A coal-fired power plant raw coal bunker adjacent bunker intercommunication device

Abstract

This invention relates to the technical field of coal-fired power plant coal switching equipment, and particularly to a coal-fired power plant raw coal bunker inter-bundle interconnection device. The device includes a base, with two sets of raw coal bunkers symmetrically arranged at the top two edges of the base; a conveyor trough is formed at the top center of the base; a conveyor belt is installed within the conveyor trough; an observation camera is installed at one edge of the top of the base; and a cleaning mechanism is installed in each set of raw coal bunkers. The two sets of raw coal bunkers of this invention are respectively filled with high-calorific-value coal and low-calorific-value coal. When it is necessary to increase the unit's load-carrying capacity, the corresponding shaftless spiral impeller in the coal cutting mechanism can be controlled to rotate to remove the high-calorific-value coal from the corresponding raw coal bunker. When it is necessary to reduce the unit's load-carrying capacity, the corresponding shaftless spiral impeller in the coal cutting mechanism can be controlled to rotate to transfer the low-calorific-value coal from the adjacent bunker to the conveyor belt. The process is simple and quick, improving the efficiency of coal type switching.

Description

Technical Field

[0001] This invention belongs to the technical field of coal-fired power plant coal switching equipment, and specifically relates to an inter-compartmental communication device for raw coal bunkers in coal-fired power plants. Background Technology

[0002] Thermal power generation is one of the most common power generation methods in the world today. In thermal power generation, raw coal is mostly used to generate heat. Therefore, thermal power plants have a large demand for raw coal, and raw coal bunkers are equipment used to store raw coal.

[0003] A search revealed that in the prior art, Chinese Patent Publication No. CN221274092U, published on July 5, 2024, discloses a raw coal bunker unloading device. This device includes a raw coal bunker unloading pipe, a dust-proof assembly on the surface of the unloading pipe, an output device on the surface of the dust-proof assembly, and an anti-blocking mechanism on the surface of the output device. The anti-blocking mechanism is connected to the dust-proof assembly and the raw coal bunker unloading pipe. The dust-proof assembly includes a sealing cap, an inlet pipe, and bolts. A sealing cap is fitted onto the top surface of the raw coal bunker unloading pipe, and the inlet pipe passes through the top of the sealing cap. Bolts are threadedly connected between the inlet pipe and the raw coal bunker unloading pipe. This invention, through the cooperation of the raw coal bunker unloading pipe and dust-proof assembly, allows the device to intercept fine dust during the unloading process, keeping it inside the raw coal bunker unloading pipe. This solves the problem of dust scattering to the outside environment and affecting human health associated with existing devices.

[0004] However, the device still has the following defects:

[0005] The load-carrying capacity required by the power grid dispatch varies at different times. In order to improve the economy of combustion, high-calorific-value coal needs to be used during high load and low-calorific-value coal needs to be used during low load. However, if the existing pulverizing system wants to quickly blend another type of coal, it needs to burn out the coal stored in the corresponding raw coal silo and then add coal again, which lacks the efficiency of switching coal types. Summary of the Invention

[0006] To address the above problems, the present invention provides a raw coal bunker interconnection device for coal-fired power plants, including a base, wherein two sets of raw coal bunkers are symmetrically arranged at the top two sides of the base.

[0007] A conveyor trough is provided at the top center of the base; a conveyor belt is provided inside the conveyor trough; an observation camera is provided at one side edge of the top of the base; and a cleaning mechanism is provided in each set of raw coal bunkers.

[0008] An anti-blocking mechanism is provided between the two sets of raw coal bunkers; a coal cutting mechanism is provided below the anti-blocking mechanism; the two ends of the coal cutting mechanism respectively penetrate into the corresponding set of raw coal bunkers;

[0009] When it is necessary to increase the unit's load capacity, the control coal cutting mechanism will transfer high-calorific-value coal from the corresponding raw coal bunker to the conveyor belt. When it is necessary to reduce the unit's load capacity, the control coal cutting mechanism will transfer low-calorific-value coal from the corresponding raw coal bunker to the conveyor belt.

