A special coal feeder for multi-channel raw coal bunker

Abstract

The present invention relates to the field of coal transportation, and specifically to a special coal feeder for multiple-way separation of raw coal bins. It comprises a coal feeding bin provided with a blanking plate, a slag collecting hopper at the lower end, and a spreading mechanism beside the inlet; the spreading mechanism comprises a cleaning brush, a spreading roller and a cutter, and a screening belt is further provided at the end of the blanking plate away from the inlet, a roller belt composed of a plurality of guide rollers is provided on the side of the screening belt principle inlet, a feeding conveyor belt is provided on the side of the roller belt away from the screening belt, and a water pipe for spraying water mist is provided above the guide roller. When the device is in operation, coal blocks enter through the blanking plate, are then cut by the cutter and flattened by the spreading roller, and the coal powder is separated into the slag collecting hopper through the screening belt. The coal blocks on the roller belt are sprayed with water by a water pipe and then sent to the coal mill via the feeding conveyor belt. This device can effectively solve the problems of coal block agglomeration, coal powder separation, coal block self-ignition and dust, improve the coal block processing efficiency and equipment operation stability, and is widely applicable to the field of coal transportation.

Description

Technical Field

[0001] The present invention relates to the field of coal transportation, in particular to a special coal feeder for a raw coal bunker with multiple compartments. Background Art

[0002] In many coal-based industries, such as thermal power generation and industrial boilers, dedicated feeders for raw coal bunkers with multiple channels are key equipment in the coal transportation process. Their performance directly impacts the stability and efficiency of subsequent production processes. Currently, traditional raw coal bunker feeders have numerous practical issues.

[0003] First, regarding coal lump handling, traditional coal feeders often lack effective mechanisms for handling coal lumps. Coal lumps are prone to clumping during storage and transportation, especially due to factors such as humidity and particle size. Large coal lumps entering the pulverizer not only significantly reduce grinding efficiency and increase equipment wear, but can also cause pulverizer blockage, impacting the continuity of the entire production process. Furthermore, the uneven distribution of coal lumps can lead to unstable combustion, reduced combustion efficiency, increased fuel consumption, and increased pollutant emissions.

[0004] Secondly, conventional coal feeders typically lack dedicated separation mechanisms for pulverized coal. Small particles of pulverized coal generated during coal transport and handling enter downstream equipment along with the coal. These particles not only accumulate in the conveying pipeline, increasing the risk of blockage, but also affect combustion uniformity, leading to incomplete combustion and reduced energy efficiency.

[0005] Furthermore, existing coal feeders are inadequate in preventing spontaneous combustion of coal blocks and controlling dust. For flammable coal, frictional heat and backlogs between coal blocks during transportation can easily lead to localized temperature increases, prematurely releasing combustible gases and causing spontaneous combustion, posing a serious threat to equipment and production safety. Furthermore, for dry coal, the collision of coal blocks generates large amounts of dust, which not only affects the working environment but can also cause safety incidents such as dust explosions. Furthermore, dust increases equipment maintenance costs and shortens its lifespan.

[0006] Therefore, it is necessary for us to design a special coal feeder for multi-channel raw coal bunkers. Summary of the Invention

[0007] Based on this, it is necessary to provide a special coal feeder for multiple-channel raw coal bunkers to address the existing technical problems.

[0008] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0009] A special coal feeder for raw coal bunker with multiple channels, comprising:

[0010] The entrance is equipped with a coal feeding bin with a blanking plate, the lower end of the coal feeding bin is equipped with a slag collecting hopper, and the side of the blanking plate is equipped with a spreading mechanism for leveling the coal blocks;

[0011] The balancing mechanism includes two cleaning brushes with the same direction, with pinions coaxially arranged at both ends of the cleaning brushes, a balancing roller rotating below the cleaning brushes, and a cutter for cutting the coal blocks arranged on the side of the inlet close to the balancing roller;

[0012] A screening belt is provided at the end of the blanking plate away from the inlet. A plurality of screen holes are formed on the screening belt. The upper end of the screening belt abuts against the evenly spreading roller.

[0013] A roller belt composed of several guide rollers is provided on the side of the screen belt away from the blanking plate, a water pipe loaded with multiple atomizers is provided above the guide roller, and a loading conveyor belt is provided on the side of the roller belt close to the coal bunker outlet.

