Coal blockage preventing device for thermal power plant

Abstract

The invention discloses a coal blocking prevention device for a thermal power plant, and relates to the technical field of coal blocking prevention, the coal blocking prevention device for the thermal power plant comprises a supporting platform and further comprises a first fixing frame and a second fixing frame, and the first fixing frame and the second fixing frame are installed at the top of the supporting platform. Therefore, it is guaranteed that the dust cover can be stably installed above the conveying belt mechanism, and meanwhile part of equipment can be conveniently and rapidly disassembled and assembled during daily maintenance. Damage of high-frequency low-amplitude vibration to the conveying belt and the structure of the conveying belt is far smaller than that of a traditional powerful vibrator; through the design of the detachable recovery box and bolt connection, daily maintenance and repair are greatly facilitated, dust dissipation is effectively restrained through the fully-closed dustproof cover and internal equipment, the working environment is improved, centralized treatment and recycling of residues also meet the requirement for clean production, and through the design of the weight box, the bottom damp-proof plate, the multiple supporting bases and the damping plates, the service life of the device is prolonged. And stable operation of the whole set of heavy equipment in a complex industrial environment is jointly guaranteed.

Description

Technical Field

[0001] This invention relates to the field of coal blockage prevention technology, specifically to a coal blockage prevention device for thermal power plants. Background Technology

[0002] In coal conveying systems of thermal power plants, coal blockage is a long-standing technical problem that seriously affects production efficiency and equipment safety. Raw coal, especially coal with high moisture content or high dust content, is prone to sticking and arching during transport on conveyor belts, particularly at critical locations such as the discharge port and transfer points. Existing anti-blockage technologies have the following limitations: Therefore, there is an urgent need in this field for a comprehensive anti-clogging device that can proactively prevent, clean online, automatically recycle and centrally process clogged materials, while reducing equipment damage and improving system stability.

[0003] Chinese Patent Publication No. CN 215675270 U discloses an anti-coal-blocking device for a pulverizing system in a thermal power plant, comprising a base and a raw coal hopper. A first coal gate is fixedly installed on the top of the base, an outlet is fixedly installed on the bottom of the first coal gate, a fixed seat is fixedly installed on the bottom of the outlet, a gear is fixedly installed inside the fixed seat, and a conveyor belt is movably installed inside the fixed seat. A housing is fixedly installed on the top of the first coal gate, a motor is fixedly installed on the side wall of the housing, and a stirring blade is fixedly installed at the output end of the motor. This invention dries and disperses wet coal during coal blending, reducing the likelihood of coal sticking during pulverization. A heating chamber is installed on the side wall of the raw coal hopper, through which hot air is circulated to heat the hopper, drying any remaining wet coal. A vibrator shakes the raw coal hopper down, opening the side wall of the hopper and preventing coal blockage.

[0004] However, the above solution still has the following problems: While the vibrators currently in use can play a certain role in breaking up arches and clearing blockages, their operation is crude. Long-term use can easily cause structural damage to components such as conveyor frames and idlers, resulting in metal fatigue and shortening the equipment's lifespan. Existing methods mostly focus on unblocking, while neglecting the proactive recovery and treatment of dust and fine particles, the main culprits of blockages. These materials accumulate continuously during transportation and are the core factor in blockage formation. The lack of an effective online recovery mechanism means that the risk of coal blockage persists. Manual cleaning is not only inefficient and poses safety hazards, but if the cleaned materials are not properly disposed of, they can cause secondary pollution on site, increase the burden of subsequent cleaning, and fail to meet the needs of normal use.