[0010] Furthermore, four sets of extension plates are symmetrically arranged on the two side walls of the base; a scraper is provided between each pair of adjacent sets of extension plates; each set of scrapers is movable and abuts against the outer wall of the conveyor belt.

[0011] Furthermore, the base has two sets of telescopic grooves symmetrically arranged at its bottom; each set of telescopic grooves has several sets of hydraulic cylinders at the top inner edge; each set of hydraulic cylinders has a set of traveling wheels connected to its output end; and the bottom inner wall of the conveying groove is equipped with a level sensor.

[0012] Furthermore, the cleaning mechanism includes a rotating shaft; a first cleaning frame, a second cleaning frame, and a third cleaning frame are sequentially arranged from bottom to top on the outer wall of the rotating shaft; the side walls of the first cleaning frame, the second cleaning frame, and the third cleaning frame are all movably abutting against the inner wall of the raw coal bunker; the third cleaning frame is sleeved on the outer wall of the rotating shaft; the first cleaning frame and the second cleaning frame are movably sleeved on the outer wall of the rotating shaft.

[0013] Furthermore, the bottom of the third cleaning frame is provided with two sets of first magnets; the top and bottom of the second cleaning frame are respectively provided with two sets of second magnets; the top of the first cleaning frame is provided with two sets of third magnets; the bottom of each set of first magnets is movably abutting against the top of the corresponding two sets of second magnets; the top of each set of third magnets is movably abutting against the bottom of the corresponding two sets of second magnets.

[0014] Furthermore, two sets of U-shaped connecting frames are symmetrically arranged on the inner walls of both sides of the second cleaning frame; four sets of movable grooves are symmetrically opened on the inner walls of both sides of the second cleaning frame; each set of movable grooves is provided with a set of elastic scrapers; one end of two adjacent sets of elastic scrapers moves and abuts together.

[0015] Furthermore, the anti-blocking mechanism includes an installation pipe; both ends of the installation pipe are respectively connected to the outer wall of a corresponding set of raw coal bunkers; two sets of electric sliding tables are symmetrically arranged on the top and bottom inner walls of the installation pipe; the output ends of the two sets of electric sliding tables are connected to an installation plate; several sets of air cannon vibrators are symmetrically arranged on the two side walls of the installation plate.

[0016] Furthermore, the coal cutting mechanism includes a connecting pipe; two sets of feed pipes are symmetrically arranged on the two side walls of the connecting pipe; the end of each set of feed pipes away from the connecting pipe extends into a corresponding set of raw coal bunkers, and a feed chute is opened on the side wall; the end of each set of feed pipes near the connecting pipe extends into the connecting pipe, and a discharge chute is opened on the side wall.

[0017] Furthermore, each set of feed pipes is equipped with a set of shaftless spiral impellers; the bottom of the connecting pipe is equipped with a discharge pipe; each set of feed pipes is equipped with a set of one-way bearings at one end near the connecting pipe; each set of one-way bearings is connected to the corresponding set of shaftless spiral impellers in a drive connection.

[0018] Furthermore, each set of shaftless spiral impellers is connected to a set of first bevel gears at the end away from the corresponding set of feed pipes; a motor housing is provided at the top of the connecting pipe; a variable frequency motor is provided inside the motor housing; the output end of the variable frequency motor extends into the connecting pipe and is connected to a second bevel gear; the second bevel gear is meshed with both sets of first bevel gears.

[0019] The beneficial effects of this invention are:

[0020] 1. Two sets of raw coal bunkers are respectively loaded with high-calorific-value coal and low-calorific-value coal. When it is necessary to increase the load-carrying capacity of the unit, the rotation of the corresponding shaftless spiral impeller in the coal cutting mechanism can be controlled to remove the high-calorific-value coal from the corresponding raw coal bunker. When it is necessary to reduce the load-carrying capacity of the unit, the rotation of the corresponding shaftless spiral impeller in the coal cutting mechanism can be controlled to transfer the low-calorific-value coal in the adjacent bunker to the conveyor belt. The process is simple and quick, improving the efficiency of switching coal types.

