Coal mine screening equipment with multi-layer structure

Abstract

The utility model discloses coal mine screening equipment with a multilayer structure, and particularly relates to the technical field of coal mine screening, which comprises a screening box, a fixing frame is arranged in the middle of the screening box, a fourth screening plate is arranged at the bottom of the fixing frame, a liquid collecting hopper is arranged at the bottom of the fourth screening plate, and the fourth screening plate and the liquid collecting hopper are fixed in the middle of the screening box. A first sieve plate, a second sieve plate and a third sieve plate are sequentially arranged in the middle of the fixing frame from top to bottom, and two threaded rods are inserted in the middle of the fixing frame. Raw materials can be screened for multiple times through the first screening plate, the second screening plate, the third screening plate and the fourth screening plate, fine screening is achieved, the motor is started to control the rotary disc to sequentially drive the racks to move back and forth, and the threaded rod can be sequentially controlled to drive the fixing frame to move back and forth in the screening box; and vibration of the fixing frame is achieved, so that the screening quality is improved, blockage and accumulation are avoided, and the screening effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of coal mine screening technology, and more specifically, to a multi-layer coal mine screening device. Background Technology

[0002] Coal mining areas are generally divided into underground coal mines and open-pit coal mines. When the coal seam is far from the surface, tunnels are usually dug underground to mine the coal. When the coal seam is close to the surface, the surface soil layer is usually stripped off directly to mine the coal. The raw coal mined from the coal mine needs to go through various processes such as screening and impurity removal before it can be used in coking or chemical enterprises. In the process of coal mining, coal screening is an extremely important step. Its purpose is to classify the mined raw coal according to different particle sizes, quality requirements, etc., so as to facilitate subsequent processing and use.

[0003] Existing coal mine screening equipment typically uses simple coarse and fine screens for screening, and the number of layers is limited. After a long period of screening, coal will cause the filter screen to become clogged and accumulate, making it impossible to achieve fine and efficient screening. Therefore, a multi-layer coal mine screening equipment is proposed. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a multi-layer coal mine screening device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-layer coal mine screening device, including a screening box, a fixed frame in the middle of the screening box, a fourth screen plate at the bottom of the fixed frame, a liquid collection hopper at the bottom of the fourth screen plate, the fourth screen plate and the liquid collection hopper being fixed in the middle of the screening box, and a first screen plate, a second screen plate and a third screen plate arranged sequentially from top to bottom in the middle of the fixed frame, the coal entering the screening box being screened sequentially through the first screen plate, the second screen plate, the third screen plate and the fourth screen plate, thereby achieving multi-layer filtration of raw materials of different sizes and separate output, improving the usage effect;

[0006] Two threaded rods are inserted in the middle of the fixed frame. One end of the threaded rod extends to the outside of the screening box and is fixedly connected to a gear. A rack is provided on one side of the two gears. A limit strip is provided on the side of the rack away from the gear. A connecting rod is fixedly connected to one end of the rack. A limit post is provided at one end of the connecting rod.

[0007] A motor is fixedly connected to one side of the screening box via a bracket. The output end of the motor is connected to a turntable. An annular groove is provided on one side of the turntable. A water spraying and dust suppression mechanism is provided in the middle of the screening box. Starting the motor controls the turntable to rotate. Through the cooperation of the annular groove and the limiting post, the connecting rod is controlled to drive the rack to move back and forth, thereby driving the gear to rotate forward and backward. The limiting strip improves the stability of the rack's movement. The gear drives the threaded rod to rotate, which can drive the fixed frame to vibrate horizontally inside the screening box, thereby improving the screening effect of the first, second, and third screen plates, avoiding blockage. The water spraying and dust suppression mechanism can spray water to suppress dust during screening, improving the usage effect.

[0008] Preferably, the lowest ends of the first screen plate, the second screen plate, and the third screen plate all extend through the screening box to the outside. A conveyor belt is provided on one side of the screening box, located on the side of the third screen plate. The raw materials are easily separated and output individually after being separated by the first screen plate, the second screen plate, and the third screen plate, and are conveniently transported and used by the conveyor belt.

[0009] Preferably, the protruding ends of the first and third screen plates are located on the same side of the screening box, the protruding end of the second screen plate is located on the side of the screening box away from the conveyor belt, and one end of the fourth screen plate extends to the outside and is located on the side of the screening box away from the gear, which facilitates the output of the raw materials discharged from each layer of screening and improves the screening effect.

