Air sweeping and anti-blocking device for raw coal bunker of thermal power plant

Abstract

The present application relates to the technical field of raw coal bunker anti-blocking, particularly to a raw coal bunker gas sweeping anti-blocking device for thermal power plants, which has the technical scheme that: comprising a raw coal bunker, a gas sweeping assembly and a control assembly, the gas sweeping assembly comprises four high-flow pulse valves fixedly connected with the outer walls of the four sides of the bottom of the raw coal bunker, and four fixed pipes fixedly connected with the bottoms of the four high-flow pulse valves respectively, and the control assembly comprises four connecting pipes fixedly connected with the outer walls of one side of the four fixed pipes respectively, a blocking structure for controlling whether the connecting pipes are communicated, and a linkage structure and a driving structure for driving the blocking structure to move. The present application can prevent the raw coal flow from being blocked and the phenomenon of coal flow interruption.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal bunker anti-blocking, and particularly relates to a thermal power plant coal bunker gas-sweeping anti-blocking device. BACKGROUND

[0002] In a thermal power plant, a coal bunker above a coal feeder of a boiler is a raw coal bunker, raw coal stored in the raw coal bunker directly falls into the coal feeder, and then is supplied to a coal mill system for pulverizing, which is an energy source of the boiler of the thermal power plant. The raw coal bunker is basically a conical structure, and a flow area gradually decreases from top to bottom (a flow direction of the coal), a squeezing force becomes larger, and a friction between the coal particles and the bunker wall and between the coal particles also becomes larger. Since a gravity component of the coal flowing along the wall is unchanged, an equivalent flow power in the conical raw coal bunker becomes smaller and smaller with the flow of the coal. Especially in the case of burning coal slime, the coal has a large water content and strong agglomeration, and the flow of the coal in the bunker body is more difficult, and the probability of arching and blocking is greatly increased. Once the raw coal bunker is blocked by the falling coal, the unit has to be forced to reduce the load, or the boiler is unstable in combustion, and a large amount of oil is poured, and in severe cases, the boiler is extinguished, and the unit is non-planned to be shut down, therefore, the problems of anti-blocking and unblocking of the raw coal bunker need to be solved urgently.

[0003] At present, common raw coal bunker anti-blocking and unblocking methods of the thermal power plant include manual unblocking, a bunker wall vibration device (air hammer), and an air cannon. The manual unblocking usually includes poking the coal through a coal poking hole and knocking the blocked coal with a sledgehammer, the method is more labor-consuming, the bunker wall is damaged more, and a large amount of coal slime and raw coal is accumulated on the site when the coal is poked, causing serious environmental pollution. The unblocking principle of the bunker wall vibration device (air hammer) is the same as manual knocking, and the coal adhered to the bunker wall is gradually separated by vibration of the bunker wall to achieve the purpose of unblocking. The above two methods apply external force to the bunker wall, and the vibration force is easy to cause the bunker to crack or deform, and the material in the bunker is likely to be vibrated and compacted, thereby aggravating the flow problem of the coal flow. The working principle of the air cannon is that when the stainless steel impact device is quickly opened, compressed air in a gas storage tank forms a high-speed jet flow under the action of a pressure difference, and the high kinetic energy air directly impacts the blocked part in the bunker to make the coal particles flow under the action of gravity. The air cannon must be at the arching position to play a role, and if the air cannon is above the arching position, the coal will be more compacted. SUMMARY

[0004] In view of the problems in the prior art, the present application is proposed.

[0005] To solve the above technical problems, the present application provides the following technical scheme: a thermal power plant coal bunker gas-sweeping anti-blocking device, comprising,

[0006] a raw coal bunker, an outer wall of the raw coal bunker is provided with a gas-sweeping assembly, the gas-sweeping assembly comprises a high-flow pulse valve connected with a bottom of the raw coal bunker, and a fixed pipe connected with a bottom of the high-flow pulse valve;

[0007] The control assembly is arranged on one side of the fixed pipe, and comprises a connecting pipe connected with the outer wall of the one side of the fixed pipe, a blocking structure for controlling the communication of the connecting pipe, a linkage structure for driving the movement of the blocking structure and a driving structure.

