A coal stacking and drawing device for fuel transportation of a thermal power plant

Abstract

The present application provides a kind of coal handling device for fuel transportation of thermal power plant, including frame, moving mechanism, conveying belt, upper hopper wheel, lower hopper and dust removal mechanism;Frame is arranged at the front end of moving mechanism, conveying belt, upper hopper wheel and lower hopper are all installed on frame, lower hopper is arranged in the discharge area of upper hopper wheel and above the conveying belt;Dust removal mechanism includes top cover fixed on the top of lower hopper, top cover covers the discharge area of upper hopper wheel and above the lower hopper, top cover and lower hopper jointly form discharge space, and the discharge area of upper hopper wheel is basically enclosed in a relatively closed space, a large number of coal ash particles generated when coal falls into lower hopper from shovel during discharging process are limited inside the discharge space, and cannot drift outward, thereby effectively preventing the pollution of coal ash particles to the surrounding working environment, and improving the working environment of coal yard of thermal power plant.

Description

Technical Field

[0001] This invention belongs to the technical field of fuel transportation equipment, specifically relating to a coal stacking and reclaiming device for fuel transportation in thermal power plants. Background Technology

[0002] In the fuel transportation process of thermal power plants, coal stacking and coal removal are crucial links to ensure the continuous operation of generator units. Currently, bucket wheel excavators are commonly used in coal yards of thermal power plants for coal stacking and coal removal operations. The bucket wheel excavator uses the bucket on the bucket wheel to scoop up coal and stack it. When the bucket rotates to its highest point, it dumps the coal into the discharge hopper, which then guides it onto a conveyor belt for transport to subsequent processing sections.

[0003] However, existing coal stacking and reclaiming devices used for fuel transportation in thermal power plants have the following technical problems during coal reclaiming operations: First, when the bucket dumps coal in the unloading area, a large amount of dust is generated as the coal falls from the bucket into the feed hopper. The coal ash particles disperse outwards, severely polluting the working environment and wasting coal resources. Second, there is a gap between the bottom of the feed hopper and the conveyor belt, allowing dust-laden gas inside the feed hopper to easily escape through this gap, further exacerbating dust pollution. Although some existing technologies have a cover plate on the top of the feed hopper, since the bucket wheel needs to pass through the cover plate to enter the feed hopper, there must be a clearance gap between the cover plate and the bucket wheel. Relying solely on the top cover plate cannot create an effective sealing environment, resulting in limited dust removal efficiency.

[0004] To address the aforementioned problems, it is necessary to propose a coal stacking and reclaiming device for fuel transportation in thermal power plants that is rationally designed and effectively solves these problems. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art, and to provide a coal stacking and coal removal device for fuel transportation in thermal power plants.

[0006] This invention provides a coal stacking and reclaiming device for fuel transportation in thermal power plants, comprising a frame, a moving mechanism, a conveyor belt, an upper feeding wheel, an lowering hopper, and a dust removal mechanism; the frame is disposed at the front end of the moving mechanism, the conveyor belt, the upper feeding wheel, and the lowering hopper are all mounted on the frame, and the lowering hopper is disposed in the unloading area of ​​the upper feeding wheel and located above the conveyor belt; The dust removal mechanism includes a top cover fixed to the top of the hopper. The top cover covers the unloading area of ​​the upper hopper wheel and the upper hopper, and the top cover and the hopper together enclose the unloading space.

[0007] Optionally, the top cover is provided with a clearance hole, through which the feeding bucket wheel passes and extends into the unloading space.

[0008] Optionally, an axial flow fan is installed on the top of the cover, and the air outlet of the axial flow fan is used to connect with external dust removal equipment.

[0009] Optionally, the device further includes a blocking component, which is disposed on the bottom of the hopper facing the material conveying direction, and the lower end of the blocking component is in contact with the coal on the conveyor belt.

[0010] Optionally, the blocking assembly includes a support plate and a rubber strip disposed at the bottom of the support plate, the rubber strip being disposed downward and in contact with the coal on the conveyor belt.

[0011] Optionally, a magnet is embedded in the top of the support plate, and the support plate is attracted and fixed to the hopper by the magnet.