[0005] Therefore, the present invention requires the design of a coal-blocking prevention device for thermal power plants to solve the above-mentioned problems. Summary of the Invention

[0006] The purpose of this invention is to provide an integrated anti-clogging coal-fired power plant device that combines vibration anti-clogging, online dust recovery, and automatic residue crushing. Its core objective is to automate, systematize, and close the anti-clogging process, fundamentally reducing the frequency of coal clogging, extending equipment lifespan, and improving the on-site working environment. This anti-clogging coal-fired power plant device addresses the problems mentioned in the background section.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a coal blockage prevention device for thermal power plants, comprising a support platform, and further comprising: The top of the support platform is equipped with a first fixed frame and a second fixed frame. The second fixed frame is located on one side of the first fixed frame. A conveyor belt mechanism is installed above both the second fixed frame and the first fixed frame. A second drive motor is provided on the outside of the conveyor belt mechanism to cooperate with its operation. Two dust covers are installed above the conveyor belt mechanism. Push plates are slidably connected inside the dust covers. A fixed frame is fixedly connected to the bottom of each push plate. A recycling box extending to the bottom of the dust cover is slidably connected inside each fixed frame. A filter screen is installed at the bottom of the recycling box. Equally spaced recycling pipes are installed at the bottom of the filter screen. A dust blockage recovery bin is fixedly connected to one side of the support platform for use with the conveyor belt mechanism. A conveying bin is fixedly connected to the bottom of the dust blockage recovery bin. An on-site residue treatment box is fixedly connected to the bottom of the conveying bin. A recovery box is fixedly connected to the bottom of the on-site residue treatment box. Two symmetrically distributed crushing rollers are rotatably connected inside the on-site residue treatment box. The top of each of the second fixed frames is equipped with equally spaced support horizontal plates. The top of each support horizontal plate is fixedly connected to a second limiting clamp. The interior of each second limiting clamp is rotatably connected to a second vibrating rod that is symmetrically distributed and located at the bottom of the conveyor belt mechanism. The top of each of the first fixed frames is equipped with a support horizontal plate of the same structure located at the top of the second fixed frame. The top of each support horizontal plate is fixedly connected to a first limiting clamp. The interior of each first limiting clamp is rotatably connected to a first vibrating rod that is symmetrically distributed and located at the bottom of the conveyor belt mechanism. A vibrating motor is installed between each of the two first vibrating rods.

[0008] In a preferred embodiment of the present invention, a counterweight box is fixedly connected to the bottom of the support platform and to one side of the recycling bin, the bottom of the counterweight box is fixedly connected to the support platform, and the bottom of the recycling bin is fixedly connected to the top of the support platform.

[0009] In a preferred embodiment of the present invention, the bottom of the first fixed frame is fixedly connected with equidistant first support seats, and one bottom end of each of the first support seats is fixedly connected to the bottom moisture-proof board.

[0010] In a preferred embodiment of the present invention, the bottom of the second fixing frame is fixedly connected to a second support base that is evenly distributed, and the bottom of each of the second support bases is fixedly connected to a shock-absorbing plate, the bottom of the shock-absorbing plate being fixedly connected to the top of the bottom moisture-proof plate.

[0011] In a preferred embodiment of the present invention, the outer side of the fixed frame is threaded with third positioning bolts that are evenly distributed and cooperate with the positioning of the recycling box. The top of each dust cover is fixedly connected with an electric telescopic rod, the output end of which extends into the corresponding dust cover and is fixedly connected to the top of the push plate.

[0012] In a preferred embodiment of the present invention, the bottom of the dust cover is provided with a limiting groove that slides with the recycling box, and the inside of the recycling box is provided with a fan that works with the recycling pipe to assist in the recycling of residue and dust. The limiting groove is used to allow the recycling box to slide normally.

[0013] In a preferred embodiment of the present invention, two symmetrically distributed bearing sleeves are installed on one side of the on-site residue treatment box. The outer sides of the two bearing sleeves are threaded with first positioning bolts that are equidistantly distributed and extend to the inner wall of the on-site residue treatment box. The multiple first positioning bolts reinforce the connection between the bearing sleeves and the on-site residue treatment box. The inner sides of the two bearing sleeves are rotatably connected with connecting shafts. One end of the connecting shaft extending into the inside of the recycling box is fixedly connected to one end of the corresponding crushing roller. A drive motor is fixedly connected to the outer side of one of the bearing sleeves, and the output end of the drive motor is fixedly connected to one of the connecting shafts.