[0008] As a preferred scheme of the coal bunker gas sweeping and anti-blocking device for the thermal power plant, the blocking structure comprises,

[0009] A first piston is slidably connected with the inner wall of the one side of the connecting pipe, a first connecting rod is connected with the top of the first piston, and a linkage rod is rotatably connected with the top of the first connecting rod.

[0010] The linkage rod is rotatably connected with a second connecting rod on the side away from the first connecting rod, and the second connecting rod is connected with the second piston at the bottom.

[0011] The connecting pipe is connected with a flange pipe on the side away from the fixed pipe, the flange pipe and the connecting pipe are in communication with each other, gas pipelines are connected with the flange pipe on both sides, a one-way valve is fixedly installed at the bottom of the flange pipe, and the bottom of the one-way valve is fixedly connected with the top outer wall of the connecting pipe.

[0012] As a preferred scheme of the coal bunker gas sweeping and anti-blocking device for the thermal power plant, the linkage structure comprises,

[0013] A moving rod is connected with the top of the first connecting rod, a roller is rotatably connected with the top of the moving rod on one side, a gear ring is rotatably connected with the bottom of the coal bunker, the roller is arranged on the top outer wall of the gear ring, a sliding rod is connected with the outer wall of the moving rod on one side, and a fixed ring is connected with the bottom of the coal bunker.

[0014] A trapezoidal block is connected with the top outer wall of the gear ring.

[0015] As a preferred scheme of the coal bunker gas sweeping and anti-blocking device for the thermal power plant, the trapezoidal block has three trapezoidal blocks, the three trapezoidal blocks are distributed in a triangular shape, and slopes are arranged on both sides of the trapezoidal block.

[0016] As a preferred scheme of the coal bunker gas sweeping and anti-blocking device for the thermal power plant, the driving structure comprises,

[0017] A servo motor is connected with the bottom of the coal bunker on one side, a first gear is connected with the output end of the servo motor, and the outer wall of the first gear is engaged with the outer wall of the gear ring.

[0018] As a preferred scheme of the coal-fired power plant raw coal bunker gas-sweeping anti-blocking device, one side of the outer wall of the raw coal bunker is provided with an impact assembly for driving the raw coal bunker to vibrate.

[0019] As a preferred scheme of the coal-fired power plant raw coal bunker gas-sweeping anti-blocking device, the impact assembly comprises,

[0020] A second gear meshing with one side of the gear ring, a connecting ring fixedly installed on one side of the outer wall of the raw coal bunker, a third gear fixedly installed on the top of the rotating shaft of the first gear and the second gear,

[0021] A fixed bunker connected to the top of one side of the connecting ring, a first impact rod slidingly connected to the inner wall of the fixed bunker, a second elastic member fixedly installed on the inner wall of one side of the fixed bunker away from the first impact rod, the other side of the second elastic member fixedly connected to the outer wall of one side of the first impact rod, and teeth a provided on one side of the first impact rod and meshing with the corresponding second gear.

[0022] As a preferred scheme of the coal-fired power plant raw coal bunker gas-sweeping anti-blocking device, the second gear is provided with a triangular groove on both sides and is a symmetric figure.

[0023] As a preferred scheme of the coal-fired power plant raw coal bunker gas-sweeping anti-blocking device, the first impact rod is provided with a secondary impact structure.

[0024] As a preferred scheme of the coal-fired power plant raw coal bunker gas-sweeping anti-blocking device, the secondary impact structure comprises,

[0025] A second impact rod slidingly connected to the inner wall of the first impact rod, the second impact rod provided with a spring on both sides, the inner wall of the first impact rod provided with a groove on both sides, and the spring located in the groove.

[0026] A third elastic member connected to one side of the inner wall of the first impact rod, the other side of the third elastic member fixedly connected to one side of the outer wall of the second impact rod, a top rod fixedly installed on one side of the inner wall of the first impact rod away from the second impact rod, and the second impact rod provided with a through hole close to the top rod and having a larger diameter than the top rod.