[0014] Furthermore, the coal sharing mechanism further comprises a main gear provided on both sides of the coal bunker, and both sides of the main gear are respectively engaged with corresponding sub-gears;

[0015] The cleaning brush is coaxially connected to a secondary roller shaft, both ends of the secondary roller shaft are respectively connected to secondary gears, one end of the secondary roller shaft is provided with a main motor, and the output end of the main motor is coaxially connected to the corresponding main gear.

[0016] Furthermore, the balancing mechanism also includes a secondary roller shaft coaxially connected to the balancing roller, and secondary gears are respectively coaxially connected to both ends of the secondary roller shaft. The secondary gears are coaxially connected to the corresponding sub-gears.

[0017] Furthermore, the outer portion of the spreading roller is formed with a plurality of scraping edges at equal angles along the circumferential direction.

[0018] Furthermore, the sharing mechanism also includes a transfer gear rotatably arranged beside the pinion gear, the transfer gear meshes with the pinion gear, and a residual tooth coaxially connected to the transfer gear is rotatably arranged at the entrance of the coal bunker;

[0019] Racks meshing with the residual teeth are provided on both sides of the residual teeth, the racks are fixedly connected to the curved plate, the curved plate is slidably connected to the side wall of the coal bunker, the upper end of the curved plate is fixedly connected to a horizontal plate, and the horizontal plate is fixedly connected to the upper end of the cutter.

[0020] Furthermore, the upper end of the transverse plate is fixedly connected to the limiting sleeve, the upper end of the limiting sleeve is slidably connected to the limiting plate, and the upper end of the limiting plate is fixedly connected to the coal bunker;

[0021] The upper end of the transverse plate is fixedly connected with two damping rods, and one end of the damping rod away from the transverse plate is fixedly connected with the coal bunker.

[0022] Furthermore, a triangular bevel blade is formed on the side of the lower end of the cutter close to the screen belt.

[0023] Furthermore, the screening belt is driven by a plurality of bearing rollers, the ends of the bearing rollers are fixedly connected with a main pulley, and two adjacent main pulleys are connected by a belt transmission. An auxiliary motor is provided on one side of the screening belt, and the output end of the auxiliary motor is fixedly connected to the main pulley coaxially. A tensioning roller driven by a tensioner is provided at the lower part of the screening belt, and the tensioning roller is against the screening belt;

[0024] A cam roller is provided beside the tensioning roller and is against the screening belt. The end of the cam roller is coaxially connected to a transfer pulley. The transfer pulley is connected to a main pulley at the end of a bearing roller through a belt drive.

[0025] Two crushing rollers are respectively arranged on both sides of the cam roller to abut against the two sides of the screening belt.

[0026] Furthermore, a guide plate is obliquely provided in the middle of the screening belt, and the side of the guide plate close to the blanking plate is higher than the side away from the blanking plate;

[0027] A step plate is provided on one side of the screening belt close to the guide roller, and the lower end of the step plate abuts against the upper end of the guide roller.

[0028] Furthermore, a secondary motor is provided on one side of the outside of the coal bunker, and an output end of the secondary motor is fixedly connected to a swing roller provided beside the water pipe;

[0029] The outer sleeve of the swing roller is provided with two power gears, and the outer sleeve of the water pipe is provided with a swing gear meshing with the two power gears.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] First, traditional coal feeders cannot effectively solve the problem of coal agglomeration, which leads to low efficiency and easy blockage of the coal mill. This device uses a cutter to split the coal. The reciprocating motion of the cutter and the triangular bevel blade design can easily cut into the coal, splitting large coal lumps into small pieces, ensuring uniform coal size, preventing coal agglomeration from affecting the subsequent operation of the coal mill, significantly improving the grinding efficiency of the coal mill, reducing the risk of equipment blockage, and ensuring the continuity of the production process.

[0032] Second, existing coal feeders lack a dedicated pulverized coal separation structure, which can easily cause pipeline blockage and incomplete combustion. This device utilizes the sieve holes of the screen belt to allow small particles of pulverized coal to fall through the sieve holes during the coal lump flattening process. The particles are then guided to the slag hopper via the guide plate, achieving precise separation of pulverized coal from coal lumps, preventing pulverized coal from settling and flying in the pipeline, reducing the risk of pipeline blockage, and improving combustion uniformity and energy utilization.