[0014] In a preferred embodiment of the present invention, a control panel is fixedly connected to the outside of the counterweight box, and the vibration motor, conveyor belt mechanism, drive motor, and electric telescopic rod are all electrically connected to the control panel. In a preferred embodiment of the present invention, the on-site residue treatment box is rotatably connected to two symmetrically distributed gears on the side away from the bearing sleeve. The two gears are meshed together, and the shafts of the two gears are fixedly connected to a connecting shaft of the same structure that extends into the interior of the on-site residue treatment box. The two connecting shafts are fixedly connected to the other end of the crushing roller. The on-site residue treatment box has a discharge chamber at the bottom near the recycling box.

[0015] In a preferred embodiment of the present invention, symmetrically distributed side positioning plates are fixedly connected to both sides of the conveyor belt mechanism and to the top of the bottom moisture-proof plate, and the outer sides of the side positioning plates are threaded with second positioning bolts extending to the inner wall of the corresponding dust cover.

[0016] Compared with the prior art, the beneficial effects of the present invention are: Equipped with a bottom moisture-proof plate, a recycling bin, and a second fixed frame, the crushing process significantly reduces the volume of material, facilitating storage and transportation. The crushed coal powder can be more easily mixed back into the main coal stream for combustion, realizing the resource utilization of waste and avoiding waste. This step completes a closed-loop process from generation to recycling to treatment. From cleaning to crushing, the entire process requires no manual intervention, improving production efficiency and reducing labor intensity and safety hazards. A second drive motor is located on the outside of the conveyor belt mechanism to cooperate with the normal conveying operation. The bottom moisture-proof plate and counterweight box improve the moisture-proof effect while providing overall support to the support platform, thus ensuring the overall stability of the equipment. Multiple first support seats provide auxiliary support to the first fixed frame and also provide primary support to the conveyor belt mechanism. Multiple second support seats provide auxiliary support to the second fixed frame, while also providing secondary support to the entire conveyor belt mechanism. Second positioning bolts reinforce the side positioning plates and dust covers, ensuring the dust covers can be securely installed above the conveyor belt mechanism and facilitating quick disassembly and assembly of parts of the equipment during routine maintenance. The high-frequency, low-amplitude vibration causes far less damage to the conveyor belt and its structure than traditional high-power vibrators. The detachable recycling box and bolted connection design greatly facilitate daily maintenance. The fully enclosed dust cover and internal equipment effectively suppress dust emission, improving the working environment. Centralized treatment and recycling of residues also meet clean production requirements. The design of the counterweight box, bottom moisture-proof plate, multiple support seats, and shock-absorbing plates collectively ensures the stable operation of the entire heavy equipment in complex industrial environments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an anti-coal blockage device for thermal power plants according to the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of an anti-coal blockage device for thermal power plants according to the present invention. Figure 2 ; Figure 3 This is an enlarged schematic diagram of the internal structure of the dust cover of a coal-blocking prevention device for thermal power plants according to the present invention; Figure 4 This is an enlarged schematic diagram of the internal structure of the recovery box of a coal-blocking prevention device for thermal power plants according to the present invention; Figure 5 This invention relates to an anti-coal blockage device for thermal power plants. Figure 1 Enlarged schematic diagram of the structure at point A in the diagram; Figure 6 This invention relates to an anti-coal blockage device for thermal power plants. Figure 4 A magnified schematic diagram of the structure at point B in the diagram.

