Rapid coal gangue screening device

Abstract

The invention relates to the technical field of coal gangue, and provides a coal gangue rapid screening device which comprises a supporting frame, and a protective shell is fixedly connected to the top of the supporting frame; a crushing device is arranged at the top of the supporting frame and comprises a motor, the motor is fixedly connected to the side face of the protective shell, an output shaft of the motor is fixedly connected with a rotating rod, the circumferential face of the rotating rod is fixedly connected with a chain wheel, and a chain is arranged on the side face of the chain wheel; and crushing rollers are fixedly connected to the circumferential surface of the rotating rod. By means of the technical scheme, the problems that in the prior art, when coal gangue is crushed, the effect that the pressing plate reciprocates to extrude the coal gangue on the top of the crushing roller is difficult to achieve, the situation that the crushing effect is affected due to the fact that the coal gangue is too large to be clamped is difficult to prevent, the situation that crushing equipment is clamped is difficult to avoid, and the production efficiency is reduced are solved.

Description

Technical Field

[0001] The invention relates to the technical field of coal gangue, and in particular to a coal gangue rapid screening device. Background Art

[0002] Gangue screening device is mainly used for gangue separation in the process of coal mining. It is a key equipment to improve coal quality, reduce environmental pollution and resource waste. The working principle of gangue screening device is mainly to utilize the different physical properties of materials, such as specific gravity, shape, hardness, etc., to separate them through screening machinery. Common screening machinery includes vibrating screen, drum screen, wind screen, etc. These equipment use different screening methods, such as vibration, rotation, airflow, etc., to achieve effective separation of coal and gangue.

[0003] According to a disclosed coal gangue rapid screening device (publication number: CN118513230B), it includes a conical screening barrel, a feed pipe assembly is provided at the narrow end of the conical screening barrel, a material blocking cover is rotatably connected to the open end of the conical screening barrel, legs are provided at both ends of the material blocking cover, a support assembly is provided between the feed pipe assembly and the conical screening barrel, which can make the conical screening barrel vibrate when rotating, and a buffer assembly is provided between the material blocking cover and the legs, which can make the material blocking cover adapt to the vibration of the conical screening barrel. However, in the above-mentioned device, through the cooperation of the feed pipe assembly, the support assembly and the buffer assembly, it is difficult to achieve the effect of crushing the coal gangue while the pressure plate reciprocates to squeeze the coal gangue on the top of the crushing roller, it is difficult to prevent the coal gangue from being stuck due to excessive size and affecting the crushing effect, it is not conducive to preventing the coal gangue from getting stuck during the crushing process, and it is difficult to avoid the crushing equipment from getting stuck, which reduces the production efficiency and needs to be improved. Summary of the invention

[0004] The present invention provides a coal gangue rapid screening device, which solves the problems raised in the above documents.

[0005] The technical solution of the present invention is as follows: A coal gangue rapid screening device comprises a support frame, the top of which is fixedly connected with a protective shell; A crushing device is provided on the top of the support frame, and the crushing device includes a motor, the motor is fixedly connected to the side of the protective shell, the output shaft of the motor is fixedly connected to a rotating rod, the circumferential surface of the rotating rod is fixedly connected to a sprocket, a chain is provided on the side of the sprocket, the circumferential surface of the rotating rod is fixedly connected to a crushing roller, the circumferential surface of the rotating rod is rotatably connected to a belt, the rotating rod is connected to a rotating rod through a belt drive, the circumferential surface of the rotating rod is fixedly connected to a half gear, a rotating shaft passes through the side of the protective shell, the circumferential surface of the rotating shaft is fixedly connected to a gear, and the circumferential surface of the rotating shaft is fixedly connected to a pressure plate.

[0006] A torsion spring is fixedly connected to the circumferential surface of the rotating shaft, and one end of the torsion spring away from the rotating shaft is fixedly connected to the side of the protective shell. The design of the torsion spring can make the pressure plate automatically reset, so that the pressure plate can reciprocate to squeeze the coal gangue on the top of the crushing roller, which helps to prevent the coal gangue from getting stuck during the crushing process, especially for larger particles of coal gangue, avoiding the jamming of the crushing equipment and improving production efficiency.