[0012] Optionally, two insertion posts are fixed to the top of the support plate, and vertical mounting holes are correspondingly opened on the hopper, with the insertion posts inserted into the vertical mounting holes; The connector is equipped with an anti-detachment structure.

[0013] Optionally, two crushing rollers rotating in opposite directions are installed inside the hopper. The surface of the crushing rollers is provided with crushing teeth, and the crushing teeth on the two crushing rollers are staggered.

[0014] Optionally, a guide plate is installed inside the hopper, which is used to guide the coal in the hopper to be conveyed between the two crushing rollers.

[0015] Optionally, the feeding bucket wheel includes a wheel frame and a plurality of buckets mounted on the wheel frame; The wheel frame includes an outer fixing ring, an inner fixing ring, a connecting post, wheel spokes, and a rotating shaft; wherein... The outer fixing ring and the inner fixing ring are coaxially fixedly connected by multiple connecting columns, and multiple buckets are evenly installed between the outer fixing ring and the inner fixing ring; the rotating shaft is fixedly connected to the outer fixing ring by the wheel spokes, and the rotating shaft is rotatably connected to the frame.

[0016] The coal stacking and reclaiming device for fuel transportation in thermal power plants provided by the present invention, by setting a top cover on the top of the hopper and forming a discharge space together with the hopper, essentially encloses the discharge area of ​​the upper bucket wheel in a relatively sealed space. During the discharge process, a large amount of coal ash particles generated when coal falls from the bucket into the hopper are confined inside the discharge space and cannot be dispersed outward, thereby effectively preventing coal ash particles from polluting the surrounding working environment and improving the working environment of the coal yard in thermal power plants. Attached Figure Description

[0017] Figure 1This is a schematic diagram of a coal stacking and reclaiming device for fuel transportation in a thermal power plant, according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the dust removal mechanism according to another embodiment of the present invention; Figure 3 This is a schematic diagram showing the installation position of the blocking component according to another embodiment of the present invention; Figure 4 This is a schematic diagram of the blocking component according to another embodiment of the present invention.

[0018] Figure 5 This is a schematic diagram of the installation position of the crushing roller mounting structure according to another embodiment of the present invention; Figure 6 This is a schematic diagram of the feeding bucket wheel according to another embodiment of the present invention. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1 As shown, the present invention provides a coal stacking and coal taking device for fuel transportation in thermal power plants, including a frame 1, a moving mechanism, a conveyor belt 3, an upper feeding wheel 4, an lower feeding hopper 2, and a dust removal mechanism 5; the frame 1 is disposed at the front end of the moving mechanism, the conveyor belt 3, the upper feeding wheel 4, and the lower feeding hopper 2 are all installed on the frame 1, and the lower feeding hopper 2 is disposed in the unloading area of ​​the upper feeding wheel 4 and located above the conveyor belt 3.

[0021] Specifically, a frame 1 is installed at the front end of the moving mechanism. The moving mechanism is used to drive the frame 1 and the components installed on it to move as a whole along the coal yard track. The moving mechanism can adopt a tracked chassis or a track-mounted trolley. The bottom of the trolley is equipped with wheels and a drive motor. The wheels cooperate with the pre-set track in the coal yard, and the drive motor drives the wheels to move along the track, thereby realizing the movement of the entire device in the coal yard.

[0022] The conveyor belt 3 is mounted on the frame 1 and is arranged along the length of the frame 1. A drive roller and a driven roller are respectively installed at both ends of the conveyor belt 3. The drive roller is driven by a drive motor to rotate, thereby driving the conveyor belt 3 to transport coal from the front end to the rear end of the frame 1. The conveyor belt 3 can be supported by trough-type idler rollers to ensure that coal does not easily spill from both sides of the belt during transportation.

[0023] The feeding bucket wheel 4 is used to grab the coal pile. The feeding bucket wheel 4 is rotatably mounted at the front end of the frame 1. The feeding bucket wheel 4 is driven to rotate by the bucket wheel drive motor through the reducer. Multiple buckets 42 are evenly installed around the outer periphery of the feeding bucket wheel 4. The buckets 42 continuously scoop up the coal on the coal pile as the feeding bucket wheel 4 rotates. When the buckets 42 rotate with the feeding bucket wheel 4 to the unloading area near the highest point, the coal in the buckets 42 is discharged under the action of gravity.