[0018] In the picture: 1. Bottom moisture-proof board; 11. Counterweight box; 12. Support platform; 13. First fixing frame; 14. Vibration motor; 15. Control panel; 16. Conveyor belt mechanism; 17. First limiting clamp; 18. First vibrator; 19. First support base; 2. Recycling bin; 21. Dust blockage recycling bin; 22. Conveying bin; 23. On-site residue treatment bin; 24. Drive motor; 25. Crushing roller; 26. Gear; 27. Connecting shaft; 28. Bearing sleeve; 29. ​​First positioning bolt; 3. Second fixing frame; 31. Second support base; 32. Shock-absorbing plate; 33. Supporting cross plate; 34. Second limiting clamp; 35. Second vibrating rod; 4. Dust cover; 41. Side positioning plate; 42. Electric telescopic rod; 43. Second positioning bolt; 44. Push plate; 45. Fixing frame; 46. Recycling box; 47. Filter screen; 48. Recycling pipe; 49. Third positioning bolt. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-6 The present invention provides a technical solution: a coal-blocking prevention device for thermal power plants, including a support platform 12, and further including: a first fixed frame 13 and a second fixed frame 3 installed on the top of the support platform 12, the second fixed frame 3 being located on one side of the first fixed frame 13, a conveyor belt mechanism 16 installed above both the second fixed frame 3 and the first fixed frame 13, a second drive motor cooperating with the conveyor belt mechanism 16 being provided on the outside of the conveyor belt mechanism 16, two dust covers 4 installed above the conveyor belt mechanism 16, a push plate 44 slidably connected inside the dust cover 4, a fixed frame 45 fixedly connected to the bottom of the push plate 44, a recycling box 46 extending to the bottom of the dust cover 4 slidably connected inside the fixed frame 45, a filter screen 47 installed at the bottom of the recycling box 46, and recycling pipes 48 evenly distributed at the bottom of the filter screen 47; In this scheme, a dust blockage recovery bin 21 is fixedly connected to one side of the support platform 12 and is used in conjunction with the conveyor belt mechanism 16. A conveying bin 22 is fixedly connected to the bottom of the dust blockage recovery bin 21. An on-site residue treatment box 23 is fixedly connected to the bottom of the conveying bin 22. A recovery box 2 is fixedly connected to the bottom of the on-site residue treatment box 23. Two symmetrically distributed crushing rollers 25 are rotatably connected inside the on-site residue treatment box 23. In this design, the top of each of the second fixed frames 3 is equipped with equally spaced support horizontal plates 33, and the top of each support horizontal plate 33 is fixedly connected to a second limiting clamp 34. The interior of each second limiting clamp 34 is rotatably connected to a symmetrically distributed second vibrating rod 35 located at the bottom of the conveyor belt mechanism 16. The top of each of the first fixed frames 13 is equipped with a support horizontal plate 33 of the same structure located at the top of the second fixed frame 3, and the top of each support horizontal plate 33 is fixedly connected to a first limiting clamp 17. The interior of each first limiting clamp 17 is rotatably connected to a symmetrically distributed first vibrating rod 18 located at the bottom of the conveyor belt mechanism 16, and a vibrating motor 14 is installed between each of the two first vibrating rods 18.

[0021] Please see Figures 1-5 In this scheme, a counterweight box 11 is fixedly connected to the bottom of the support platform 12 and to one side of the recycling box 2. The bottom of the counterweight box 11 is fixedly connected to the support platform 12. The bottom of the recycling box 2 is fixedly connected to the top of the support platform 12. The bottom moisture-proof plate 1 and the counterweight box 11 are used to improve the moisture-proof effect and support the support platform 12 as a whole, thereby ensuring the overall stability of the equipment operation.

[0022] In this scheme, the bottom of the first fixed frame 13 is fixedly connected with equidistantly distributed first support seats 19. One end of the bottom of each first support seat 19 is fixedly connected to the bottom moisture-proof plate 1. The first fixed frame 13 is supported by multiple first support seats 19, and at the same time, the conveyor belt mechanism 16 is supported.

