and the screen plate 105 can stably reciprocate up and down, thereby facilitating the dehydration of the clean coal on the surface of the screen plate 105.

[0039] Example 2: Reference Figure 1-9, a high-efficiency clean coal dewatering screen, including a dewatering screen body 1, the dewatering screen body 1 includes a mounting base 101, and a mounting frame 103 mounted on the top of the mounting base 101 through a plurality of elastic components 102, a vibration motor body 106 is mounted on the mounting frame 103, two mounting plates 104 are slidably connected inside the mounting frame 103, and the same sieve plate 105 is fixedly connected to the two mounting plates 104, a reset structure 4 is provided on the mounting plate 104, a driving component 2 is provided on the mounting plate 104 and the mounting frame 103, a scraping structure 3 for turning over the material on the surface of the sieve plate 105 is provided on the driving component 2, and a drying structure 5 and an air outlet structure 6 for drying the material on the surface of the sieve plate 105 are provided on the mounting frame 103;

[0040] The driving assembly 2 includes two dual-axis motors 201 installed on the mounting frame 103, and a force plate 204 fixedly connected to the mounting plate 104. The output ends of the two dual-axis motors 201 on the side away from each other are fixedly connected to a cam 202, and the output ends of the two dual-axis motors 201 on the side close to each other are commonly fixedly connected to a reciprocating rod 203. Spiral reciprocating grooves are provided at both ends of the outer side of the reciprocating rod 203. The scraping structure 3 includes two movable blocks 301 slidably connected to the outer wall of the reciprocating rod 203. Two connecting rods 302 are slidably connected to the movable block 301. The bottom ends of the two connecting rods 302 located inside the same movable block 301 are fixedly connected to the same scraper 303.

[0041] In the present invention, when the cam 202 rotates, it can periodically fit with the nearby force-bearing plate 204, and the force-bearing plate 204 is slidably connected to the mounting frame 103. By setting the cam 202 and the force-bearing plate 204, when the dual-axis motor 201 drives the cam 202 to rotate, the cam 202 will periodically fit with the force-bearing plate 204, thereby squeezing the mounting plate 104 and the screen plate 105, increasing the vibration amplitude of the screen plate 105, thereby increasing the movement amplitude of the clean coal on the surface of the screen plate 105, so that the clean coal can fully move on the surface of the screen plate 105, thereby optimizing the dehydration capacity of the clean coal dehydration screen to achieve a more thorough dehydration effect and higher dehydration efficiency.

[0042] In the present invention, the cross-sectional shape of the scraper 303 is set to be a triangle, and the scraper 303 is in contact with the surface of the sieve plate 105. By setting the cross-sectional shape of the scraper 303 to be a triangle, the squeezing force of the scraper 303 on the clean coal when it moves on the surface of the sieve plate 105 can be reduced, thereby avoiding damage to the clean coal and ensuring the quality of the clean coal produced subsequently.

[0043] In the present invention, the clean coal dewatering screen also includes a limit assembly 7 for guiding the scraper 303. The limit assembly 7 includes a limit rod 701. At least one limit rod 701 is fixedly connected to the two mounting plates 104. The outer wall of the limit rod 701 is slidably connected to two limit blocks 702. The limit blocks 702 are fixedly connected to the adjacent scrapers 303. By setting the limit rod 701 and the limit block 702, the limit rod 701 and the limit block 702 cooperate with each other to limit the scraper 303 to a certain extent, ensuring that when the mounting plate 104 drives the screen plate 105 to move up and down inside the mounting frame 103, the scraper 303 is still always in a state of close contact with the top surface of the screen plate 105, thereby ensuring that the scraper 303 can always scrape the clean coal on the surface of the screen plate 105, thereby ensuring the stability of the device.