[0024] The discharge hopper 2 is used to transfer the coal grabbed by the upper bucket wheel 4 onto the conveyor belt 3. The discharge hopper 2 is installed in the unloading area of ​​the upper bucket wheel 4 and has a structure that is wider at the top and narrower at the bottom. More specifically, the discharge hopper 2 has a conical structure, wider at the top and narrower at the bottom. The upper opening of the discharge hopper 2 faces the unloading position of the upper bucket wheel 4 to receive the coal unloaded by the upper bucket wheel 4, and the lower opening of the discharge hopper 2 is located above the top of the conveyor belt 3, guiding the received coal onto the conveyor belt 3. The discharge hopper 2 can be fixedly installed on the frame 1 by welding or bolting. The side wall of the discharge hopper 2 forms a certain angle with the vertical direction to facilitate the smooth sliding of coal along the hopper wall.

[0025] like Figure 2 As shown, the dust removal mechanism 5 includes a top cover 51 fixed to the top of the discharge hopper 2. The top cover 51 covers the discharge area of ​​the upper hopper wheel 4 and the discharge hopper 2, and the top cover 51 and the discharge hopper 2 together enclose the discharge space. The top cover 51 can be welded from steel plate, and its shape is adapted to the shape of the upper opening of the discharge hopper 2. The top cover 51 is fixedly connected to the top of the discharge hopper 2, specifically by bolt connection or welding.

[0026] The coal stacking and reclaiming device for fuel transportation in thermal power plants provided by the present invention, by setting a top cover on the top of the hopper and forming a discharge space together with the hopper, essentially encloses the bucket wheel discharge area in a relatively sealed space. During the discharge process, a large amount of coal ash particles generated when coal falls from the bucket into the hopper are confined inside the discharge space and cannot be dispersed outward, thereby effectively preventing coal ash particles from polluting the surrounding working environment and improving the working environment of the coal yard in thermal power plants.

[0027] For example, such as Figure 2 As shown, the top cover 51 has a clearance hole 511, through which the feeding bucket wheel 4 passes and extends into the unloading space. The shape and size of the clearance hole 511 are adapted to the outer contour of the feeding bucket wheel 4, ensuring that the feeding bucket wheel 4 can rotate freely while minimizing the opening area at the clearance hole 511 to maintain the sealing of the unloading space.

[0028] In this embodiment, by opening clearance holes on the top cover, the feeding bucket wheel can pass through the top cover and extend into the unloading space for unloading. This ensures the normal rotation of the bucket wheel and the unloading operation, while also including the unloading area of ​​the feeding bucket wheel within the enclosure of the top cover, minimizing the area of ​​communication between the unloading space and the outside. By setting clearance holes, the movement requirements of the feeding bucket wheel are met while maintaining the relative airtightness of the unloading space, avoiding large openings caused by the feeding bucket wheel passing through, and thus effectively preventing dust generated during the unloading process from escaping outward from the openings.

[0029] For example, such as Figure 2 As shown, an axial flow fan 52 is installed on the top of the top cover 51, and the air outlet of the axial flow fan 52 is used to connect with external dust removal equipment.

[0030] Specifically, the axial flow fan 52 is fixedly installed on the top of the top cover 51. The air inlet of the axial flow fan 52 is connected to the unloading space, and the air outlet is connected to external dust removal equipment through the connecting pipe 522. The axial flow fan 52 is fixed to the mounting hole opened on the top cover 51 by flange connection, and the impeller of the axial flow fan 52 extends into the mounting hole. The connecting pipe 522 on the top of the axial flow fan 52 is connected to the industrial dust collector installed on the rear moving mechanism through the pipe installed on the side of the frame 1. The industrial dust collector can be a bag filter or a cyclone dust collector, or other conventional dust removal equipment in the field.