[0033] Third: Traditional coal feeders are difficult to deal with the problems of spontaneous combustion of flammable coal and dust generation from dry coal. This device sprays water mist onto the coal blocks through the atomizer on the water pipe. For flammable coal, it can lower the temperature of the coal blocks, reduce the release of combustible gas, and eliminate the hidden danger of spontaneous combustion in the pulverizer from the source; for dry coal, it can increase the humidity of coal powder, suppress dust generation, reduce the risk of dust explosion, reduce equipment maintenance costs, extend equipment service life, and ensure production safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment;

[0035] Figure 2 is a schematic diagram of the three-dimensional structure of the embodiment from another angle;

[0036] Figure 3 It is a schematic diagram of the three-dimensional structure decomposition of the embodiment;

[0037] Figure 4 It is an enlarged exploded schematic diagram of a local structure of an embodiment;

[0038] Figure 5 yes Figure 4 A magnified view of the structure at center A;

[0039] Figure 6 3D schematic diagram of the auxiliary roller shaft and the secondary roller shaft in the embodiment;

[0040] Figure 7 Schematic diagram of the three-dimensional structure of the cleaning brush and the spreading roller in the embodiment;

[0041] Figure 8 Schematic diagram of the three-dimensional structure of the screening belt and the guide roller in the embodiment;

[0042] Figure 9 Schematic diagram of the internal structure of the coal bunker in the embodiment;

[0043] Figure 10 yes Figure 9 Local structure cutout diagram of .

[0044] The numbers in the figure are:

[0045] 1. Coal bunker; 2. Inlet; 3. Blanking plate; 4. Outlet; 5. Slag collecting hopper; 6. Equalizing mechanism; 7. Main motor; 8. Main gear; 9. Sub gear; 10. Sub roller; 11. Cleaning brush; 12. Sub gear; 13. Sub roller; 14. Equalizing roller; 15. Scraping edge; 16. Adapter gear; 17. Residual teeth; 18. Rack; 19. Curved plate; 20. Horizontal plate; 21. Limit sleeve; 22. Limit plate; 23. Damping rod; 2 4. Cutter; 25. Triangular bevel blade; 26. Screen belt; 27. Screen hole; 28. Carrying roller; 29. ​​Crushing roller; 30. Cam roller; 31. Transfer pulley; 32. Main pulley; 33. Tensioning roller; 34. Feed plate; 35. Step plate; 36. Guide roller; 37. Water pipe; 38. Atomizer; 39. Swing gear; 40. Power gear; 41. Swing roller; 42. Secondary motor; 43. Feeding conveyor belt; 44. Auxiliary motor. DETAILED DESCRIPTION

[0046] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] refer to Figures 1 to 10 , a special coal feeder for raw coal bunker with multiple channels, comprising:

[0048] The inlet 2 is provided with a coal bunker 1 with a blanking plate 3, a slag collecting hopper 5 is provided at the lower end of the coal bunker 1, and a spreading mechanism 6 for spreading the coal blocks is provided beside the blanking plate 3;

[0049] The coal spreading mechanism 6 includes two cleaning brushes 11 with the same direction. A pair of gears 9 are coaxially arranged at both ends of the cleaning brushes 11. A coal spreading roller 14 is rotatably arranged below the cleaning brushes 11. A cutter 24 for cutting the coal blocks is arranged on the side of the inlet 2 close to the coal spreading roller 14.

[0050] The end of the blanking plate 3 away from the inlet 2 is provided with a screening belt 26 (such as Figure 10 As shown in FIG), a plurality of sieve holes 27 are formed on the sieve belt 26 (such as Figure 7 As shown), the upper end of the screening belt 26 abuts against the evenly distributing roller 14;

[0051] A roller belt composed of several guide rollers 36 is provided on the side of the screening belt 26 away from the blanking plate 3, and a water pipe 37 loaded with multiple atomizers 38 is provided above the guide roller 36. A loading conveyor belt 43 is provided on the side of the roller belt close to the outlet 4 of the coal bunker 1.