[0027] The coal flow is prevented from being blocked and interrupted by setting the high-flow pulse valve to spray circular high-pressure gas to push the coal blocks and clean the bunker wall.

[0028] Meanwhile, the second piston can block the three fixed pipes by setting a control assembly, so that the air flows to the same connecting pipe, thereby increasing the internal air pressure of the connecting pipe, and the high-flow pulse valve at the position can spray higher pressure gas to push the coal block pile with high density to move, preventing the coal block pile from blocking the raw coal bunker. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0030] Figure 1 It is a schematic diagram of the overall structure in the present application.

[0031] Figure 2 It is a schematic diagram of the structure of the raw coal bunker after being cut open in the present application.

[0032] Figure 3 It is a schematic diagram of the structure of the plugging structure in the present application.

[0033] Figure 4 It is a schematic diagram of the structure of the plugging structure and the linkage structure in the present application.

[0034] Figure 5 It is a schematic diagram of the connection of the connecting ring, the third gear and the fixed bin in the present application.

[0035] Figure 6 It is a schematic diagram of the structure of the impact assembly in the present application.

[0036] Figure 7 It is a schematic diagram of the structure of the impact assembly in the present application.

[0037] Figure 8 It is a schematic diagram of the structure of the fixed bin after being cut open in the present application.

[0038] Figure 9 It is a schematic diagram of the structure of the secondary impact structure in the present application.

[0039] Figure 10 It is a schematic diagram of the structure of the Figure 9 It is an enlarged view of the A area of the present application. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0041] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details set forth in this description. In other instances, well-known methods, procedures, components, and circuits have not been described in detail so as not to unnecessarily obscure aspects of the present application.

[0042] It should also be noted that, as used in the specification and in the claims, the article "a", "an", or "the" is intended to mean that there is at least one of the particular feature. For example, "an element" shall mean that there is at least one element.

[0043] Embodiment 1

[0044] Reference Figure 1 For the first embodiment of the present application, the embodiment provides a gas sweeping anti-blocking device for raw coal bunker of thermal power plant, which comprises a raw coal bunker 100, and a gas sweeping assembly 200 is arranged on the outer wall of the raw coal bunker 100, and the gas sweeping assembly 200 comprises a high-flow pulse valve 201 connected with the bottom of the raw coal bunker 100, and a fixed pipe 202 is connected with the bottom of the high-flow pulse valve 201, and a threaded pipe is arranged at the bottom of the high-flow pulse valve 201 to be threadedly connected with the top of the fixed pipe 202.

[0045] A control assembly 300 is arranged on one side of the fixed pipe 202, and the control assembly 300 comprises a connecting pipe 301 connected with the outer wall of one side of the fixed pipe 202, the connecting pipe 301 and the fixed pipe 202 are connected with each other through bolts, a plugging structure 400 for controlling the communication of the connecting pipe 301, a linkage structure 500 and a driving structure 600 for driving the plugging structure 400 to move.

[0046] Working principle of the above components: before using the above components, the connecting pipe 301 needs to be connected with a gas pump through a pipe, so that when the raw coal bunker is blocked, the high-pressure air can be delivered into the fixed pipe 202 by starting the gas pump, and then the high-pressure air is sprayed out of the high-flow pulse valve 201, and the strong high-pressure air forms a circular cavity, which generates a destructive impact between the raw coal and the bunker wall to form a circular cleaning surface, so as to solve the problems of wall sticking, arching, mouse hole and the like in the coal bunker, and also to make the raw coal unable to hang on the wall of the bunker, or make the coal blocks adhered to the inner wall of the coal bunker separate from the inclined surface of the wall and return to the original raw coal gravity flow, so as to realize the overall mass flow, thereby preventing the raw coal flow from being blocked and interrupted.