[0031] In this embodiment, by installing an axial flow fan on the top of the cover and connecting the fan's outlet to external dust removal equipment, the axial flow fan continuously draws air from the unloading space after startup, creating a negative pressure environment inside the unloading space. The coal ash particles generated during unloading are forcibly drawn to the external dust removal equipment for purification under negative pressure, achieving active dust removal from the source. Compared to passively blocking dust with the cover plate alone, negative pressure dust removal can remove dust at its initial stage, significantly improving dust removal efficiency. Furthermore, this dust removal method is dry dust removal, eliminating the need for water consumption and avoiding the problem of increased coal moisture content due to spraying water, which affects subsequent combustion efficiency. Simultaneously, because the unloading space is under negative pressure, outside air is introduced through gaps such as the clearance holes, rather than dust-laden gas escaping outwards. This cleverly transforms the gaps at the clearance holes into air supply channels, achieving a good airtight seal.

[0032] For example, such as Figure 3 As shown, the coal stacking and coal taking device for fuel transportation in thermal power plants also includes a blocking component 21. The blocking component 21 is located on the bottom of the hopper 2 on the side facing the material conveying direction, and the lower end of the blocking component 21 is in contact with the coal on the conveyor belt 3.

[0033] Specifically, the barrier component 21 is about 30cm to 40cm above the bottom of the hopper 2, and the bottom of the hopper 2 is about 1cm to 2cm above the top of the conveyor belt 3.

[0034] The blocking assembly 21 is installed at the discharge port of the hopper 2, located on the side of the hopper 2 facing the conveyor belt 3 in the conveying direction. The bottom discharge port of the hopper 2 is located above the conveyor belt 3, and a gap of 1cm to 2cm is left between the bottom of the hopper 2 and the top of the conveyor belt 3 to ensure that the conveyor belt 3 can run smoothly without interfering with the hopper 2. The blocking assembly 21 is fixedly installed on the outer wall of the hopper 2 on the side facing the conveyor belt 3 in the conveying direction, and its lower end extends above the conveyor belt 3, contacting the coal on the conveyor belt 3.

[0035] When coal in hopper 2 falls from the bottom of hopper 2 onto the top of conveyor belt 3, it is conveyed to the rear by the conveyor belt 3. When the coal on conveyor belt 3 passes the blocking component 21, it pushes the lower end of the blocking component 21 open. The blocking component 21 can automatically adjust with the coal height. When the coal height on conveyor belt 3 is high, the coal pushes the lower end of the blocking component 21 upward; when the coal height is low, the blocking component 21 falls back under its own gravity, always maintaining contact with the coal surface.

[0036] In this embodiment, the blocking component comes into contact with the coal on the conveyor belt, which can seal the gap between the discharge port at the bottom of the hopper and the conveyor belt to a certain extent, reducing the possibility of gas inside the hopper being discharged outward; when the inside of the hopper is under negative pressure under the action of the dust removal mechanism, outside air is drawn into the hopper through the gap between the blocking component and the coal, further reducing the possibility of dust-laden gas being discharged outward, thus forming a good airtight effect.

[0037] For example, such as Figure 4 As shown, the blocking assembly 21 includes a support plate 211 and a rubber strip 212 disposed at the bottom of the support plate 211. The rubber strip 212 is disposed downward and in contact with the coal on the conveyor belt 3.

[0038] Specifically, the support plate 211 can be made of steel plate or rigid plastic plate, possessing a certain structural strength. The upper end of the support plate 211 is fixed to the outer wall of the hopper 2 on the side facing the conveyor belt 3 in the conveying direction, and the lower end extends downward to above the conveyor belt 3. Multiple rubber strips 212 can be fixed to the bottom of the support plate 211 in multiple rows, with the lower end of the rubber strips 212 extending a certain length beyond the lower edge of the support plate 211. The rubber strips 212 can be made of natural rubber or synthetic rubber material, possessing good flexibility and wear resistance.

[0039] As the coal moves along the conveyor belt 3, it pushes the rubber strip 212 forward. Due to the good flexibility and reasonable installation density of the rubber strip 212, it maintains good contact with the coal surface, allowing the coal to pass smoothly while effectively preventing gas leakage from the hopper 2. Simultaneously, the frictional contact between the rubber strip 212 and the coal can also scrape away fine coal dust adhering to the coal surface to a certain extent, reducing dust generation during the coal conveying process.