[0052] When the device is in operation, coal blocks are fed into the coal feeding bin 1 from the entrance 2 of the coal feeding bin 1, and the blanking plate 3 is placed obliquely. The coal blocks will fall onto the screening belt 26 along the blanking plate 3 under the action of gravity. When the coal blocks fall along the blanking plate 3, the cutter 24 will divide the coal blocks to prevent the coal blocks from clumping, and the spreading roller 14 above the screening belt 26 will flatten the coal blocks above the screening belt 26 to ensure that the divided coal blocks are evenly distributed on the screening material.

[0053] During the coal block splitting and flattening process, the coal block will generate small particles of coal powder, which will fall downward through the sieve holes 27 of the screening belt 26 until they fall into the slag collecting hopper 5 so that they can be collected by the operator.

[0054] As the coal moves along the roller belt formed by guide rollers 36, a water pipe 37 located above the guide rollers 36 sprays water mist onto the coal through an atomizer 38. For flammable coal (such as bituminous coal or lignite), frictional heat or accumulation during transportation in the coal bunker 1 may cause localized temperature increases, prematurely releasing combustible gases. Water spraying can lower the coal temperature before it enters the pulverizer, mitigating the risk of spontaneous combustion within the mill. Furthermore, when the coal is too dry, collisions between coal blocks can cause pulverized coal to accumulate in the coal bunker 1 or generate dust. Water spraying can appropriately increase the humidity of the pulverized coal, improving the adhesion between particles and facilitating transportation and combustion.

[0055] Finally, the coal blocks move along the feeding conveyor 43 and eventually move from the outlet 4 to the coal mill.

[0056] In order to drive the secondary roller shaft 10 to rotate, the following features are also specifically provided:

[0057] The balancing mechanism 6 further includes a main gear 8 provided on both sides of the coal bunker 1, and both sides of the main gear 8 are respectively meshed with corresponding sub-gears 9 (such as Figure 3 shown);

[0058] The cleaning brush 11 is coaxially connected to the secondary roller shaft 10 (such as Figure 7 As shown), both ends of the auxiliary roller shaft 10 are respectively fixedly connected to the auxiliary gear 9, and a main motor 7 is provided at one end of the auxiliary roller shaft 10. The output end of the main motor 7 is coaxially fixedly connected to the corresponding main gear 8.

[0059] After the main motor 7 is started, the main motor 7 drives the main gear 8 to rotate. The main gear 8 and the sub-gear 9 mesh with each other, thereby transmitting power to the sub-gear 9. The sub-gear 9 drives the sub-roller shaft 10 to rotate, thereby realizing the rotation of the cleaning brush 11. This gear transmission method can ensure the stability and accuracy of power transmission, so that the cleaning brush 11 can continuously and stably clean the leveling roller 14 and assist in the leveling work. At the same time, the speed of the cleaning brush 11 can be adjusted by replacing gears with different numbers of teeth to meet the processing requirements of coal lumps with different properties.

[0060] In order to drive the spreading roller 14 to move in the opposite direction to the direction of the cleaning brush 11 so that the cleaning brush 11 can sweep the coal powder on the spreading roller 14, the following features are also provided:

[0061] The balancing mechanism 6 further includes a secondary roller shaft 13 coaxially connected to the balancing roller 14, and secondary gears 12 (such as Figure 3 As shown, the secondary gear 12 is coaxially connected to the corresponding pinion 9. As the pinion 9 rotates, the coaxial connection between the secondary gear 12 and the pinion 9 drives the secondary gear 12 to rotate synchronously, which in turn drives the spreading roller 14 via the secondary roller shaft 13. Furthermore, because the spreading roller 14 and the cleaning brush 11 rotate in opposite directions, the cleaning brush 11 can sweep away any remaining coal dust on the spreading roller 14 as it rotates, preventing its accumulation and impacting the spreading effect. This also ensures the cleanliness of the spreading roller 14's surface, maintaining its normal performance and enabling the spreading roller 14 to continuously and effectively spread the coal.