[0007] The initial state of the torsion spring is a relaxed state, the side of the half gear with the tooth block meshes with the side of the gear, the side of the sprocket meshes with the side of the chain, and the design of the half gear can make the gear rotate. The elastic reset effect of the torsion spring ensures that the pressure plate can be effectively reset and continue to work. This self-regulating function can reduce manual intervention, reduce labor costs, and improve the adaptability of the equipment.

[0008] A screening device is provided on the top of the support frame, and the screening device includes a connecting belt, which is provided on the circumferential surface of a rotating rod, a side surface of the support frame is rotatably connected to a rotating shaft, a sprocket is fixedly connected to the circumferential surface of the rotating shaft, a belt A is rotatably connected to the circumferential surface of the rotating shaft, and the rotating shaft is connected to a support rod through the belt A transmission, a side surface of the support rod is rotatably connected to a connecting rod, a side surface of the connecting rod is rotatably connected to a round rod, a circumferential surface of the round rod is rotatably connected to a long rod, an end of the long rod away from the round rod is rotatably connected to a cylinder, both ends of the cylinder are rotatably connected to fixed plates, and a sieve disc is fixedly connected to the top of the fixed plate.

[0009] The top of the sieve plate is fixedly connected to a fixed block, the top of the fixed block is fixedly connected to a spring, the end of the spring away from the fixed block is fixedly connected to a positioning block, the top of the positioning block is fixedly connected to the side of the protective shell, and the design of the spring can make the sieve plate vibrate continuously. The continuous vibration of the sieve plate ensures that the coal gangue particles can be evenly distributed on the sieve, avoiding the problems of accumulation and uneven screening.

[0010] The initial state of the spring is a relaxed state. The number of the connecting rods is set to two, and they are symmetrical with each other along the vertical center axis of the support rod. The design of the support rod can make the sieve plate vibrate. By maintaining the vibration of the sieve plate, the coal gangue can pass through the screen quickly, which can avoid blockage and accumulation of materials during the screening process and improve the continuity and stability of production.

[0011] A feeding device is provided on the top of the support frame, and the feeding device includes a rotating rod A, the rotating shaft is transmission-connected to the rotating rod A through a belt A, the circumferential surface of the rotating rod A is fixedly connected with a helical gear, the side of the protective shell is rotatably connected with the rotating rod A, the circumferential surface of the rotating rod A is fixedly connected with a bevel gear, the circumferential surface of the rotating rod A is fixedly connected with a half gear A, the side of the protective shell is penetrated by a rotating shaft A, the circumferential surface of the rotating shaft A is fixedly connected with a feeding plate, and the circumferential surface of the rotating shaft A is fixedly connected with a gear disk.

[0012] The side of the gear plate meshes with the side of the half gear A with the tooth block, and the side of the helical gear meshes with the side of the bevel gear. The design of the helical gear and the bevel gear can make the rotating rod A rotate, thereby rotating the unloading plate, which can prevent material from splashing.

[0013] A return torsion spring is fixedly connected to the circumferential surface of the rotating shaft A, and one end of the return torsion spring away from the rotating shaft A is fixedly connected to the side of the protective shell. The design of the return spring can make the blanking plate rotate continuously, and the reciprocating motion of the blanking plate can help to evenly flatten the material on the top of the sieve plate.

[0014] The initial state of the reset torsion spring is a relaxed state. The number of the blanking plates is set to two, and they are symmetrical to each other along the vertical center axis of the protective shell. The blanking plates are continuously reset by the elastic reset function of the reset torsion spring, reducing manual intervention.

[0015] The working principle and beneficial effects of the present invention are: 1. In the present invention, the force of the rotating rod driven by the motor cooperates with the crushing roller, half gear and rotating shaft components in the crushing device, so that the pressure plate is driven to rotate by the rotation of the rotating shaft. When the side with the tooth block of the half gear is separated from the side of the gear, the rotating shaft is reset by the elastic force of the torsion spring, so that the reciprocating movement of the pressure plate squeezes the coal gangue on the top of the crushing roller while crushing the coal gangue, preventing the coal gangue from being stuck due to excessive size and affecting the crushing effect, and helping to prevent the coal gangue from getting stuck during the crushing process, especially for larger particles of coal gangue, avoiding the jamming of the crushing equipment and improving production efficiency.