[0040] In this embodiment, the support plate provides structural strength to ensure that the barrier assembly is not easily deformed during use, while the rubber strips utilize their good flexibility and wear resistance to maintain elastic contact with the coal on the conveyor belt. The rubber strips can automatically adjust their posture according to changes in the height of the coal on the conveyor belt, allowing the coal to pass smoothly while effectively preventing gas leakage from the hopper. At the same time, the frictional contact between the rubber strips and the coal can also scrape off fine coal dust adhering to the coal surface to a certain extent, reducing dust generation during coal transportation. When multiple rubber strips are used in multiple rows, multiple sealing barriers can be formed, further improving the airtightness.

[0041] For example, such as Figure 4 As shown, a magnet block 2111 is embedded in the top of the support plate 211, and the support plate 211 is attracted and fixed on the feed hopper 2 by the magnet block 2111.

[0042] Specifically, the magnet 2111 is embedded in the side surface of the support plate 211 facing the hopper 2, and the support plate 211 is fixed to the side wall of the hopper 2 by magnetic attraction. The setting of the magnet 2111 makes the installation and disassembly of the blocking assembly 21 more convenient, and facilitates daily maintenance and replacement of the rubber strip 212.

[0043] In this embodiment, by embedding a magnet at the top of the support plate, the support plate is magnetically attracted and fixed to the side wall of the hopper, realizing the quick installation and disassembly of the blocking component. During long-term use, the rubber strip will wear out due to continuous friction with coal and needs to be replaced regularly. The magnetic fixing method can complete the disassembly and assembly of the blocking component without the aid of tools, which greatly simplifies the maintenance process, reduces the maintenance difficulty and time cost, and helps to ensure the long-term stable operation of the equipment.

[0044] For example, such as Figure 4As shown, two insertion posts 2112 are fixed to the top of the support plate 211, and vertical mounting holes are correspondingly provided on the hopper 2. The insertion posts 2112 are inserted into the vertical mounting holes. The insertion posts 2112 are fixed to the top end face of the support plate 211 and extend upward in the vertical direction. Vertical mounting holes adapted to the insertion posts 2112 are correspondingly provided on the side wall of the hopper 2, and the insertion posts 2112 are inserted into the vertical mounting holes. During coal conveying, the support plate 211 is subjected to the lateral tension exerted by the coal on the conveyor belt 3. The insertion posts 2112 and the hole wall of the vertical mounting holes generate friction under the squeezing action, thereby improving the connection strength and preventing the blocking component 21 from displacing or falling off under the pushing action of the coal.

[0045] Furthermore, the plug-in post 2112 is provided with an anti-detachment structure, such as threads or protrusions. The anti-detachment structure further improves the connection strength under the lateral tensile force applied to the support plate 211. For example, with threads, the upper end of the plug-in post 2112 can be provided with external threads, and after the plug-in post 2112 passes through the vertical mounting hole, it is tightened and fixed by a nut. With protrusions, the surface of the plug-in post 2112 can be provided with multiple raised points. When the plug-in post 2112 is inserted into the vertical mounting hole, the protrusions form an interference fit with the hole wall, thereby preventing the plug-in post 2112 from detaching from the mounting hole.

[0046] In this embodiment, by fixing the plug-in column on the top of the support plate and inserting it into the corresponding vertical mounting hole on the hopper, and simultaneously setting an anti-detachment structure on the plug-in column, during the coal conveying process, the support plate is subjected to the lateral tension exerted by the coal on the conveyor belt. The plug-in column and the hole wall of the vertical mounting hole generate friction under the squeezing action. Combined with the limiting effect of the anti-detachment structure, it can effectively prevent the blocking component from displacing or falling off under the continuous thrust of the coal, ensuring the connection reliability and positional stability of the blocking component during operation. The combination of magnetic fixing and plug-in fixing methods ensures both connection strength and ease of assembly and disassembly.

[0047] For example, such as Figure 5 As shown, two crushing rollers 22 rotating in opposite directions are installed inside the hopper 2. The two crushing rollers 22 crush the lump coal by squeezing. The surface of the crushing rollers 22 is provided with crushing teeth, and the crushing teeth on the two crushing rollers 22 are staggered.