[0047] Embodiment 2

[0048] Reference Figures 2-5For the second embodiment of the application, which is based on the previous embodiment, the difference is that the blocking structure 400 comprises a first piston 401 slidably connected to the inner wall of one side of the connecting pipe 301, a first connecting rod 402 connected to the top of the first piston 401, a bolt provided at the bottom of the first connecting rod 402 for threaded connection with the top of the first piston 401, a linkage rod 403 rotatably connected to the top of the first connecting rod 402, the first connecting rod 402 and the linkage rod 403 being rotatably connected through a bearing, the linkage rod 403 being rotatably connected to the top of the connecting pipe 301, the connecting pipe 301 and the linkage rod 403 being rotatably connected through a bearing, a second piston 405 slidably connected to the side of the connecting pipe 301 away from the first piston 401, a second connecting rod 404 rotatably connected to the side of the linkage rod 403 away from the first connecting rod 402, the second connecting rod 404 being connected to the second piston 405 at the bottom, a flange pipe 406 connected to the side of the connecting pipe 301 away from the fixed pipe 202, the flange pipe 406 and the connecting pipe 301 being in communication with each other, gas conveying pipes 407 connected to both sides of the flange pipe 406, a one-way valve 406a fixedly installed at the bottom of the flange pipe 406, the one-way valve 406a being fixedly connected to the top outer wall of the connecting pipe 301, a linkage structure 500 comprising a moving rod 501 connected to the top of the first connecting rod 402, a roller 502 rotatably connected to the top of the moving rod 501 on one side, a gear ring 505 rotatably connected to the bottom of the raw coal bunker 100, the gear ring 505 being provided with a guide rail at the bottom, a circular fixing ring being provided at the bottom of the bottom of the raw coal bunker 100, the fixing ring being provided with a sliding groove at the top, the guide rail and the sliding groove being slidably connected, the roller 502 being provided on the top outer wall of the gear ring 505, a sliding rod 503 connected to the outer wall of one side of the moving rod 501, a fixing ring 506 connected to the bottom of the raw coal bunker 100, a first elastic member 504 sleeved on the outer wall of the sliding rod 503, the first elastic member 504 being in contact with the bottom of the fixing ring 506, a trapezoidal block 505a connected to the top outer wall of the gear ring 505, three trapezoidal blocks 505a being distributed in a triangular shape, and slopes being provided on both sides of the trapezoidal block 505a;

[0049] Working principle of the above components: the coal in the raw coal bunker is all sieved by the screening machine, and although the size is close, there is still a part of the coal block volume larger than the normal coal block. At this time, therefore, a large amount of small volume coal blocks will be mixed between this part of the coal blocks, which will cause the coal block density of this area to be larger than that of other areas. At this time, it is necessary to increase the air pressure of the airflow in the high-flow pulse valve 201 where the area is located, thereby increasing the gas sweeping effect. At this time, the servo motor 601 is started to drive the first gear 602 to rotate, and the first gear 602 drives the gear ring 505 to rotate. At this time, the three trapezoidal blocks 505a on the gear ring 505 will move to the corresponding roller 502, and after the gear ring 505 rotates for a certain time, the three trapezoidal blocks 505a will lift the three rollers 502. At this time, the three moving rods 501 will press the first elastic member 504 upwards, and the corresponding first connecting rod 402 will also move upwards, which will make the first piston 401 move upwards and the linkage rod 403 tilt. At this time, one side of the linkage rod 403 will push the second connecting rod 404 and the second piston 405 downward, and the second piston 405 will block the connecting pipe 301, thereby preventing the gas from flowing to the fixed pipe 202. At this time, the high-pressure gas will flow through the flange pipe 406 to the gas conveying pipe 407, and then through the gas conveying pipe 407 to the other connecting pipes 301. Here, because there are three connecting pipes 301 blocked, the high-pressure gas will finally flow to the same connecting pipe 301. At this time, the high-pressure gas collected together will push open the one-way valve 406a, thereby increasing the internal gas pressure of the connecting pipe 301 and making the high-flow pulse valve 201 at this position spray higher-pressure airflow to push the coal blocks in this area, thereby solving the above-mentioned problem.