[0016] 2. In the present invention, the force of the chain wheel driven by the rotation of the rotating rod cooperates with the components such as the fixed plate, the positioning block and the long rod in the screening device, so that the connecting rod is driven to rotate along the supporting rod by the rotation of the supporting rod, and then the round rod is driven to rotate by the connecting rod, and the long rod is driven to rotate by the rotation of the round rod, thereby pulling the cylinder to move, and the fixed plate is driven to move by the displacement of the cylinder, so that the screen plate is continuously vibrated and the screening speed is accelerated, which helps to accelerate the screening process of coal gangue, reduces the residence time of coal gangue on the screen plate, thereby improving the screening efficiency, and can quickly separate coal gangue of different particle sizes.

[0017] 3. In the present invention, the force of the rotating rod A driven by the rotation of the connecting belt cooperates with the unloading plate, the rotating shaft A and the reset torsion spring and other components in the unloading device, so that the unloading plate is driven to rotate by the rotation of the rotating shaft A. When the side with the tooth block of the half gear A is separated from the gear plate, the rotating shaft A is reset by the elastic force of the reset torsion spring, so that the unloading plate keeps reciprocating and the material on the top of the sieve plate is flattened, which helps to achieve uniform distribution of materials during the screening process, improve the screening effect and accuracy, and reduce blind spots or missed screening. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Figure 1 It is a schematic diagram of the three-dimensional appearance structure of the present invention; Figure 2 It is a three-dimensional side view structural schematic diagram of the sieve plate of the present invention; Figure 3 It is a three-dimensional side view structural schematic diagram of the motor of the present invention; Figure 4 It is a three-dimensional side view structural schematic diagram of the gear of the present invention; Figure 5 It is a three-dimensional enlarged structural schematic diagram of the connecting belt of the present invention; Figure 6 It is a three-dimensional bottom-up structural schematic diagram of the long rod of the present invention; Figure 7 It is a three-dimensional enlarged structural schematic diagram of the blanking plate of the present invention; Figure 8 It is a three-dimensional enlarged structural schematic diagram of the helical gear of the present invention.

[0020] In the figure: 101, support frame; 102, protective shell; 2, crushing device; 201, motor; 202, sprocket; 203, chain; 204, rotating rod; 205, crushing roller; 206, belt; 207, rotating rod; 208, half gear; 209, rotating shaft; 210, gear; 211, pressure plate; 212, torsion spring; 3, screening device; 301, connecting belt; 302, chain wheel; 303, rotating shaft; 304, belt A; 305 , support rod; 306, connecting rod; 307, round rod; 308, long rod; 309, cylinder; 310, fixed plate; 311, sieve plate; 312, fixed block; 313, spring; 314, positioning block; 4, unloading device; 401, rotating rod A; 402, bevel gear; 403, rotating rod A; 404, bevel gear; 405, half gear A; 406, gear plate; 407, rotating shaft A; 408, reset torsion spring; 409, unloading plate. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1 like Figure 1 to Figure 8 As shown, this embodiment proposes a coal gangue rapid screening device, including a support frame 101, and a protective shell 102 is fixedly connected to the top of the support frame 101; A crushing device 2 is arranged on the top of the support frame 101, and the crushing device 2 includes a motor 201, which is fixedly connected to the side of the protective shell 102, and the output shaft of the motor 201 is fixedly connected to a rotating rod 204, and the circumferential surface of the rotating rod 204 is fixedly connected to a sprocket 202, and a chain 203 is arranged on the side of the sprocket 202, and the circumferential surface of the rotating rod 204 is fixedly connected to a crushing roller 205, and the circumferential surface of the rotating rod 204 is rotatably connected to a belt 206, and the rotating rod 204 is connected to a rotating rod 207 through the belt 206, and the circumferential surface of the rotating rod 207 is fixedly connected to a half gear 208, and a rotating shaft 209 passes through the side of the protective shell 102, and the circumferential surface of the rotating shaft 209 is fixedly connected to a gear 210, and the circumferential surface of the rotating shaft 209 is fixedly connected to a pressure plate 211.