[0048] Specifically, two crushing rollers 22 are arranged parallel to each other in the internal cavity of the feed hopper 2, with their axes lying in the same horizontal plane and parallel to each other. The two ends of each crushing roller 22 are rotatably supported on the side wall of the feed hopper 2 via bearings. Driven by a driver, the two crushing rollers 22 rotate in opposite directions; one roller rotates clockwise, and the other counterclockwise. After coal falls between the two crushing rollers 22, it is crushed into smaller particles under the opposing compression and shearing action of the rollers.

[0049] Crushing rollers 22 are provided with crushing teeth on their surfaces, and the crushing teeth on the two crushing rollers 22 are staggered to avoid interference. Specifically, multiple crushing teeth are evenly distributed along the axial and circumferential directions on the outer circumferential surface of each crushing roller 22. The crushing teeth can adopt a truncated tooth shape or a wolf tooth shape. The crushing teeth on the two crushing rollers 22 are staggered in the circumferential direction. When the two crushing rollers 22 rotate relative to each other, the crushing teeth on one crushing roller 22 are precisely embedded in the gap between two adjacent crushing teeth on the other crushing roller 22, which ensures the crushing effect while avoiding mutual interference and collision between the crushing teeth.

[0050] In this embodiment, by installing two crushing rollers rotating in opposite directions inside the hopper, and setting staggered crushing teeth on the surface of the crushing rollers, the lump coal unloaded from the bucket wheel undergoes compression and shearing crushing treatment by the crushing rollers before entering the conveyor belt, breaking large pieces of coal into smaller and more uniform particles. The crushed coal is easier to distribute evenly and transport stably on the conveyor belt, avoiding the problems of local overload and uneven wear of the conveyor belt caused by uneven accumulation of lump coal on the belt, and extending the service life of the conveyor belt.

[0051] For example, such as Figure 5 As shown, a guide plate 24 is installed inside the feeding hopper 2. The guide plate 24 is used to guide the coal in the feeding hopper 2 to be conveyed between the two crushing rollers 22.

[0052] Specifically, guide plates 24 are positioned between the feed inlet of the hopper 2 and the two crushing rollers 22. The guide plates 24 can be two relatively inclined plates, with their upper ends fixed to the inner walls of opposite sides of the hopper 2, and their lower ends converging towards the gap between the two crushing rollers 22. The guide plates 24 form a certain angle with the vertical direction, allowing coal falling into the hopper 2 to slide along the inclined surface of the guide plates 24 into the crushing area between the two crushing rollers 22, preventing coal from bypassing the crushing rollers 22 without undergoing crushing.

[0053] In this embodiment, by installing a guide plate inside the hopper, the coal falling into the hopper slides along the inclined surface of the guide plate to the crushing area between the two crushing rollers. This avoids the situation where coal bypasses the sides of the crushing rollers and falls directly into the conveyor belt without being crushed. This ensures that all lump coal entering the hopper can be crushed, improving the comprehensiveness and uniformity of crushing, and thus ensuring the consistency of coal particle size on the conveyor belt.

[0054] Furthermore, such as Figure 2 As shown, a driver 23 is installed on the outside of the hopper 2. The driver 23 drives the two crushing rollers 22 to rotate. The driver 23 can simultaneously drive the two crushing rollers 22 using a single motor and a gearbox. Specifically, the drive motor is fixedly installed on the outer wall of the hopper 2. The output shaft of the drive motor is connected to the input shaft of the gearbox. The gearbox contains two output gears, which are fixedly connected to the ends of the rotating shafts of the two crushing rollers 22, and the two output gears mesh with each other. After the drive motor starts, through the transmission of the gearbox, the two output gears rotate synchronously in opposite directions, thereby driving the two crushing rollers 22 to rotate synchronously in opposite directions. Using a single motor to drive the two crushing rollers simultaneously ensures the synchronicity of the two crushing rollers 22, simplifies the drive structure, and reduces manufacturing costs.

[0055] The crushing roller 22 ensures that the lump coal unloaded from the feed bucket wheel 4 is crushed before entering the conveyor belt 3, breaking large pieces of coal into smaller, more uniform particles. The crushed coal is easier to distribute evenly and transport stably on the conveyor belt 3, while also reducing the crushing load on subsequent stages (such as the coal mill). Furthermore, the refinement of coal particles during crushing also helps reduce dust generation during subsequent transportation and storage.