[0050] At the same time, in order to prevent the four high-flow pulse valves 201 from working at the same time and causing the coal blocks at the center position of the raw coal bunker 100 to stick together, the servo motor 601 continuously drives the gear ring 505 to rotate, so that different high-flow pulse valves 201 are cyclically working. In this way, the coal block pile will not be squeezed from multiple aspects at the same time, thereby preventing the middle coal blocks from sticking together.

[0051] The first elastic member 504 is a hot coil spring, which has a large poundage.

[0052] Embodiment 3

[0053] Reference Figures 6-10For the third embodiment of the present application, which is based on the previous embodiment, the difference is that the original coal bunker 100 is provided with an impact assembly 700 on one side of the outer wall for driving the original coal bunker 100 to vibrate, the impact assembly 700 includes a second gear 701 meshing with one side of the gear ring 505, the second gear 701 is symmetrical with the first gear 602, the connecting ring 703 is fixedly installed on one side of the outer wall of the original coal bunker 100, the second gear 701 and the first gear 602 are both fixedly installed with a rotating shaft 702 at the top, the connecting ring 703 is rotatably connected with the top outer wall of the two rotating shafts 702 on both sides, the rotating shaft 702 is connected with a third gear 704 at the top, the fixed bin 705 is connected with one side of the top of the connecting ring 703, the first impact rod 706 is slidably connected with the inner wall of the fixed bin 705, the second elastic element 707 is fixedly installed on the inner wall of the fixed bin 705 away from the first impact rod 706, the other side of the second elastic element 707 is fixedly connected with one side of the outer wall of the first impact rod 706, the first impact rod 706 is provided with a tooth 706a on one side of the outer wall, the tooth 706a is meshed with the corresponding second gear 701, the second gear 701 is provided with a triangular groove on both sides and is a symmetrical figure, the first impact rod 706 is provided with a secondary impact structure 800 on the inner wall, the secondary impact structure 800 includes a second impact rod 801 slidably connected with the inner wall of the first impact rod 706, the second impact rod 801 is provided with a spring 801a on the upper and lower sides, the first impact rod 706 is provided with a groove on the inner wall of the upper and lower sides, the spring 801a is located in the groove, the third elastic element 802 is connected with one side of the inner wall of the first impact rod 706, the other side of the third elastic element 802 is fixedly connected with one side of the outer wall of the second impact rod 801, the first impact rod 706 is fixedly installed with a top rod 803 on one side of the inner wall away from the second impact rod 801, the second impact rod 801 is provided with a through hole with a diameter larger than that of the top rod 803 near the top rod 803, and the through hole is connected with the inner space of the first impact rod 706;

[0054] The working principle of the above components: when the raw coal bin 100 stores large volume of coal blocks, there are a large number of gaps between them, at this time, when the airflow pushes the coal blocks, the airflow will float to other positions from the gaps between the coal blocks, at this time, the pushing force of the airflow will be greatly weakened, therefore, by arranging the second gear 701 and the rotating shaft 702, when the first gear 602 drives the gear ring 505 to rotate, the rotating shaft 702 and the second gear 701 will be rotated, the third gear 704 on the top of the connecting ring 703 will rotate in the same direction, at this time, the third gear 704 will drive the first impact rod 706 to move away from the raw coal bin 100, and press the second elastic member 707, and when the groove of the third gear 704 is turned to the tooth 706a on the first impact rod 706, the second elastic member 707 will push the first impact rod 706 to hit the raw coal bin 100, so that the raw coal bin 100 is vibrated, so that the large volume of coal blocks can be more concentrated, which is beneficial to the movement of the coal blocks pushed by the air, and also helps the coal blocks to move to the outlet of the raw coal bin 100;

[0055] At the same time, in order to increase the knocking frequency, when the first impact rod 706 hits the raw coal bin 100, the second impact rod 801 is forced to enter the first impact rod 706, at this time, the spring piece 801a on the first impact rod 706 will enter the groove of the first impact rod 706, the spring piece 801a is provided with a semicircular protrusion, the protrusion hooks the edge of the groove, and when the third gear 704 drives the first impact rod 706 to move, the top rod 803 will enter the first impact rod 706 through the through hole on the first impact rod 706, and as the first impact rod 706 continues to move, the top rod 803 will squeeze the second impact rod 801, so that the spring piece 801a is retracted, the third elastic member 802 will push the second impact rod 801 to hit the raw coal bin 100, and then the first impact rod 706 hits the raw coal bin 100 again;

[0056] The second elastic member 707 and the third elastic member 802 are both tension springs.