[0023] In this scheme, the bottom of the second fixed frame 3 is fixedly connected with equidistantly distributed second support seats 31. The bottom of each second support seat 31 is fixedly connected with a shock-absorbing plate 32. The bottom of the shock-absorbing plate 32 is fixedly connected to the top of the bottom moisture-proof plate 1. The second fixed frame 3 is provided with auxiliary support by multiple second support seats 31, and at the same time, it provides secondary support for the conveyor belt mechanism 16.

[0024] Please see Figures 1-4 In this scheme, the outer side of the fixed frame 45 is threaded with third positioning bolts 49 that are evenly distributed and cooperate with the limit of the recycling box 46. The top of the dust cover 4 is fixedly connected with an electric telescopic rod 42. The output end of the electric telescopic rod 42 extends into the corresponding dust cover 4 and is fixedly connected to the top of the push plate 44. By operating the electric telescopic rod 42, the push plate 44 is driven to move downward, so that the fixed frame 45 and the recycling box 46 move downward until they are located on the surface of the conveyor belt mechanism 16, which helps to remove residual dust and reduce the subsequent coal blockage.

[0025] In this solution, the bottom of the dust cover 4 is provided with a limiting groove that slides with the recycling box 46. The inside of the recycling box 46 is provided with a fan that works with the recycling pipe 48 to assist in the recycling of residue and dust. The limiting groove is used to allow the recycling box 46 to slide normally, thereby facilitating the disassembly and cleaning of the recycling box 46 as a whole.

[0026] Please see Figures 1-6 In this solution, two symmetrically distributed bearing sleeves 28 are installed on one side of the on-site residue treatment box 23. The outer sides of the two bearing sleeves 28 are threaded with first positioning bolts 29 that are equidistantly distributed and extend to the inner wall of the on-site residue treatment box 23. The multiple first positioning bolts 29 reinforce the connection between the bearing sleeves 28 and the on-site residue treatment box 23. The inner sides of the two bearing sleeves 28 are rotatably connected with connecting shafts 27. The end of the connecting shaft 27 extending into the recycling box 2 is fixedly connected to one end of the corresponding crushing roller 25. The outer side of one of the bearing sleeves 28 is fixedly connected with a drive motor 24. The output end of the drive motor 24 is fixedly connected to one of the connecting shafts 27. When the drive motor 24 runs, it drives one crushing roller 25 inside the on-site residue treatment box 23 to rotate under the connection of the two connecting shafts 27 on the same side. Since the two gears 26 are meshed, they will drive another crushing roller 25 inside the on-site residue treatment box 23 to rotate through the other connecting shaft 27, thereby achieving the crushing treatment of the residue and dust collected inside the on-site residue treatment box 23, which facilitates subsequent unified cleaning.

[0027] In this scheme, a control panel 15 is fixedly connected to the outside of the counterweight box 11. The vibrating motor 14, the conveyor belt mechanism 16, the drive motor 24, and the electric telescopic rod 42 are all electrically connected to the control panel 15. The control panel 15 is used to control the operation of the vibrating motor 14, the conveyor belt mechanism 16, the drive motor 24, and the electric telescopic rod 42, thereby realizing the unified management of the power equipment.

[0028] Please see Figures 1-6 In this scheme, the on-site residue treatment box 23 is rotatably connected to two symmetrically distributed gears 26 on the side away from the bearing sleeve 28. The two gears 26 are meshed and connected. The shafts of the two gears 26 are fixedly connected to the connecting shafts 27 of the same structure that extend into the interior of the on-site residue treatment box 23. The two connecting shafts 27 are fixedly connected to the other end of the crushing roller 25. The on-site residue treatment box 23 is provided with a discharge chamber near the bottom of the recycling box 2, so as to cooperate with the normal recycling and discharge of residue and dust.