[0062] Although the cleaned coal dust will fall into the slag hopper 5 as the subsequent coal blocks move, this process prevents the "continuous accumulation" of coal dust on the surface of the roller body of the spreading roller 14. If it is not cleaned in time, the amount of coal dust accumulated will gradually increase as the equipment operates, eventually causing the spreading roller 14 to fail (if coal dust accumulates on the surface of the spreading roller 14, it may rub against the coal blocks during rotation, causing more coal dust to be generated, which in turn increases the load on the roller body of the spreading roller 14. The cleaning brush 11 keeps the roller body of the spreading roller 14 clean, which can reduce the generation of additional coal dust and maintain stable screening efficiency). It is necessary to stop the machine for manual cleaning, which in turn affects production efficiency.

[0063] In order to improve the efficiency of the spreading roller 14 in leveling the coal blocks, the following features are also provided:

[0064] like Figure 7 As shown, the outer surface of the spreading roller 14 is formed with multiple scraping edges 15 at equal angles along the circumference. As the spreading roller 14 rotates to flatten the coal, the scraping edges 15 increase the friction between the spreading roller 14 and the coal, more effectively moving the coal and quickly dispersing accumulated coal, thereby improving spreading efficiency. Furthermore, during rotation, the scraping edges 15 also scrape the surface of the coal to a certain extent, further breaking up surface agglomerates and making the coal more uniform in particle size, thus providing better conditions for subsequent combustion and processing.

[0065] In order to drive the cutter 24 to reciprocate in the vertical direction, the following features are specifically provided:

[0066] The balancing mechanism 6 further includes a transfer gear 16 rotatably arranged beside the pinion 9, and the transfer gear 16 is meshed with the pinion 9 (eg Figure 4 As shown), the entrance 2 of the coal bunker 1 is provided with a residual tooth 17 (as shown) which is coaxially fixed to the transfer gear 16. Figure 3 and Figure 5 shown);

[0067] Racks 18 are respectively provided on both sides of the residual teeth 17, which are meshed with the residual teeth 17 in sequence. The racks 18 are fixedly connected to the curved plate 19, and the curved plate 19 is slidably connected to the side wall of the coal bunker 1. The upper end of the curved plate 19 is fixedly connected to a cross plate 20, and the cross plate 20 is fixedly connected to the upper end of the cutter 24.

[0068] When the pinion 9 rotates, it drives the transfer gear 16, which in turn drives the residual teeth 17. During this rotation, the residual teeth 17 sequentially mesh with the racks 18 on either side, causing the racks 18 to reciprocate vertically. This, in turn, drives the cross plate 20 and cutter 24 through the curved plate 19. This structural design converts the rotation of the pinion 9 into the up-and-down reciprocating motion of the cutter 24, achieving continuous cutting of the coal. Furthermore, the entire transmission process is compact and efficient, ensuring the stability and continuity of the cutting action of the cutter 24.

[0069] In order to limit and dampen the movement of the horizontal plate 20, the following features are specifically provided:

[0070] The upper end of the horizontal plate 20 is fixedly connected to the limiting sleeve 21 (such as Figure 7 As shown), the upper end of the limit sleeve 21 is slidably connected to the limit plate 22, and the upper end of the limit plate 22 is fixedly connected to the coal bunker 1;

[0071] Two damping rods 23 are fixedly connected to the upper end of the transverse plate 20 , and one end of the damping rod 23 away from the transverse plate 20 is fixedly connected to the coal bunker 1 .

[0072] The cooperation between the limiting sleeve 21 and the limiting plate 22 can accurately limit the movement of the horizontal plate 20, preventing the horizontal plate 20 from deflecting during movement, ensuring that the cutter 24 always moves up and down along the predetermined trajectory, and ensuring cutting accuracy. The damping rod 23 acts as a shock absorber during the movement of the horizontal plate 20, absorbing the impact force generated by the reciprocating motion of the horizontal plate 20, reducing vibration and noise of the equipment, extending the service life of the equipment, and also improving the stability and reliability of the equipment operation.

[0073] In order to enable the cutter 24 to push the cut coal block forward when the cutter 24 contacts the coal block, the following features are also provided:

[0074] A triangular bevel blade 25 (such as Figure 7As the cutter 24 moves downward and contacts the coal, the sharp edge 25, with its sharp shape, cuts into the coal more easily, reducing cutting resistance and improving cutting efficiency. After the coal is cut, the slope of the triangular edge 25 generates an oblique thrust on the cut coal, pushing it onto the screening belt 26. This allows the coal to smoothly enter the subsequent processing flow, preventing coal from accumulating on the cutter 24 and ensuring the continuous operation of the coal bunker 1.