[0023] A torsion spring 212 is fixedly connected to the circumferential surface of the rotating shaft 209, and one end of the torsion spring 212 away from the rotating shaft 209 is fixedly connected to the side of the protective shell 102. The design of the torsion spring 212 can make the pressure plate 211 automatically reset, so that the pressure plate 211 can reciprocate to squeeze the coal gangue on the top of the crushing roller 205, which helps to prevent the coal gangue from getting stuck during the crushing process, especially for larger particles of coal gangue, avoiding the jamming of the crushing equipment and improving production efficiency.

[0024] The initial state of the torsion spring 212 is a relaxed state. The side of the half gear 208 with the tooth block is meshed with the side of the gear 210, and the side of the sprocket 202 is meshed with the side of the chain 203. The design of the half gear 208 can make the gear 210 rotate. Through the elastic reset effect of the torsion spring 212, it is ensured that the pressure plate 211 can be effectively reset and continue to work. This self-regulating function can reduce manual intervention, reduce labor costs, and improve the adaptability of the equipment.

[0025] A screening device 3 is arranged on the top of the support frame 101, and the screening device 3 includes a connecting belt 301, which is arranged on the circumferential surface of the rotating rod 204, a rotating shaft 303 is rotatably connected to the side of the support frame 101, a sprocket wheel 302 is fixedly connected to the circumferential surface of the rotating shaft 303, a belt A304 is rotatably connected to the circumferential surface of the rotating shaft 303, the rotating shaft 303 is connected to the supporting rod 305 through the belt A304, the supporting rod 305 is rotatably connected to the side of the connecting rod 306, the connecting rod 306 is rotatably connected to the side of the round rod 307, the circumferential surface of the round rod 307 is rotatably connected to the long rod 308, the end of the long rod 308 away from the round rod 307 is rotatably connected to the cylinder 309, the two ends of the cylinder 309 are rotatably connected to the fixed plate 310, and the top of the fixed plate 310 is fixedly connected to the sieve plate 311.

[0026] The top of the sieve plate 311 is fixedly connected to a fixed block 312, the top of the fixed block 312 is fixedly connected to a spring 313, the end of the spring 313 away from the fixed block 312 is fixedly connected to a positioning block 314, the top of the positioning block 314 is fixedly connected to the side of the protective shell 102, and the design of the spring 313 can make the sieve plate 311 vibrate continuously. The continuous vibration of the sieve plate 311 ensures that the coal gangue particles can be evenly distributed on the sieve, avoiding the problems of accumulation and uneven screening.

[0027] The initial state of the spring 313 is a relaxed state. The number of connecting rods 306 is set to two, and they are symmetrical with each other along the vertical center axis of the support rod 305. The design of the support rod 305 can make the sieve plate 311 vibrate. By maintaining the vibration of the sieve plate 311, the coal gangue can pass through the screen quickly, which can avoid blockage and accumulation of materials during the screening process and improve the continuity and stability of production.

[0028] In this embodiment, the present application drives the rotating rod 204 to rotate through the motor 201, and then drives the sprocket 202 to rotate through the rotating rod 204, and drives the chain 203 to rotate through the rotation of the sprocket 202, and then drives another sprocket 202 to rotate through the rotation of the chain 203, and drives the crushing roller 205 to rotate through the rotation of the rotating rod 204, thereby achieving the effect of preliminary crushing of the coal gangue, and drives the belt 206 to rotate through the rotation of the rotating rod 204, and then drives the rotating rod 207 to rotate through the rotation of the belt 206, and drives the semi-gear 207 to rotate through the rotation of the rotating rod 207. 208 rotates, and when the side with the tooth block of the half gear 208 meshes with the gear 210, the gear 210 is driven to rotate by the half gear 208, and the rotation of the gear 210 drives the rotating shaft 209 to rotate, and the rotation of the rotating shaft 209 drives the pressure plate 211 to rotate. When the side with the tooth block of the half gear 208 is separated from the side of the gear 210, the rotating shaft 209 is reset by the elastic force of the torsion spring 212, so that the reciprocating motion of the pressure plate 211 can squeeze the coal gangue on the top of the crushing roller 205, so as to prevent the coal gangue from being too large to get stuck in the crushing roller 205 and affect the crushing effect.