[0029] In this solution, symmetrically distributed side positioning plates 41 are fixedly connected to both sides of the conveyor belt mechanism 16 and to the top of the bottom moisture-proof plate 1. The outer side of each side positioning plate 41 is threaded with a second positioning bolt 43 extending to the inner wall of the corresponding dust cover 4. The side positioning plate 41 and the dust cover 4 are reinforced by the second positioning bolt 43, thereby ensuring that the dust cover 4 can be stably installed above the conveyor belt mechanism 16, and at the same time facilitating the quick disassembly and assembly of some equipment during daily maintenance.

[0030] In this solution, the vibration equipment makes the dust easier to recycle, creating conditions for recycling. The recycling equipment gathers the dispersed dust, providing a processing object for subsequent crushing, thus completing a closed loop. This is an ultimate effect that cannot be achieved by a single component or simple combination. The control panel 15 has a preset PLC control program with the following control logic: after the conveyor belt mechanism 16 starts, the vibrating motor 14 starts synchronously; the electric telescopic rod 42 descends once every T1 time interval (e.g., 30 minutes) and continues for T2 time interval (e.g., 2 minutes), at which time the fan in the recycling box 46 starts synchronously; when the current value of the drive motor 24 exceeds the set threshold (indicating that there is too much material in the processing box), the control panel 15 automatically increases its operating power to the crushing mode.