[0075] In order to drive the screening belt 26 to move, the following features are also specifically provided:

[0076] The screen belt 26 is driven by a plurality of bearing rollers 28 (eg Figure 10 As shown in FIG), the end of the carrying roller 28 is fixedly connected to the main pulley 32 (as shown in FIG). Figure 7 As shown in the figure, two adjacent main pulleys 32 are connected by belt transmission, an auxiliary motor 44 is provided on one side of the screening belt 26, the output end of the auxiliary motor 44 is coaxially fixedly connected to the main pulley 32, and a tensioning roller 33 driven by a tensioner is provided at the lower part of the screening belt 26, and the tensioning roller 33 is against the screening belt 26;

[0077] A cam roller 30 is provided beside the tensioning roller 33 to abut against the screening belt 26. The end of the cam roller 30 is coaxially connected to a transfer pulley 31. The transfer pulley 31 is connected to a main pulley 32 at the end of a supporting roller 28 through a belt drive.

[0078] Two crushing rollers 29 are respectively provided on both sides of the cam roller 30 to abut against the two sides of the screening belt 26.

[0079] After the auxiliary motor 44 is started, it drives the main pulley 32 connected to its output end to rotate, and through the belt transmission, the multiple bearing rollers 28 rotate in sequence, thereby driving the screening belt 26 to move. The tensioner drives the tensioning roller 33 to apply pressure to the screening belt 26, ensuring that the screening belt 26 is always in a tensioned state, avoiding slippage and ensuring stable operation of the screening belt 26.

[0080] During the rotation of the cam roller 30, its outer profile contacts the screen belt 26, causing the screen belt 26 to vibrate to a certain extent, thereby promoting better screening of the coal on the screen belt 26 and also helping to prevent clogging of the screen holes 27. The crushing roller 29 can further crush the coal stuck in the screen holes 27, making the coal particles more uniform.

[0081] In order to guide the pulverized coal falling through the sieve holes 27, the following features are specifically provided:

[0082] A guide plate 34 (such as Figure 10 As shown), the side of the guide plate 34 close to the blanking plate 3 is higher than the side away from the blanking plate 3;

[0083] A step plate 35 is provided on one side of the screening belt 26 close to the guide roller 36 , and the lower end of the step plate 35 abuts against the upper end of the guide roller 36 .

[0084] The inclined arrangement of the guide plate 34 guides the coal powder falling through the sieve holes 27 along the guide plate 34 to slide into the slag hopper 5, preventing the coal powder from being scattered randomly under the sieve belt 26, making it easier for operators to collect and handle it. The stepped plate 35 guides the coal blocks on the sieve belt 26, allowing them to be smoothly transferred from the sieve belt 26 to the guide roller 36, ensuring the continuity and stability of the coal block conveying process and preventing the coal blocks from getting stuck or falling during the transition process.

[0085] In order to drive the water pipe 37 to swing back and forth, the following features are also provided:

[0086] refer to Figure 2 and Figure 9 A secondary motor 42 is provided on one side of the outside of the coal bunker 1, and an output end of the secondary motor 42 is fixedly connected to a swing roller 41 provided next to the water pipe 37;

[0087] The outer portion of the swing roller 41 is provided with two power gears 40 , and the outer portion of the water pipe 37 is provided with a swing gear 39 meshing with the two power gears 40 .

[0088] After the secondary motor 42 is activated, the secondary click drives the swing roller 41 to rotate, and the power gear 40 on the swing roller 41 rotates accordingly. By meshing with the swing gear 39 on the water pipe 37, the rotation of the swing roller 41 is converted into the reciprocating swing of the water pipe 37. In this way, the atomizer 38 on the water pipe 37 can spray water mist more evenly onto the coal on the roller belt during the swing process, expanding the coverage of the water mist and improving the water spray effect, achieving better treatment results, whether it is to reduce the temperature of the coal blocks or improve the humidity of the coal powder.