[0010] Preferably, the threaded rod is threadedly connected to the wall of the fixed frame, the gear meshes with the rack, the limiting post is located in the middle of the annular groove, the annular groove is misaligned with the axis of the turntable, the cross-sectional shape of the limiting strip is set to "L" shape, and the limiting strip is fixed to one side of the screening box. The limiting strip improves the meshing stability of the rack and gear, enhances the driving effect, and through the rotation of the turntable, the rack can be controlled to move back and forth through the cooperation of the annular groove and the limiting post, thus improving the usage effect.

[0011] Preferably, a feed hopper is fixedly connected to the top of the screening box, and a drain pipe is fixedly connected to the bottom of the liquid collection hopper. One end of the drain pipe extends through the screening box to the outside. The feed hopper facilitates feeding, and the drain pipe facilitates the discharge of the liquid after dust settling.

[0012] Preferably, a liquid pump and a water spray tank are fixedly connected to the top of the screening box. Water spray strips are fixedly connected to the top side of the inner cavity of the screening box and both sides of the inner cavity of the fixed frame. The water spray strips correspond to the surfaces of the first screen plate, the second screen plate, and the third screen plate. The output end of the liquid pump is connected to the inner cavity of the water spray tank and the water spray strips. When the liquid pump is started, liquid is input into the interior of the water spray tank and the water spray strips, which can spray water to reduce dust on the raw materials on the first screen plate, the second screen plate, and the third screen plate, thereby improving the screening effect.

[0013] Preferably, stabilizing grooves are provided on both sides of the fixed frame, and stabilizing strips are fixedly connected to the inner sides of the screening box at positions corresponding to the stabilizing grooves. The stabilizing strips are set in the middle of the feed hopper. The stability of the fixed frame vibration is improved by the cooperation of the stabilizing grooves and the stabilizing strips.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] 1. This utility model firstly uses a first screen plate, a second screen plate, a third screen plate, and a fourth screen plate to screen the raw materials multiple times to achieve fine screening. By starting the motor, the turntable is controlled to drive the rack back and forth in sequence, which in turn controls the threaded rod to drive the fixed frame to move back and forth inside the screening box, thereby vibrating the fixed frame, improving the screening quality, avoiding blockage and accumulation, and improving the screening effect.

[0016] 2. This utility model also uses a liquid pump to spray water onto the input raw materials through a water tank and water spray strips to reduce dust, preventing dust from spreading during vibrating screening and thus playing a dust reduction role. The wastewater generated can be discharged in a centralized manner through a liquid collection hopper and a liquid discharge pipe, improving the usage effect. Furthermore, the combination of stabilizing strips and stabilizing troughs can improve the stability of the fixed frame vibration and enhance the usage effect.

[0017] In summary, through the interaction of the above-mentioned multiple functions, raw materials can be screened multiple times to achieve fine screening, improve screening quality, avoid clogging and accumulation, improve screening effect, and facilitate dust reduction. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of this utility model from another angle.

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of this utility model.

[0021] Figure 4 This is a cross-sectional structural diagram of the screening box of this utility model.

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the fixing frame of this utility model.

[0023] Figure 6 This is a schematic diagram of the disassembled connection structure of the motor and gear of this utility model.

[0024] The attached diagram is labeled as follows: 1. Screening box; 2. Fixing frame; 3. First screen plate; 4. Second screen plate; 5. Third screen plate; 6. Fourth screen plate; 7. Liquid collection hopper; 8. Drain pipe; 9. Threaded rod; 10. Gear; 11. Rack; 12. Limiting strip; 13. Connecting rod; 14. Limiting post; 15. Motor; 16. Turntable; 17. Annular groove; 18. Liquid pump; 19. Water spray box; 20. Water spray strip; 21. Conveyor belt; 22. Feed hopper; 23. Stabilizing strip; 24. Stabilizing trough. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] As attached Figure 1-6 The multi-layer coal screening equipment shown includes a screening box 1, a fixed frame 2 in the middle of the screening box 1, a fourth screen plate 6 at the bottom of the fixed frame 2, and a liquid collection hopper 7 at the bottom of the fourth screen plate 6. The fourth screen plate 6 and the liquid collection hopper 7 are fixed in the middle of the screening box 1. From top to bottom, a first screen plate 3, a second screen plate 4, and a third screen plate 5 are arranged in the middle of the fixed frame 2. The coal entering the screening box 1 is screened by passing through the first screen plate 3, the second screen plate 4, the third screen plate 5, and the fourth screen plate 6 in sequence, so as to realize multi-layer filtration of raw materials of different sizes and separate output, thereby improving the use effect.