[0029] The sprocket wheel 302 is rotated by rotating the rotating rod 204, and the connecting belt 301 is rotated by rotating the sprocket wheel 302, and the other sprocket wheel 302 is rotated by rotating the connecting belt 301, and the rotating shaft 303 is rotated by rotating the sprocket wheel 302, and the belt A304 is rotated by rotating the rotating shaft 303, and the support rod 305 is rotated by rotating the belt A304, and the connecting rod 306 is rotated along the support rod 305 by rotating the supporting rod 305, and the round rod 307 is rotated by the connecting rod 306, and the long rod 308 is rotated by rotating the round rod 307, thereby pulling the cylinder 309 to move, and the fixed plate 310 is moved by the displacement of the cylinder 309, so that the sieve plate 311 vibrates continuously and the screening speed is accelerated.

[0030] Example 2 like Figure 1 to Figure 8 As shown, based on the same concept as the above-mentioned embodiment 1, a second embodiment is also proposed, a feeding device 4 is arranged on the top of the support frame 101, and the feeding device 4 includes a rotating rod A401, a rotating shaft 303 is transmission-connected to the rotating rod A401 through a belt A304, a bevel gear 402 is fixedly connected to the circumferential surface of the rotating rod A401, a rotating rod A403 is rotatably connected to the side of the protective shell 102, a bevel gear 404 is fixedly connected to the circumferential surface of the rotating rod A403, a half gear A405 is fixedly connected to the circumferential surface of the rotating rod A403, a rotating shaft A407 passes through the side of the protective shell 102, a feeding plate 409 is fixedly connected to the circumferential surface of the rotating shaft A407, and a gear disk 406 is fixedly connected to the circumferential surface of the rotating shaft A407.

[0031] The side of the gear plate 406 meshes with the side of the half gear A405 with the tooth block, and the side of the helical gear 402 meshes with the side of the bevel gear 404. The design of the helical gear 402 and the bevel gear 404 can make the rotating rod A403 rotate, thereby rotating the unloading plate 409, which can prevent material from splashing out.

[0032] A return torsion spring 408 is fixedly connected to the circumferential surface of the rotating shaft A407, and one end of the return torsion spring 408 away from the rotating shaft A407 is fixedly connected to the side of the protective shell 102. The design of the return torsion spring 408 can make the unloading plate 409 rotate continuously, and the reciprocating motion of the unloading plate 409 can help to evenly flatten the material on the top of the sieve plate 311.

[0033] The initial state of the reset torsion spring 408 is a relaxed state. The number of blanking plates 409 is set to two, and they are symmetrical to each other along the vertical center axis of the protective shell 102. The elastic reset function of the reset torsion spring 408 allows the blanking plate 409 to be continuously reset, reducing manual intervention.

[0034] In this embodiment, the rotation of the connecting belt 301 drives the rotating rod A401 to rotate, and then the rotation of the rotating rod A401 drives the bevel gear 402 to rotate, and the rotation of the bevel gear 402 drives the rotating rod A403 to rotate, and then the rotation of the rotating rod A403 drives the bevel gear 404 to rotate, and the rotation of the rotating rod A403 drives the half gear A405 to rotate. When the side with the tooth block of the half gear A405 engages with the gear plate 406, the half gear A405 drives the gear plate 406 to rotate, and then the rotation of the gear plate 406 drives the rotating shaft A407 to rotate, and the rotation of the rotating shaft A407 drives the unloading plate 409 to rotate. When the side with the tooth block of the half gear A405 is separated from the gear plate 406, the rotating shaft A407 is reset by the elastic force of the reset torsion spring 408, so that the unloading plate 409 continuously reciprocates to pave the material on the top of the sieve plate 311. The design of the unloading plate 409 can also prevent the material from splashing out.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rapid screening device for coal gangue, characterized in that: It comprises a support frame (101), the top of the support frame (101) being fixedly connected to a protective shell (102); A crushing device (2) is arranged on the top of the support frame (101), and the crushing device (2) comprises a motor (201), the motor (201) is fixedly connected to the side of the protective shell (102), the output shaft of the motor (201) is fixedly connected to a rotating rod (204), the circumferential surface of the rotating rod (204) is fixedly connected to a sprocket (202), the side of the sprocket (202) is provided with a chain (203), and the circumferential surface of the rotating rod (204) is fixedly connected to a crushing roller ( 205), the circumferential surface of the rotating rod (204) is rotatably connected to a belt (206), the rotating rod (204) is transmission-connected to a rotating rod (207) via the belt (206), the circumferential surface of the rotating rod (207) is fixedly connected to a half gear (208), a rotating shaft (209) passes through the side surface of the protective shell (102), the circumferential surface of the rotating shaft (209) is fixedly connected to a gear (210), and the circumferential surface of the rotating shaft (209) is fixedly connected to a pressure plate (211).