[0056] For example, such as Figure 6 As shown, the feeding bucket wheel 4 includes a wheel frame 41 and a plurality of buckets 42 mounted on the wheel frame 41. As the wheel frame 41 rotates, the buckets 42 scoop up the coal pile, raise it to the unloading area, and then unload it.

[0057] The wheel frame 41 includes an outer fixing ring 411, an inner fixing ring 412, connecting posts 413, spokes 414, and a rotating shaft 415. The outer fixing ring 411 and the inner fixing ring 412 are coaxially fixedly connected by multiple connecting posts 413, and multiple buckets 42 are evenly installed between the outer fixing ring 411 and the inner fixing ring 412. The rotating shaft 415 is connected and fixed to the outer fixing ring 411 through the spokes 414, and is rotatably connected to the frame 1.

[0058] Specifically, both the outer fixing ring 411 and the inner fixing ring 412 are annular structures, with the diameter of the outer fixing ring 411 equal to the diameter of the inner fixing ring 412. The outer fixing ring 411 and the inner fixing ring 412 are coaxially fixedly connected by multiple connecting posts 413. Specifically, the multiple connecting posts 413 are evenly distributed circumferentially, thereby connecting the outer fixing ring 411 and the inner fixing ring 412 into an integral frame structure.

[0059] Multiple buckets 42 are evenly installed between the outer fixing ring 411 and the inner fixing ring 412. Specifically, the buckets 42 can be fixed to the outer fixing ring 411 and the inner fixing ring 412 by bolting or welding, and the opening direction of the buckets 42 is arranged radially outward along the wheel frame 41. The multiple buckets 42 are evenly distributed around the circumference of the wheel frame 41. When the wheel frame 41 rotates, the buckets 42 pass over the surface of the coal pile in sequence, shovel the coal into the buckets, and lift the coal to the unloading area as the wheel frame 41 rotates.

[0060] The rotating shaft 415 is located at the center of the wheel frame 41, and is connected and fixed to the outer fixing ring 411 via spokes 414. Specifically, the spokes 414 can be composed of multiple radially arranged connecting rods, one end of which is fixedly connected to the outer wall of the rotating shaft 415, and the other end is fixedly connected to the rotating shaft 415. The rotating shaft 415 is rotatably connected to the frame 1 and is also drive-driven to the drive motor on the frame 1. Specifically, both ends of the rotating shaft 415 can be rotatably supported on the frame 1 via bearing seats, and one end of the rotating shaft 415 is connected to the output shaft of the drive motor via a coupling or belt drive mechanism. After the drive motor starts, it drives the outer fixing ring 411, the inner fixing ring 412, and the connecting column 413 to rotate as a whole through the rotating shaft 415 and spokes 414, thereby driving the bucket 42 mounted on it to rotate synchronously, realizing the coal taking operation.

[0061] The feeding bucket wheel 4 adopts a frame design with a double-ring structure of outer fixing ring 411 and inner fixing ring 412 and connecting column 413. The double-ring structure provides two fixed support points for the bucket 42, making the installation of the bucket 42 more stable and reliable, and able to withstand the large impact force during the coal mining process.

[0062] like Figures 1 to 6 As shown, the coal removal process of the coal stacking and coal removal device for fuel transportation in thermal power plants provided by the present invention is as follows: The moving mechanism drives the frame 1 and its components to move to the target coal pile in the coal yard. The drive motor drives the wheel frame 41 to rotate as a whole through the shaft 415 and spokes 414. The bucket 42, installed between the outer fixing ring 411 and the inner fixing ring 412, rotates with the wheel frame 41, passing over the surface of the coal pile in sequence, shoveling coal into the bucket, and lifting the coal to the unloading area as the wheel frame 41 rotates. When the bucket 42 rotates to the unloading area near its highest point, the coal in the bucket 42 is discharged under gravity and falls into the feed hopper 2.