[0031] Please see Figures 1-6 The working principle of this invention is as follows: It is equipped with a bottom moisture-proof plate 1, a recycling bin 2, and a second fixing bracket 3. When in use, open the control panel 15: 1. Initial anti-clogging and adhesion reduction stage: Actuating components: First vibrating rod 18, second vibrating rod 35, vibration motor 14; Working principle: A vibrating motor 14 with the same structure is installed between the two first vibrating bars 18. The first and second vibrating bars 35, installed at the bottom of the conveyor belt mechanism 16, generate high-frequency, low-amplitude micro-vibrations under the drive of the vibrating motor 14. The vibration is transmitted to the coal material on the conveyor belt. The effect is: Disrupting initial adhesion: At the initial stage of the contact between pulverized coal and the conveyor belt, micro-vibration can effectively disrupt the static friction and prevent the materials from sticking together; Reduce overall cohesion: Keep the coal in a loose state during transportation, reduce the possibility of internal arching, physically change the mechanical state of the material, and create favorable conditions for subsequent cleaning. 2. Online cleaning and dust recovery stage: Actuating components: electric telescopic rod 42, push plate 44, fixed frame 45, recycling box 46, filter screen 47, recycling pipe 48, fan; Working principle: Positioning and cleaning: The control panel 15 starts the electric telescopic rod 42 at a timer or according to preset logic, pushing the push plate 44 downward so that the filter screen 47 at the bottom of the recycling box 46 gently contacts the surface of the conveyor belt; Negative pressure adsorption: The fan inside the recovery box 46 starts, generating negative pressure adsorption force through the filter 47. Loose dust and fine particles on the conveyor belt are directly sucked into the recovery box 46; Pneumatic conveying: The sucked-in material is conveyed through the recovery pipe 48 to the dust blockage recovery bin 21 located at the end of the system under the action of airflow; Technical benefits: It enables online cleaning of dust, the main clogging agent, without the need to stop the machine, and avoids the dust problem caused by manual cleaning. The filter screen 47 allows airflow to pass through while blocking materials, ensuring recycling efficiency. 3. Centralized treatment and resource utilization preparation stage for residues: Components: Dust blockage recovery bin 21, conveying bin 22, on-site residue treatment bin 23, drive motor 24, crushing roller 25, gear 26; Working principle: Centralized collection: Dust and residue collected from various recycling points are temporarily stored in the dust blockage recovery bin 21 and then conveyed to the on-site residue treatment bin 23 via the conveyor bin 22. Crushing and volume reduction: The drive motor 24 drives two symmetrically distributed crushing rollers 25 to rotate in opposite directions via a connecting shaft 27 and a pair of meshing gears 26. The incoming residue is squeezed and sheared by the crushing rollers 25, turning it into powder with a smaller particle size; Unified discharge: The crushed material falls into the final recycling box 2 through the discharge chamber at the bottom of the on-site residue treatment box 23; Technical benefits: The crushing process significantly reduces the volume of materials, facilitating storage and transportation. The crushed coal powder can be more easily mixed back into the main coal stream for combustion, realizing the resource utilization of waste and avoiding waste. This step completes a closed loop from generation to recycling to treatment. From cleaning to crushing, the entire process requires no manual intervention, improving production efficiency and reducing labor intensity and safety hazards. A second drive motor is provided on the outer side of the conveyor belt mechanism 16 to cooperate with the normal conveying operation of the conveyor belt. The bottom moisture-proof plate 1 and the counterweight box 11 improve the moisture-proof effect and provide overall support for the support platform 12, thereby ensuring the overall stability of the equipment. Multiple first support seats 19 provide auxiliary support for the first fixed frame 13 and provide primary support for the conveyor belt mechanism 16. Multiple second support seats 31 provide auxiliary support for the second fixed frame 3 and provide secondary support for the conveyor belt mechanism 16. The control panel 15 is used to control the operation of the vibrating motor 14, the conveyor belt mechanism 16, the drive motor 24, and the electric telescopic rod 42, realizing unified management of the electrical equipment. The side positioning plate 41 and the dust cover 4 are reinforced and connected by the second positioning bolt 43, so that the dust cover 4 can be stably installed above the conveyor belt mechanism 16 and facilitates quick disassembly and assembly of some parts of the equipment during daily maintenance. High-frequency, low-amplitude vibration causes far less damage to the conveyor belt and its structure than traditional high-power vibrators; the detachable recycling box 46 and the bolted connection design greatly facilitate daily maintenance and upkeep; the fully enclosed dust cover 4 and internal equipment effectively suppress dust emission and improve the working environment; the centralized treatment and recycling of residues also meet the requirements of clean production; the design of the counterweight box 11, bottom moisture-proof plate 1, multiple support seats and shock-absorbing plate 32 together ensure the stable operation of the entire set of heavy equipment in complex industrial environments.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coal-blocking prevention device for thermal power plants, comprising a support platform (12), characterized in that, Also includes: The support platform (12) is equipped with a first fixed frame (13) and a second fixed frame (3) on its top. A conveyor belt mechanism (16) is installed above both the second fixed frame (3) and the first fixed frame (13). Two dust covers (4) are installed above the conveyor belt mechanism (16). Push plates (44) are slidably connected inside the dust covers (4). Fixed frames (45) are fixedly connected to the bottom of the push plates (44). Recycling boxes (46) extending to the bottom of the dust covers (4) are slidably connected inside the fixed frames (45). Filter screens (47) are installed at the bottom of the recycling boxes (46). Recycling pipes (48) are evenly distributed at the bottom of the filter screens (47). A dust blockage recovery bin (21) for use with a conveyor belt mechanism (16) is fixedly connected to one side of the support platform (12). A conveying bin (22) is fixedly connected to the bottom of the dust blockage recovery bin (21). A field residue treatment box (23) is fixedly connected to the bottom of the conveying bin (22). A recovery box (2) is fixedly connected to the bottom of the field residue treatment box (23). Two symmetrically distributed crushing rollers (25) are rotatably connected inside the field residue treatment box (23). The top of the second fixed frame (3) is equipped with equidistant support horizontal plates (33), and the top of the support horizontal plates (33) is fixedly connected with a second limiting clamp (34). The interior of the second limiting clamp (34) is rotatably connected with a second vibrating rod (35) that is symmetrically distributed and located at the bottom of the conveyor belt mechanism (16).