[0021] 2. When the coal in the raw coal bunker is consumed to a certain extent, the third cleaning frame is fully exposed. At this time, the rotating shaft can be controlled to drive the third cleaning frame to clean the inner wall of the raw coal bunker. When the coal in the raw coal bunker continues to be consumed, the second cleaning frame is fully exposed. When the third cleaning frame rotates, it will drive the second cleaning frame to rotate and clean the inner wall of the raw coal bunker through the magnetic attraction of the first and second magnets. Similarly, when the coal is completely consumed, the first cleaning frame can also clean the inner wall of the raw coal bunker. This avoids the existing situation where the raw coal bunker can only be cleaned after the coal is completely consumed, thus improving the cleaning efficiency of the raw coal bunker.

[0022] 3. When the coal cutting mechanism is performing coal extraction from the corresponding raw coal bin, the camera monitors the discharge status of the feeding end of the coal cutting mechanism. When the discharge from the feeding end of the coal cutting mechanism is abnormal, two sets of electric slides can be controlled to move the mounting plate toward the raw coal bin where the abnormality occurs. Then, several sets of air cannon vibrators are controlled to fire air cannons at the raw coal bin, causing the raw coal bin to vibrate and clear the blockage, thus avoiding the problem of easy blockage in the existing raw coal bin.

[0023] 4. When both sets of raw coal bunkers are empty, several sets of hydraulic cylinders can be controlled to drive the corresponding traveling wheels to descend and press against the ground, thus raising the base. At this time, the coal cutting device can be moved. After moving to the corresponding position, the base can be pressed against the ground again, avoiding the problem of the existing raw coal bunkers being inconvenient to move. At the same time, during the movement, the horizontal status of the base is monitored by a level sensor, and then the corresponding hydraulic cylinders are individually controlled to adjust the base to keep it horizontal, preventing the coal cutting device from tipping over when moving on uneven ground. This improves both ease of use and stability.

[0024] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the structure of a coal cutting device according to an embodiment of the present invention is shown;

[0027] Figure 2 A cross-sectional schematic diagram of a coal cutting device according to an embodiment of the present invention is shown;

[0028] Figure 3 A schematic diagram of the cleaning mechanism according to an embodiment of the present invention is shown;

[0029] Figure 4 A right-side schematic view of a cleaning mechanism according to an embodiment of the present invention is shown;

[0030] Figure 5 A cross-sectional schematic diagram of an anti-blocking mechanism according to an embodiment of the present invention is shown;

[0031] Figure 6 A schematic diagram of the coal cutting mechanism according to an embodiment of the present invention is shown;

[0032] Figure 7 A cross-sectional schematic diagram of a coal cutting mechanism according to an embodiment of the present invention is shown;

[0033] Figure 8 A schematic diagram of the installation of a coal cutting mechanism according to an embodiment of the present invention is shown.

[0034] In the diagram: 1. Base; 2. Raw coal bunker; 3. Conveying trough; 4. Conveyor belt; 5. Extension plate; 6. Scraper; 7. Observation camera; 8. Cleaning mechanism; 9. Anti-blocking mechanism; 10. Coal cutting mechanism; 11. Telescopic trough; 12. Hydraulic cylinder; 13. Traveling wheel; 14. Horizontal sensor; 801. Rotating shaft; 802. First cleaning frame; 803. Second cleaning frame; 804. Third cleaning frame; 805. First magnet; 806. Second magnet; 807. Third magnet; 808. U-shaped connecting frame; 809, elastic scraper; 810, movable groove; 901, mounting pipe; 902, electric slide table; 903, mounting plate; 904, air cannon vibrator; 1001, connecting pipe; 1002, feed pipe; 1003, discharge pipe; 1004, feed chute; 1005, shaftless spiral impeller; 1006, motor box; 1007, discharge chute; 1008, one-way bearing; 1009, first bevel gear; 1010, variable frequency motor; 1011, second bevel gear. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0036] This invention provides an interconnection device between adjacent raw coal bunkers in a coal-fired power plant, including a base 1. For example, as shown... Figure 1 , Figure 2 , Figure 8 As shown, two sets of raw coal bins 2 are symmetrically arranged on the top two sides of the base 1; a conveyor trough 3 is opened at the top center of the base 1; a conveyor belt 4 is installed in the conveyor trough 3; four sets of extension plates 5 are symmetrically arranged on the two side walls of the base 1; a scraper 6 is provided between each pair of adjacent sets of extension plates 5; each set of scrapers 6 is movable and abuts against the outer wall of the conveyor belt 4; an observation camera 7 is provided on one side edge of the top of the base 1; a cleaning mechanism 8 is provided in each set of raw coal bins 2; an anti-blocking mechanism 9 is provided between the two sets of raw coal bins 2; a coal cutting mechanism 10 is provided below the anti-blocking mechanism 9; the two ends of the coal cutting mechanism 10 respectively penetrate into the corresponding set of raw coal bins 2; two sets of telescopic grooves 11 are symmetrically opened at the bottom of the base 1; several sets of hydraulic cylinders 12 are provided at the top inner wall edge of each set of telescopic grooves 11; a set of walking wheels 13 are driven to the output end of each set of hydraulic cylinders 12; a level sensor 14 is provided on the bottom inner wall of the conveyor trough 3.