[0044] In the present invention, the reset structure 4 includes several first reset plates 401 fixedly connected to the mounting plate 104, and the first reset plate 401 is fixedly connected to the second reset plate 403 through the telescopic rod 402, the second reset plate 403 is fixedly connected to the mounting frame 103, and a spring 404 is fixedly connected between the first reset plate 401 and the second reset plate 403, the spring 404 is sleeved on the outside of the telescopic rod 402, and the first reset plate 401 is slidably connected to the mounting frame 103. By arranging the first reset plate 401, the telescopic rod 402, the second reset plate 403 and the spring 404, under the cooperation of the first reset plate 401, the telescopic rod 402, the second reset plate 403 and the spring 404, when the dual-axis motor 201 drives the cam 202 to rotate, the mounting plate 104 and the screen plate 105 can stably reciprocate up and down, thereby facilitating the dehydration of the clean coal on the surface of the screen plate 105.

[0045] In the present invention, the drying structure 5 includes two groups of rotating shafts 501 rotatably connected to the mounting frame 103, and the rotating shafts 501 are fixedly connected to the driven gears 503 and the fan blades 504. The two driven gears 503 of the same group are meshed with the same driving gear 502, and the driving gear 502 is fixedly connected to the output end of the nearby dual-axis motor 201. The drying structure 5 also includes a first protective cover 505 fixedly connected to the mounting frame 103, and the driving gear 502 and the driven gear 503 are both located inside the nearby first protective cover 505. The diameter of the driving gear 502 is larger than the diameter of the driven gear 503. Two second protective covers 506 are fixedly connected to the first protective cover 505, and the fan blades 504 are located inside the nearby second protective cover 506. The air outlet structure 6 includes two groups of fume hoods 601 fixedly connected to the mounting frame 103. Several air outlet covers 602 are fixedly connected to the bottom of the fume hood 601. The air duct 603 is connected to the second protective cover 506 nearby. When the fan blades 504 rotate, air enters the second protective cover 506, then enters the interior of the fume hood 601 through the air duct 603, and is finally discharged through the air outlet hood 602. By arranging the rotating shaft 501, the driving gear 502, the driven gear 503, the fan blades 504, the fume hood 601, the air outlet hood 602 and the air duct 603, when the dual-axis motor 201 is working, it can drive the driving gear 502 to rotate. Since the diameter of the driving gear 502 is larger than the diameter of the driven gear 503, the rotating shaft 501 can drive the fan blades 504 to rotate at high speed, and the outside air enters the interior of the fume hood 601 through the second protective cover 506 and the air duct 603, and is then discharged through the air outlet hood 602, so that the clean coal on the surface of the screen plate 105 can be blown, thereby performing auxiliary dehydration treatment and further enhancing the dehydration performance of the clean coal dehydration screen.

[0046] Working principle: When the operator uses the device to dehydrate clean coal, the operator turns on the vibration motor body 106 and the dual-axis motor 201. When the dual-axis motor 201 is working, it drives the cam 202 and the reciprocating rod 203 to rotate. When the cam 202 rotates, it squeezes the force plate 204. The force plate 204 drives the mounting plate 104 and the screen plate 105 to move closer to the mounting base 101, causing the first reset plate 401 to move away from the second reset plate 403, thereby stretching the spring 404. When the cam 202 releases the squeeze on the force plate 204, the spring 404 Under the action of the force, the mounting plate 104 drives the screen plate 105 to move away from the mounting base 101, so that the mounting plate 104 can drive the screen plate 105 to reciprocate up and down, cooperate with the vibration motor body 106 and the elastic component 102, increase the vibration amplitude of the screen plate 105, thereby increasing the movement amplitude of the clean coal on the surface of the screen plate 105, and when the reciprocating rod 203 rotates, it can drive the scraper 303 to reciprocate on the surface of the screen plate 105 through the movable block 301 and the connecting rod 302, thereby scraping the clean coal on the surface of the screen plate 105, so that the clean coal can fully move on the surface of the screen plate 105;

[0047] When the dual-axis motor 201 is working, it can drive the driving gear 502 to rotate. Since the diameter of the driving gear 502 is larger than the diameter of the driven gear 503, the rotating shaft 501 can drive the fan blades 504 to rotate at high speed. The outside air enters the fume hood 601 through the second protective cover 506 and the air duct 603, and is then discharged through the air outlet hood 602, so that the clean coal on the surface of the sieve plate 105 can be blown, thereby assisting the dehydration process.