2. The anti-coal-blocking device for thermal power plants according to claim 1, characterized in that: The top of the first fixed frame (13) is equipped with a support plate (33) of the same structure as the top of the second fixed frame (3). The top of the support plate (33) is fixedly connected with a first limiting clamp (17). The inside of the first limiting clamp (17) is rotatably connected with a first vibrating rod (18) that is symmetrically distributed and located at the bottom of the conveyor belt mechanism (16). A vibrating motor (14) is installed between the two first vibrating rods (18). The bottom of the support platform (12) and one side of the recycling box (2) is fixedly connected with a counterweight box (11). The bottom of the counterweight box (11) is fixedly connected with the support platform (12). The bottom of the recycling box (2) is fixedly connected to the top of the support platform (12).

3. The anti-coal-blocking device for thermal power plants according to claim 2, characterized in that: The bottom of the first fixed frame (13) is fixedly connected with equidistant first support seats (19), and one end of the bottom of each of the first support seats (19) is fixedly connected to the bottom moisture-proof board (1).

4. The anti-coal-blocking device for thermal power plants according to claim 3, characterized in that: The bottom of the second fixed frame (3) is fixedly connected with second support seats (31) distributed at equal intervals. The bottom of each of the second support seats (31) is fixedly connected with a shock-absorbing plate (32). The bottom of the shock-absorbing plate (32) is fixedly connected to the top of the bottom moisture-proof plate (1).

5. The anti-coal-blocking device for thermal power plants according to claim 2, characterized in that: The outer side of the fixed frame (45) is threaded with third positioning bolts (49) that are evenly distributed and cooperate with the recycling box (46) for positioning. The top of each dust cover (4) is fixedly connected with an electric telescopic rod (42). The output end of the electric telescopic rod (42) extends into the corresponding dust cover (4) and is fixedly connected to the top of the push plate (44).

6. The anti-coal-blocking device for thermal power plants according to claim 5, characterized in that: The bottom of the dust cover (4) is provided with a limiting groove that slides with the recycling box (46), and the inside of the recycling box (46) is provided with a fan that works with the recycling pipe (48).

7. The anti-coal blockage device for thermal power plants according to claim 5, characterized in that: Two symmetrically distributed bearing sleeves (28) are installed on one side of the on-site residue treatment box (23). The outer sides of the two bearing sleeves (28) are threaded with first positioning bolts (29) that are evenly distributed and extend to the inner wall of the on-site residue treatment box (23). The inner sides of the two bearing sleeves (28) are rotatably connected with connecting shafts (27). One end of the connecting shaft (27) extending into the recycling box (2) is fixedly connected to one end of the corresponding crushing roller (25). A drive motor (24) is fixedly connected to the outer side of one of the bearing sleeves (28). The output end of the drive motor (24) is fixedly connected to one of the connecting shafts (27).

8. The anti-coal blockage device for thermal power plants according to claim 7, characterized in that: The control panel (15) is fixedly connected to the outside of the counterweight box (11). The vibration motor (14), conveyor belt mechanism (16), drive motor (24) and electric telescopic rod (42) are all electrically connected to the control panel (15).

9. The anti-coal-blocking device for thermal power plants according to claim 8, characterized in that: The on-site residue treatment box (23) is rotatably connected to two symmetrically distributed gears (26) on the side away from the bearing sleeve (28). The two gears (26) are meshed together, and the shafts of the two gears (26) are fixedly connected to a connecting shaft (27) of the same structure that extends into the interior of the on-site residue treatment box (23). The two connecting shafts (27) are fixedly connected to the other end of the crushing roller (25).

10. The anti-coal-blocking device for thermal power plants according to claim 8, characterized in that: On both sides of the conveyor belt mechanism (16) and at the top of the bottom moisture-proof plate (1), there are symmetrically distributed side positioning plates (41). The outer side of each side positioning plate (41) is threaded with a second positioning bolt (43) extending to the inner wall of the corresponding dust cover (4).

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