[0037] When both sets of raw coal bunkers are empty, several sets of hydraulic cylinders 12 can be controlled to drive the corresponding traveling wheels 13 to descend and press against the ground, thus raising the base 1. At this time, the coal cutting device can be moved. After moving to the corresponding position, the base 1 can be pressed against the ground again, avoiding the problem of the existing raw coal bunkers being inconvenient to move. At the same time, during the movement, the horizontal status of the base 1 is monitored by the level sensor 14, and then the corresponding hydraulic cylinder 12 is individually controlled to adjust and keep the base 1 horizontal, preventing the coal cutting device from tipping over when moving on uneven ground. This improves both ease of use and stability. Two sets of raw coal bunkers 2 are respectively loaded with high-calorific-value coal and low-calorific-value coal. When it is necessary to increase the unit's load capacity, the coal cutting mechanism 10 can be controlled to transfer the high-calorific-value coal in the corresponding raw coal bunker 2 to the conveyor belt 4. When it is necessary to reduce the unit's load capacity, the coal cutting mechanism 10 can be controlled to transfer the low-calorific-value coal in the corresponding raw coal bunker 2 to the conveyor belt 4. The conveyor belt 4 transfers the coal to the next process. The scraper 6 can scrape off the coal debris attached to the conveyor belt 4. During the coal unloading operation, the observation camera 7 can monitor the feeding end of the coal cutting mechanism 10. When an abnormal discharge from the feeding end is detected, the anti-blocking mechanism 9 can be controlled to clear the blockage.

[0038] For example, such as Figure 3 and Figure 4 As shown, the cleaning mechanism 8 includes a rotating shaft 801; a first cleaning frame 802, a second cleaning frame 803, and a third cleaning frame 804 are sequentially arranged from bottom to top on the outer wall of the rotating shaft 801; the two side walls of the first cleaning frame 802, the second cleaning frame 803, and the third cleaning frame 804 are all movably abutting against the inner wall of the raw coal bunker 2; the third cleaning frame 804 is sleeved on the outer wall of the rotating shaft 801; the first cleaning frame 802 and the second cleaning frame 803 are movably sleeved on the outer wall of the rotating shaft 801; two sets of first magnets 805 are provided at the bottom of the third cleaning frame 804; the top and bottom of the second cleaning frame 803 are respectively provided with... There are two sets of second magnets 806; the top of the first cleaning frame 802 is provided with two sets of third magnets 807; the bottom of each set of first magnets 805 is movably abutting against the top of the corresponding two sets of second magnets 806; the top of each set of third magnets 807 is movably abutting against the bottom of the corresponding two sets of second magnets 806; two sets of U-shaped connecting frames 808 are symmetrically provided on the inner walls of both sides of the second cleaning frame 803; four sets of movable grooves 810 are symmetrically opened on the inner walls of both sides of the second cleaning frame 803; each set of movable grooves 810 is provided with a set of elastic scrapers 809; one end of two adjacent sets of elastic scrapers 809 is movably abutting against each other.