[0048] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A high-efficiency clean coal dewatering screen, comprising a dewatering screen body (1), the dewatering screen body (1) comprising a mounting base (101), and a mounting frame (103) mounted on the top of the mounting base (101) via a plurality of elastic components (102), a vibration motor body (106) being mounted on the mounting frame (103), characterized in that: Two mounting plates (104) are slidably connected to the interior of the mounting frame (103), and the same sieve plate (105) is fixedly connected to the two mounting plates (104), a reset structure (4) is provided on the mounting plate (104), a driving assembly (2) is provided on both the mounting plate (104) and the mounting frame (103), a scraping structure (3) for turning over the material on the surface of the sieve plate (105) is provided on the driving assembly (2), and a drying structure (5) and an air outlet structure (6) for drying the material on the surface of the sieve plate (105) are provided on the mounting frame (103); The driving assembly (2) comprises two dual-axis motors (201) mounted on a mounting frame (103), and a force-bearing plate (204) fixedly connected to a mounting plate (104); a cam (202) is fixedly connected to the output ends of the two dual-axis motors (201) on a side away from each other; a reciprocating rod (203) is fixedly connected to the output ends of the two dual-axis motors (201) on a side close to each other; spiral reciprocating grooves are provided at both ends of the outer side of the reciprocating rod (203); the scraping structure (3) comprises two movable blocks (301) slidably connected to the outer wall of the reciprocating rod (203); two connecting rods (302) are slidably connected to the movable block (301); and the bottom ends of the two connecting rods (302) located inside the same movable block (301) are fixedly connected to the same scraper (303); The air outlet structure (6) comprises two groups of fume hoods (601) fixedly connected to the mounting frame (103), a plurality of air outlet covers (602) fixedly connected to the bottom of the fume hood (601), and the fume hood (601) is connected to a second protective cover (506) adjacent to the fume hood via an air guide pipe (603); The cross-sectional shape of the scraper (303) is set to be triangular, and the scraper (303) is in contact with the surface of the sieve plate (105); When the cam (202) rotates, it can periodically fit with the adjacent force-bearing plate (204), and the force-bearing plate (204) is slidably connected to the mounting frame (103); The clean coal dewatering screen further comprises a limiting assembly (7) for guiding the scraper (303), wherein the limiting assembly (7) comprises a limiting rod (701), at least one of the limiting rods (701) being fixedly connected to two mounting plates (104), and two limiting blocks (702) being slidably connected to the outer wall of the limiting rod (701), and the limiting blocks (702) being fixedly connected to the adjacent scraper (303).

2. A high-efficiency clean coal dewatering screen according to claim 1, characterized in that: The reset structure (4) comprises a plurality of first reset plates (401) fixedly connected to the mounting plate (104); a second reset plate (403) is fixedly connected to the first reset plate (401) via a telescopic rod (402); the second reset plate (403) is fixedly connected to the mounting frame (103); and a spring (404) is fixedly connected between the first reset plate (401) and the second reset plate (403).

3. The high-efficiency clean coal dewatering screen according to claim 2, characterized in that: The spring (404) is sleeved on the outside of the telescopic rod (402), and the first reset plate (401) is slidably connected to the mounting frame (103).

4. The high-efficiency clean coal dewatering screen according to claim 1, characterized in that: The drying structure (5) comprises two groups of rotating shafts (501) rotatably connected to the mounting frame (103), the rotating shafts (501) being fixedly connected to driven gears (503) and fan blades (504), the two driven gears (503) of the same group being meshed with a same driving gear (502), and the driving gear (502) being fixedly connected to the output end of the adjacent dual-axis motor (201).

5. The high-efficiency clean coal dewatering screen according to claim 4, characterized in that: The drying structure (5) further comprises a first protective cover (505) fixedly connected to the mounting frame (103); the driving gear (502) and the driven gear (503) are both located inside the adjacent first protective cover (505); the diameter of the driving gear (502) is larger than the diameter of the driven gear (503); two second protective covers (506) are fixedly connected to the first protective cover (505); and the fan blades (504) are located inside the adjacent second protective covers (506).

6. The high-efficiency clean coal dewatering screen according to claim 5, characterized in that: When the fan blades (504) rotate, air enters the interior of the second protective cover (506), then enters the interior of the fume hood (601) through the air duct (603), and finally is discharged through the air outlet cover (602).

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