[0089] The detailed working principle of this device is as follows: when raw coal needs to be transported and processed, the operator feeds the coal blocks into the coal bunker 1 through the entrance 2. Due to its own gravity, the coal blocks slide down along the obliquely placed blanking plate 3. During this process, the cutter 24 on the side of the entrance 2 near the evenly distributed roller 14 starts to work, the secondary gear 9 rotates to drive the transfer gear 16, which in turn rotates the residual teeth 17. The residual teeth 17 mesh with the rack 18 in sequence, pushing the curved plate 19, the cross plate 20, and the cutter 24 to reciprocate in the vertical direction. The triangular bevel blade 25 of the cutter 24 cuts into the coal blocks, splitting them into small pieces, preventing the coal blocks from clumping and ensuring smooth subsequent transportation and processing.

[0090] After the coal falls onto the screening belt 26, the spreading mechanism 6 begins to function. The main motor 7 starts, driving the main gear 8, which in turn rotates the secondary roller shaft 10 via the secondary gear 9, thereby driving the cleaning brush 11 and the spreading roller 14. The cleaning brush 11 and the spreading roller 14 rotate in opposite directions. The scraping edges 15 on the spreading roller 14 contact the coal, increasing friction and pushing the coal forward, flattening it and distributing it evenly across the screening belt 26. Simultaneously, the rotation of the cleaning brush 11 sweeps away any remaining coal dust on the spreading roller 14.

[0091] The small particles of coal powder generated during the coal block splitting and flattening process will pass through the sieve holes 27 on the screen belt 26 and fall downward. The obliquely placed guide plate 34 guides these coal powders to the slag collecting hopper 5, making it convenient for operators to collect and process them centrally.

[0092] Driven by auxiliary motor 44, the screening belt 26 moves via carrier roller 28, main pulley 32, and belt transmission. A tensioner drives tensioning roller 33 to apply pressure to the screening belt 26, ensuring its tautness. The cam roller 30 vibrates the screening belt 26 during rotation, aiding in coal screening and preventing clogging of the screen holes 27. Crushing rollers 29 further crush the coal on either side of the screen holes 27. The coal is smoothly transferred from the screening belt 26 via step plate 35 to a roller belt consisting of guide rollers 36.

[0093] As the coal moves on the roller belt, the secondary motor 42 activates, driving the swing roller 41 to rotate. The power gear 40 on the swing roller 41 engages the swing gear 39 on the water pipe 37, causing the water pipe 37 to oscillate back and forth. The atomizer 38 on the water pipe 37 sprays a mist of water onto the coal. If the coal is flammable, the water spray lowers its temperature, reducing the risk of spontaneous combustion within the pulverizer. If the coal is too dry, the water spray increases the humidity of the pulverized coal, improving inter-particle adhesion and facilitating transportation and combustion. Finally, the coal moves along the loading conveyor 43 and is delivered from the outlet 4 to the pulverizer, completing the entire raw coal transportation and processing process. The various components of the entire device work in coordination and synergy, achieving efficient and stable transportation and processing of raw coal.