[0039] When the coal in the raw coal bunker 2 is consumed to a certain extent, the third cleaning frame 804 is fully exposed. At this time, the rotating shaft 801 can be controlled to drive the third cleaning frame 804 to clean and scrape off the attached coal dust from the inner wall of the raw coal bunker 2. Since the first cleaning frame 802 and the second cleaning frame 803 are both movably sleeved on the outer wall of the rotating shaft 801, they are not affected by the rotation of the rotating shaft 801. However, when the coal in the raw coal bunker 2 continues to be consumed, after the second cleaning frame 803 is fully exposed, the rotation of the third cleaning frame 804 will drive the second cleaning frame 803 to rotate and clean the inner wall of the raw coal bunker 2 through the magnetic attraction of the first magnet 805 and the second magnet 806. Similarly, when the coal is completely consumed, the first cleaning frame 802 can also clean the inner wall of the raw coal bunker 2, avoiding the existing situation where the raw coal bunker 2 can only be cleaned after the coal is completely consumed, thus improving the cleaning efficiency of the raw coal bunker 2.

[0040] For example, such as Figure 5 As shown, the anti-blocking mechanism 9 includes an installation pipe 901; both ends of the installation pipe 901 are respectively connected to the outer wall of a corresponding set of raw coal bunkers 2; two sets of electric slides 902 are symmetrically arranged on the top and bottom inner walls of the installation pipe 901; an installation plate 903 is drivenly connected to the output end of the two sets of electric slides 902; several sets of air cannon vibrators 904 are symmetrically arranged on the two side walls of the installation plate 903.

[0041] When the coal cutting mechanism 10 is performing coal extraction from the raw coal bunker 2, the observation camera 7 monitors the discharge status of the feeding end of the coal cutting mechanism 10. When the discharge from the feeding end of the coal cutting mechanism 10 is abnormal, the two sets of electric sliding tables 902 can be controlled to move the mounting plate 903 toward the raw coal bunker 2 where the abnormality occurs. Then, the corresponding sets of air cannon vibrators 904 are controlled to fire air cannons at the raw coal bunker 2, causing the raw coal bunker 2 to vibrate and clear the blockage, thus avoiding the problem of easy blockage in the existing raw coal bunker 2.

[0042] For example, such as Figure 6 and Figure 7As shown, the coal cutting mechanism 10 includes a connecting pipe 1001; two sets of feed pipes 1002 are symmetrically arranged on both sides of the connecting pipe 1001; the end of each set of feed pipes 1002 away from the connecting pipe 1001 extends into a corresponding set of raw coal bins 2, and a feed chute 1004 is opened on the side wall; the end of each set of feed pipes 1002 near the connecting pipe 1001 extends into the connecting pipe 1001, and a discharge chute 1007 is opened on the side wall; a set of shaftless spiral impellers 1005 is provided in each set of feed pipes 1002; a discharge pipe 1003 is provided at the bottom of the connecting pipe 1001; the end of each set of feed pipes 1002 near the connecting pipe 1001 extends into the connecting pipe 1001, and a discharge chute 1007 is opened on the side wall; a set of shaftless spiral impellers 1005 is provided in each set of feed pipes 1002; a discharge pipe 1003 is provided at the bottom of the connecting pipe 1001; a set of feed pipes 1002 near the connecting pipe 1001 extends into the connecting pipe 1001. One end of each tube 1001 is provided with a set of one-way bearings 1008; each set of one-way bearings 1008 is drivenly connected to a corresponding set of shaftless spiral impellers 1005; the end of each set of shaftless spiral impellers 1005 away from the corresponding set of feed tubes 1002 is drivenly connected to a set of first bevel gears 1009; the top of the connecting tube 1001 is provided with a motor housing 1006; the motor housing 1006 is provided with a variable frequency motor 1010; the output end of the variable frequency motor 1010 extends into the connecting tube 1001 and is drivenly connected to a second bevel gear 1011; the second bevel gear 1011 is meshed with both sets of first bevel gears 1009.

[0043] During coal extraction, the variable frequency motor 1010 drives the second bevel gear 1011 to rotate. Under the meshing connection between the second bevel gear 1011 and the two sets of first bevel gears 1009, the two sets of first bevel gears 1009 are driven to rotate. Since the transmission connection between the two sets of first bevel gears 1009 and the one-way bearing 1008 is the same, only one set of shaftless spiral impellers 1005 rotates to extract coal. When it is necessary to switch the coal combustion, simply control the variable frequency motor 1010 to rotate in the opposite direction, so that the currently used shaftless spiral impeller 1005 stops rotating, and the other set of shaftless spiral impellers 1005 rotates to extract coal, thus improving the efficiency of coal cutting.