2. A rapid screening device for coal gangue according to claim 1, characterized in that: A torsion spring (212) is fixedly connected to the circumferential surface of the rotating shaft (209), and one end of the torsion spring (212) away from the rotating shaft (209) is fixedly connected to the side surface of the protective shell (102).

3. A rapid screening device for coal gangue according to claim 2, characterized in that: The initial state of the torsion spring (212) is a relaxed state, the side of the half gear (208) with the tooth block is meshed with the side of the gear (210), and the side of the sprocket (202) is meshed with the side of the chain (203).

4. A rapid screening device for coal gangue according to claim 3, characterized in that: A screening device (3) is arranged on the top of the support frame (101), and the screening device (3) comprises a connecting belt (301), the connecting belt (301) is arranged on the circumferential surface of the rotating rod (204), a rotating shaft (303) is rotatably connected to the side of the support frame (101), a sprocket wheel (302) is fixedly connected to the circumferential surface of the rotating shaft (303), a belt A (304) is rotatably connected to the circumferential surface of the rotating shaft (303), and the rotating shaft (303) is connected to the rotating shaft (303) through the transmission of the belt A (304). A support rod (305) is provided, the side surface of the support rod (305) is rotatably connected to a connecting rod (306), the side surface of the connecting rod (306) is rotatably connected to a round rod (307), the circumferential surface of the round rod (307) is rotatably connected to a long rod (308), one end of the long rod (308) away from the round rod (307) is rotatably connected to a cylinder (309), both ends of the cylinder (309) are rotatably connected to a fixing plate (310), and the top of the fixing plate (310) is fixedly connected to a sieve plate (311).

5. A rapid screening device for coal gangue according to claim 4, characterized in that: The top of the sieve plate (311) is fixedly connected to a fixing block (312), the top of the fixing block (312) is fixedly connected to a spring (313), one end of the spring (313) away from the fixing block (312) is fixedly connected to a positioning block (314), and the top of the positioning block (314) is fixedly connected to the side of the protective shell (102).

6. A rapid screening device for coal gangue according to claim 5, characterized in that: The initial state of the spring (313) is a relaxed state, and the number of the connecting rods (306) is set to two, and they are symmetrical to each other along the vertical center axis of the support rod (305).

7. A rapid screening device for coal gangue according to claim 6, characterized in that: A feeding device (4) is arranged on the top of the support frame (101), the feeding device (4) comprising a rotating rod A (401), the rotating shaft (303) being transmission-connected to the rotating rod A (401) via a belt A (304), the circumferential surface of the rotating rod A (401) being fixedly connected to a bevel gear (402), the side surface of the protective shell (102) being rotatably connected to the rotating rod A (403), the circumferential surface of the rotating rod A (403) being fixedly connected to a bevel gear (404), the circumferential surface of the rotating rod A (403) being fixedly connected to a half gear A (405), the side surface of the protective shell (102) being penetrated by a rotating shaft A (407), the circumferential surface of the rotating shaft A (407) being fixedly connected to a feeding plate (409), and the circumferential surface of the rotating shaft A (407) being fixedly connected to a gear plate (406).

8. A rapid screening device for coal gangue according to claim 7, characterized in that: The side surface of the gear plate (406) meshes with the side of the half gear A (405) having the tooth block, and the side surface of the helical gear (402) meshes with the side surface of the bevel gear (404).

9. A rapid screening device for coal gangue according to claim 8, characterized in that: A return torsion spring (408) is fixedly connected to the circumferential surface of the rotation axis A (407), and one end of the return torsion spring (408) away from the rotation axis A (407) is fixedly connected to the side surface of the protective shell (102).

10. A rapid screening device for coal gangue according to claim 9, characterized in that: The initial state of the return torsion spring (408) is a relaxed state, and the number of the blanking plates (409) is set to two, and they are symmetrical to each other along the vertical center axis of the protective shell (102).

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