[0027] Two threaded rods 9 are inserted in the middle of the fixed frame 2. One end of the threaded rod 9 extends to the outside of the screening box 1 and is fixedly connected to a gear 10. A rack 11 is provided on the opposite side of the two gears 10. A limit bar 12 is provided on the side of the rack 11 away from the gear 10. A connecting rod 13 is fixedly connected to one end of the rack 11. A limit post 14 is provided at one end of the connecting rod 13.

[0028] A motor 15 is fixedly connected to one side of the screening box 1 via a bracket. The output end of the motor 15 is connected to a turntable 16. An annular groove 17 is provided on one side of the turntable 16. A water spraying and dust suppression mechanism is provided in the middle of the screening box 1. When the motor 15 is started, the turntable 16 is rotated. Through the cooperation of the annular groove 17 and the limiting post 14, the connecting rod 13 is controlled to drive the rack 11 to move back and forth, thereby driving the gear 10 to rotate back and forth. The limiting strip 12 improves the stability of the rack 11's movement. The gear 10 drives the threaded rod 9 to rotate, which can drive the fixed frame 2 to vibrate horizontally inside the screening box 1, thereby improving the screening effect of the first screen plate 3, the second screen plate 4, and the third screen plate 5, avoiding clogging. Through the water spraying and dust suppression mechanism, water can be sprayed to suppress dust during screening, improving the usage effect.

[0029] As attached Figure 1-6As shown, the lowest ends of the first screen plate 3, the second screen plate 4, and the third screen plate 5 all extend through the screening box 1 to the outside. A conveyor belt 21 is provided on one side of the screening box 1, which is located on the same side as the third screen plate 5. The protruding ends of the first screen plate 3 and the third screen plate 5 are located on the same side of the screening box 1. The protruding end of the second screen plate 4 is located on the side of the screening box 1 away from the conveyor belt 21. One end of the fourth screen plate 6 extends to the outside and is located on the side of the screening box 1 away from the gear 10. The threaded rod 9 is threadedly connected to the wall of the fixed frame 2. The gear 10 meshes with the rack 11. The limiting post 14 A limiting strip 12 is positioned in the middle of an annular groove 17, which is offset from the axis of the turntable 16. The limiting strip 12 has an "L" shaped cross-section and is fixed to one side of the screening box 1. A feed hopper 22 is fixedly connected to the top of the screening box 1, and a drain pipe 8 is fixedly connected to the bottom of the liquid collection hopper 7. One end of the drain pipe 8 extends through the screening box 1 to the outside. A liquid pump 18 and a water spray box 19 are fixedly connected to the top of the screening box 1. Water spray strips 20 are fixedly connected to the top side of the inner cavity of the screening box 1 and both sides of the inner cavity of the fixing frame 2. The water spray strips 20 are connected to the first... The surfaces of sieve plate 3, second sieve plate 4, and third sieve plate 5 correspond to each other. The output end of liquid pump 18 is connected to the inner cavity of water spray box 19 and water spray strip 20. Stabilizing grooves 24 are provided on both sides of fixed frame 2. Stabilizing strips 23 are fixedly connected to the inner cavities of screening box 1 at positions corresponding to the stabilizing grooves 24. Stabilizing strips 23 are set in the middle of feed hopper 22. After the raw materials are separated by first sieve plate 3, second sieve plate 4, and third sieve plate 5, they can be easily output individually and transported by conveyor belt 21. This facilitates the output of raw materials discharged from each layer of screening, improving efficiency. The high screening effect is achieved by improving the meshing stability of the rack 11 and gear 10 through the limiting strip 12, thereby enhancing the driving effect. The rotation of the turntable 16, along with the cooperation between the annular groove 17 and the limiting post 14, controls the back-and-forth movement of the rack 11, improving the usage effect. The start of the liquid pump 18 inputs liquid into the spray tank 19 and the spray bar 20, which can spray water to reduce dust on the raw materials on the first screen plate 3, the second screen plate 4, and the third screen plate 5, improving the screening effect. The cooperation between the stabilizing groove 24 and the stabilizing strip 23 improves the vibration stability of the fixed frame 2.