[0044] Two sets of raw coal bunkers 2 are respectively loaded with high-calorific-value coal and low-calorific-value coal. When it is necessary to increase the load-carrying capacity of the unit, the corresponding shaftless spiral impeller 1005 in the coal cutting mechanism 10 can be rotated to remove the high-calorific-value coal in the corresponding raw coal bunker 2. When it is necessary to reduce the load-carrying capacity of the unit, the corresponding shaftless spiral impeller 1005 in the coal cutting mechanism 10 can be rotated to transfer the low-calorific-value coal in the adjacent bunker to the conveyor belt 4. The process is simple and quick, improving the efficiency of switching coal types.

[0045] When the coal in the raw coal bunker 2 is consumed to a certain extent, the third cleaning frame 804 is fully exposed. At this time, the rotating shaft 801 can be controlled to drive the third cleaning frame 804 to clean the inner wall of the raw coal bunker 2. When the coal in the raw coal bunker 2 continues to be consumed, the second cleaning frame 803 is fully exposed. When the third cleaning frame 804 rotates, it will drive the second cleaning frame 803 to rotate and clean the inner wall of the raw coal bunker 2 through the magnetic attraction of the first magnet 805 and the second magnet 806. Similarly, when the coal is completely consumed, the first cleaning frame 802 can also clean the inner wall of the raw coal bunker 2. This avoids the existing situation where the raw coal bunker 2 can only be cleaned after the coal is completely consumed, thus improving the cleaning efficiency of the raw coal bunker 2.

[0046] When the coal cutting mechanism 10 is performing coal extraction from the raw coal bunker 2, the observation camera 7 monitors the discharge status of the feeding end of the coal cutting mechanism 10. When the discharge from the feeding end of the coal cutting mechanism 10 is abnormal, the two sets of electric sliding tables 902 can be controlled to move the mounting plate 903 toward the raw coal bunker 2 where the abnormality occurs. Then, the corresponding sets of air cannon vibrators 904 are controlled to fire air cannons at the raw coal bunker 2, causing the raw coal bunker 2 to vibrate and clear the blockage, thus avoiding the problem of easy blockage in the existing raw coal bunker 2.

[0047] When both sets of raw coal bunkers are empty, several sets of hydraulic cylinders 12 can be controlled to drive the corresponding traveling wheels 13 to descend and press against the ground, thus raising the base 1. At this time, the coal cutting device can be moved. After moving to the corresponding position, the base 1 can be pressed against the ground again, avoiding the problem of the existing raw coal bunkers being inconvenient to move. At the same time, during the movement, the horizontal status of the base 1 is monitored by the level sensor 14, and then the corresponding hydraulic cylinder 12 is individually controlled to adjust and keep the base 1 horizontal, preventing the coal cutting device from tipping over when moving on uneven ground. This improves both ease of use and stability.