[0063] After receiving the coal unloaded from the upper bucket wheel 4, the coal slides down the bucket wall of the lower bucket 2 between the two crushing rollers 22. The driver 23 drives the two crushing rollers 22 to rotate in opposite directions, compressing and crushing the coal into smaller particles. The crushed coal continues to move downwards and falls from the discharge port at the bottom of the lower bucket 2 onto the conveyor belt 3.

[0064] As coal falls onto conveyor belt 3, the blocking component 21 at the bottom of the hopper 2 comes into contact with the coal on conveyor belt 3. The rubber strip 212 is slightly lifted by the coal, allowing it to pass through smoothly while maintaining contact with the coal surface, thus playing a role in sealing and dust suppression.

[0065] Simultaneously, the dust removal mechanism 5 starts operating. The axial flow fan 52 continuously draws air from the unloading space formed by the top cover 51 and the discharge hopper 2, creating a negative pressure environment inside the unloading space. Coal ash particles generated during the unloading process by the feeding wheel 4 are drawn into the axial flow fan 52 under negative pressure and transported to the industrial dust collector for purification via the connecting pipe 522 and pipeline. The negative pressure environment effectively prevents coal ash particles from escaping into the external environment.

[0066] The conveyor belt 3 transports the crushed coal from the front end of the frame 1 to the rear end, and finally to the subsequent section (such as the raw coal bunker or coal mill). After appropriate processing, the coal is supplied to the power plant for power generation.

[0067] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A coal stacking and reclaiming device for fuel transportation in thermal power plants, characterized in that, It includes a frame, a moving mechanism, a conveyor belt, an upper feeding wheel, an lower feeding hopper, and a dust removal mechanism; the frame is located at the front end of the moving mechanism, the conveyor belt, the upper feeding wheel, and the lower feeding hopper are all mounted on the frame, and the lower feeding hopper is located in the unloading area of ​​the upper feeding wheel and above the conveyor belt; The dust removal mechanism includes a top cover fixed to the top of the hopper. The top cover covers the unloading area of ​​the upper hopper wheel and the upper hopper, and the top cover and the hopper together enclose the unloading space.

2. The apparatus according to claim 1, characterized in that, The top cover has a clearance hole, through which the feeding bucket wheel passes and extends into the unloading space.

3. The apparatus according to claim 1, characterized in that, An axial flow fan is installed on the top of the cover, and the outlet of the axial flow fan is used to connect to external dust removal equipment.

4. The apparatus according to claim 1, characterized in that, The device also includes a blocking component, which is disposed on the bottom of the hopper facing the material conveying direction, and the lower end of the blocking component is in contact with the coal on the conveyor belt.

5. The apparatus according to claim 4, characterized in that, The blocking assembly includes a support plate and a rubber strip disposed at the bottom of the support plate, the rubber strip being disposed downward and in contact with the coal on the conveyor belt.

6. The apparatus according to claim 5, characterized in that, A magnet is embedded in the top of the support plate, and the support plate is fixed to the hopper by the magnet.

7. The apparatus according to claim 5, characterized in that, Two insertion posts are fixed to the top of the support plate, and vertical mounting holes are correspondingly opened on the hopper, with the insertion posts inserted into the vertical mounting holes; The connector is equipped with an anti-detachment structure.

8. The apparatus according to claim 1, characterized in that, The hopper is equipped with two crushing rollers that rotate in opposite directions. The surface of the crushing rollers is provided with crushing teeth, and the crushing teeth on the two crushing rollers are staggered.

9. The apparatus according to claim 8, characterized in that, A guide plate is installed inside the hopper, which is used to guide the coal in the hopper to be conveyed between the two crushing rollers.

10. The apparatus according to claim 1, characterized in that, The feeding bucket wheel includes a wheel frame and multiple buckets mounted on the wheel frame; The wheel frame includes an outer fixing ring, an inner fixing ring, a connecting post, wheel spokes, and a rotating shaft; wherein... The outer fixing ring and the inner fixing ring are coaxially fixedly connected by multiple connecting columns, and multiple buckets are evenly installed between the outer fixing ring and the inner fixing ring; the rotating shaft is fixedly connected to the outer fixing ring by the wheel spokes, and the rotating shaft is rotatably connected to the frame.

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