[0030] The working principle of this utility model is as follows: When in use, the raw material is fed into the screening box 1 through the feed hopper 22 and will first fall on the top of the first screen plate 3. At the same time as the raw material is added, the liquid pump 18 is started to spray liquid through the water spray box 19 and the water spray strip 20 to reduce dust. At the same time, the motor 15 is started to control the fixed frame 2 to vibrate inside the screening box 1 in sequence, thereby controlling the first screen plate 3, the second screen plate 4, and the third screen plate 5 to vibrate synchronously, thereby improving the vibration screening effect. The screened raw material is automatically discharged through the extended ends of the first screen plate 3, the second screen plate 4, and the third screen plate 5.

[0031] Some fine impurities and raw materials fall onto the fourth sieve plate 6. When filtering the liquid in the middle of the raw materials, the liquid falls into the middle of the liquid collection hopper 7. Fine impurities and raw materials are discharged through the extended end of the fourth sieve plate 6, realizing multi-stage layered filtration and improving the filtration effect.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-layer coal mine screening device, comprising a screening box (1), characterized in that: A fixed frame (2) is provided in the middle of the screening box (1), a fourth sieve plate (6) is provided at the bottom of the fixed frame (2), a liquid collection hopper (7) is provided at the bottom of the fourth sieve plate (6), the fourth sieve plate (6) and the liquid collection hopper (7) are fixed in the middle of the screening box (1), and a first sieve plate (3), a second sieve plate (4) and a third sieve plate (5) are arranged in the middle of the fixed frame (2) from top to bottom. Two threaded rods (9) are inserted in the middle of the fixed frame (2). One end of the threaded rod (9) extends to the outside of the screening box (1) and is fixedly connected to a gear (10). A rack (11) is provided on the opposite side of the two gears (10). A limit bar (12) is provided on the side of the rack (11) away from the gear (10). A connecting rod (13) is fixedly connected to one end of the rack (11). A limit post (14) is provided at one end of the connecting rod (13). A motor (15) is fixedly connected to one side of the screening box (1) via a bracket. The output end of the motor (15) is connected to a turntable (16). An annular groove (17) is provided on one side of the turntable (16). A water spraying and dust suppression mechanism is provided in the middle of the screening box (1).

2. The multi-layer coal mine screening equipment according to claim 1, characterized in that: The lowest ends of the first screen plate (3), the second screen plate (4), and the third screen plate (5) all extend through the screening box (1) to the outside. A conveyor belt (21) is provided on one side of the screening box (1) located on the side of the third screen plate (5).

3. The multi-layer coal mine screening equipment according to claim 1, characterized in that: The protruding ends of the first screen plate (3) and the third screen plate (5) are located on the same side of the screening box (1), the protruding end of the second screen plate (4) is located on the side of the screening box (1) away from the conveyor belt (21), and one end of the fourth screen plate (6) extends to the outside and is located on the side of the screening box (1) away from the gear (10).

4. The multi-layer coal mine screening equipment according to claim 1, characterized in that: The threaded rod (9) is threadedly connected to the wall of the fixed frame (2), the gear (10) meshes with the rack (11), the limiting post (14) is set in the middle of the annular groove (17), the annular groove (17) is misaligned with the axis of the turntable (16), the cross-sectional shape of the limiting strip (12) is set to "L" shape, and the limiting strip (12) is fixed on one side of the screening box (1).

5. A multi-layer coal mine screening device according to claim 1, characterized in that: The top of the screening box (1) is fixedly connected to a feed hopper (22), and the bottom of the liquid collection hopper (7) is fixedly connected to a drain pipe (8). One end of the drain pipe (8) extends through the screening box (1) to the outside.

6. A multi-layer coal mine screening device according to claim 1, characterized in that: A liquid pump (18) and a water spray tank (19) are fixedly connected to the top of the screening box (1). Water spray strips (20) are fixedly connected to the top side of the inner cavity of the screening box (1) and the two sides of the inner cavity of the fixed frame (2). The water spray strips (20) correspond to the surfaces of the first sieve plate (3), the second sieve plate (4), and the third sieve plate (5). The output end of the liquid pump (18) is connected to the inner cavity of the water spray tank (19) and the water spray strips (20).

7. A multi-layer coal mine screening device according to claim 1, characterized in that: The fixed frame (2) has stabilizing grooves (24) on both sides. The inner cavity of the screening box (1) is fixedly connected with stabilizing strips (23) at positions corresponding to the stabilizing grooves (24). The stabilizing strips (23) are set in the middle of the feed hopper (22).

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