[0048] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for interconnecting adjacent raw coal bunkers in a coal-fired power plant, comprising a base (1), characterized in that: Two sets of raw coal bunkers (2) are symmetrically arranged at the top two sides of the base (1); A conveyor trough (3) is provided at the top center of the base (1); a conveyor belt (4) is provided in the conveyor trough (3); an observation camera (7) is provided at one side edge of the top of the base (1); and a cleaning mechanism (8) is provided in each set of raw coal bunkers (2). An anti-blocking mechanism (9) is provided between the two sets of raw coal bunkers (2); a coal cutting mechanism (10) is provided below the anti-blocking mechanism (9); the two ends of the coal cutting mechanism (10) respectively penetrate into the corresponding set of raw coal bunkers (2); When it is necessary to increase the load capacity of the unit, the coal cutting mechanism (10) is controlled to transfer the high-calorific-value coal in the corresponding raw coal bunker (2) to the conveyor belt (4). When it is necessary to reduce the load capacity of the unit, the coal cutting mechanism (10) is controlled to transfer the low-calorific-value coal in the adjacent bunker to the conveyor belt (4). The cleaning mechanism (8) includes a rotating shaft (801); a first cleaning frame (802), a second cleaning frame (803), and a third cleaning frame (804) are arranged sequentially from bottom to top on the outer wall of the rotating shaft (801); the two side walls of the first cleaning frame (802), the second cleaning frame (803), and the third cleaning frame (804) are all movable against the inner wall of the raw coal bunker (2); the third cleaning frame (804) is sleeved on the outer wall of the rotating shaft (801); the first cleaning frame (802) and the second cleaning frame (803) are movably sleeved on the outer wall of the rotating shaft (801); The bottom of the third cleaning frame (804) is provided with two sets of first magnets (805); the top and bottom of the second cleaning frame (803) are respectively provided with two sets of second magnets (806); the top of the first cleaning frame (802) is provided with two sets of third magnets (807); the bottom of each set of first magnets (805) is movably abutting against the top of the corresponding two sets of second magnets (806); the top of each set of third magnets (807) is movably abutting against the bottom of the corresponding two sets of second magnets (806); The coal cutting mechanism (10) includes a connecting pipe (1001); two sets of feed pipes (1002) are symmetrically arranged on the two side walls of the connecting pipe (1001); the end of each set of feed pipes (1002) away from the connecting pipe (1001) extends into the corresponding set of raw coal bunkers (2), and a feed chute (1004) is opened on the side wall; the end of each set of feed pipes (1002) close to the connecting pipe (1001) extends into the connecting pipe (1001), and a discharge chute (1007) is opened on the side wall. Each feed pipe (1002) is equipped with a set of shaftless spiral impellers (1005); the bottom of the connecting pipe (1001) is equipped with a discharge pipe (1003); each feed pipe (1002) is equipped with a set of one-way bearings (1008) at one end near the connecting pipe (1001); each set of one-way bearings (1008) is connected to the corresponding set of shaftless spiral impellers (1005) in a transmission connection; Each set of shaftless spiral impellers (1005) is connected to a set of first bevel gears (1009) at the end away from the corresponding set of feed pipes (1002); a motor housing (1006) is provided at the top of the connecting pipe (1001); a variable frequency motor (1010) is provided in the motor housing (1006); the output end of the variable frequency motor (1010) extends into the connecting pipe (1001) and is connected to a second bevel gear (1011); the second bevel gear (1011) is meshed with both sets of first bevel gears (1009).

2. The interconnection device between adjacent raw coal bunkers in a coal-fired power plant according to claim 1, characterized in that: Four sets of extension plates (5) are symmetrically arranged on the two side walls of the base (1); a set of scrapers (6) is provided between each pair of adjacent sets of extension plates (5); each set of scrapers (6) moves against the outer wall of the conveyor belt (4).

3. The interconnection device between adjacent raw coal bunkers in a coal-fired power plant according to claim 1, characterized in that: The base (1) has two sets of telescopic grooves (11) symmetrically opened at the bottom; each set of telescopic grooves (11) has several sets of hydraulic cylinders (12) at the top inner wall edge; each set of hydraulic cylinders (12) has a set of walking wheels (13) connected to the output end; the bottom inner wall of the conveying groove (3) is provided with a level sensor (14).

4. The interconnection device between adjacent raw coal bunkers in a coal-fired power plant according to claim 1, characterized in that: Two sets of U-shaped connecting frames (808) are symmetrically arranged on the inner walls of both sides of the second cleaning frame (803); four sets of movable grooves (810) are symmetrically opened on the inner walls of both sides of the second cleaning frame (803); each set of movable grooves (810) is provided with a set of elastic scrapers (809); one end of two adjacent sets of elastic scrapers (809) moves and abuts together.

5. The interconnection device between adjacent raw coal bunkers in a coal-fired power plant according to claim 1, characterized in that: The anti-blocking mechanism (9) includes an installation pipe (901); the two ends of the installation pipe (901) are respectively connected to the outer wall of a corresponding set of raw coal bunkers (2); two sets of electric slides (902) are symmetrically arranged on the top and bottom inner walls of the installation pipe (901); the output ends of the two sets of electric slides (902) are connected to the installation plate (903); several sets of air cannon vibrators (904) are symmetrically arranged on the two side walls of the installation plate (903).

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