[0094] The above embodiments merely represent one or several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A special coal feeder for multiple-channel raw coal bunkers, characterized in that: include: A coal feeding bin (1) is provided with a blanking plate (3) at the inlet (2), a slag collecting hopper (5) is provided at the lower end of the coal feeding bin (1), and a spreading mechanism (6) for spreading coal lumps is provided beside the blanking plate (3); The spreading mechanism (6) comprises two cleaning brushes (11) with the same rotation direction, two ends of the cleaning brushes (11) are coaxially provided with a pair of gears (9), a spreading roller (14) is rotatably provided below the cleaning brushes (11), and a cutter (24) for cutting coal blocks is provided on the side of the inlet (2) close to the spreading roller (14); A screening belt (26) is provided at one end of the blanking plate (3) away from the inlet (2), a plurality of screening holes (27) are formed on the screening belt (26), and the upper end of the screening belt (26) abuts against the evenly spreading roller (14); A roller belt composed of a plurality of guide rollers (36) is provided on the side of the screening belt (26) away from the blanking plate (3), a water pipe (37) loaded with a plurality of atomizers (38) is provided above the guide rollers (36), and a loading conveyor belt (43) is provided on the side of the roller belt close to the outlet (4) of the coal bunker (1); The balancing mechanism (6) further includes main gears (8) arranged on both sides of the coal bunker (1), and both sides of the main gear (8) are respectively meshed with corresponding sub-gears (9); The cleaning brush (11) is coaxially connected to a secondary roller shaft (10), both ends of the secondary roller shaft (10) are respectively connected to secondary gears (9), a main motor (7) is provided at one end of the secondary roller shaft (10), and an output end of the main motor (7) is coaxially connected to a corresponding main gear (8); The averaging mechanism (6) further includes a secondary roller shaft (13) coaxially connected to the averaging roller (14), and secondary gears (12) are respectively coaxially connected to both ends of the secondary roller shaft (13). The secondary gears (12) are coaxially connected to the corresponding secondary gears (9). The averaging mechanism (6) further includes a transfer gear (16) rotatably arranged beside the secondary gear (9), the transfer gear (16) being meshed with the secondary gear (9), and a residual tooth (17) rotatably arranged at the entrance (2) of the coal bunker (1) and fixedly connected to the transfer gear (16) coaxially. Racks (18) are respectively provided on both sides of the residual teeth (17) and mesh with the residual teeth (17) in sequence. The racks (18) are fixedly connected to the curved plate (19). The curved plate (19) is slidably connected to the side wall of the coal bunker (1). The upper end of the curved plate (19) is fixedly connected to a transverse plate (20), and the transverse plate (20) is fixedly connected to the upper end of the cutter (24).

2. A coal feeder for multiple raw coal bunkers according to claim 1, characterized in that: The outer portion of the spreading roller (14) is formed with a plurality of scraping edges (15) at equal angles along the circumferential direction.

3. The coal feeder for multiple-channel raw coal bunker according to claim 1, characterized in that: The upper end of the horizontal plate (20) is fixedly connected to the limiting sleeve (21), the upper end of the limiting sleeve (21) is slidably connected to the limiting plate (22), and the upper end of the limiting plate (22) is fixedly connected to the coal bunker (1); Two damping rods (23) are fixedly connected to the upper end of the transverse plate (20), and one end of the damping rod (23) away from the transverse plate (20) is fixedly connected to the coal bunker (1).

4. The coal feeder for multiple-channel raw coal bunkers according to claim 1 is characterized in that: A triangular bevel blade (25) is formed on one side of the lower end of the cutter (24) close to the screening belt (26).

5. The coal feeder for multiple-channel raw coal bunkers according to claim 1 is characterized in that: The screening belt (26) is driven by a plurality of bearing rollers (28), the ends of the bearing rollers (28) are fixedly connected to a main pulley (32), two adjacent main pulleys (32) are connected by a belt transmission, an auxiliary motor (44) is provided on one side of the screening belt (26), the output end of the auxiliary motor (44) is fixedly connected to the main pulley (32) coaxially, and a tensioning roller (33) driven by a tensioner is provided at the lower part of the screening belt (26), and the tensioning roller (33) is abutted against the screening belt (26); A cam roller (30) is provided on the side of the tensioning roller (33) and is in contact with the screening belt (26). The end of the cam roller (30) is coaxially connected to a transfer pulley (31). The transfer pulley (31) is connected to a main pulley (32) at the end of a carrier roller (28) through a belt drive. Two crushing rollers (29) are respectively provided on both sides of the cam roller (30) and are opposed to the two sides of the screening belt (26).

6. The coal feeder for multiple-channel raw coal bunkers according to claim 1, characterized in that: A guide plate (34) is obliquely provided in the middle of the screening belt (26), and a side of the guide plate (34) close to the blanking plate (3) is higher than a side away from the blanking plate (3); A step plate (35) is provided on one side of the screening belt (26) close to the guide roller (36), and the lower end of the step plate (35) abuts against the upper end of the guide roller (36).

7. The coal feeder for multiple-channel raw coal bunkers according to claim 1, characterized in that: A secondary motor (42) is provided on one side of the outside of the coal bunker (1), and an output end of the secondary motor (42) is fixedly connected to a swing roller (41) provided beside the water pipe (37); The outer sleeve of the swing roller (41) is provided with two power gears (40), and the outer sleeve of the water pipe (37) is provided with a swing gear (39) meshing with the two power gears (40).

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