[0057] It is important to note that the construction and arrangement of the application shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review the present disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements or positions can be altered or varied. Thus, the foregoing description is by way of example only, and is not intended to be limiting. The application is limited only as defined in the following claims and equivalents thereto. The sequence of any process or method steps, or the order in which they are carried out, can be altered or re-ordered without departing from the scope of the application. Any "articles of manufacture" or "manufacturing" as described herein are intended to encompass structures constructed of a multitude of different physical elements or components. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and also cover structures yet to be invented which perform the recited function but operate in a different manner. Other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the application as expressed in the appended claims.

[0058] Also, to provide a concise description of the exemplary embodiments, not all features of an actual implementation can be described (that is, not all implementations can include all of the features described or optional implementations can include only a subset of the features described).

[0059] It should be appreciated that in the development of any actual implementation, numerous implementation-specific decisions can be made. These implementation-specific decisions can include specific

[0060] It should be noted that the above-mentioned embodiments are merely used to illustrate the technical solutions of the present application, but not limit the present application, and although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalent replaced without departing from the spirit and scope of the present application, and all should be included in the scope of the claims of the present application.

Claims

1. A gas scavenging and anti-clogging device for raw coal bunkers in thermal power plants, characterized in that: The original coal bunker (100) is provided with a gas sweeping assembly (200) on the outer wall, which comprises a high-flow pulse valve (201) connected with the bottom of the original coal bunker (100), and a fixed pipe (202) connected with the bottom of the high-flow pulse valve (201). A control assembly (300) is arranged on one side of the fixed pipe (202), which comprises a connecting pipeline (301) connected with the outer wall of one side of the fixed pipe (202), a plugging structure (400) for controlling the communication of the connecting pipeline (301), a linkage structure (500) and a driving structure (600) for driving the plugging structure (400) to move. The plugging structure (400) comprises a first piston (401) slidably connected with the inner wall of one side of the connecting pipeline (301), a first connecting rod (402) connected with the top of the first piston (401), and a linkage rod (403) rotatably connected with the top of the first connecting rod (402). The connecting pipeline (301) is rotatably connected with the linkage rod (403), and a second piston (405) is slidably connected with the side of the connecting pipeline (301) away from the first piston (401). A second connecting rod (404) is rotatably connected with the side of the linkage rod (403) away from the first connecting rod (402), and the second connecting rod (404) is connected with the second piston (405) at the bottom. A flange pipe (406) is connected with the side of the connecting pipeline (301) away from the fixed pipe (202), and the flange pipe (406) and the connecting pipeline (301) are in communication with each other. The flange pipe (406) is connected with a gas conveying pipeline (407) on both sides, a one-way valve (406a) is fixedly installed at the bottom of the flange pipe (406), and the bottom of the one-way valve (406a) is fixedly connected with the top outer wall of the connecting pipeline (301). The linkage structure (500) comprises a moving rod (501) connected with the top of the first connecting rod (402), a roller (502) rotatably connected with the top side of the moving rod (501), a gear ring (505) rotatably connected with the bottom of the original coal bunker (100), the roller (502) being arranged on the top outer wall of the gear ring (505), a sliding rod (503) connected with the outer wall of one side of the moving rod (501), and a fixed ring (506) connected with the bottom of the original coal bunker (100). A trapezoidal block (505a) is connected with the top outer wall of the gear ring (505). There are three trapezoidal blocks (505a), which are distributed in a triangular shape, and slopes are arranged on both sides of the trapezoidal blocks (505a). The driving structure (600) comprises a servo motor (601) connected with one side of the bottom of the raw coal bunker (100), a first gear (602) connected with the output end of the servo motor (601), and the outer wall of the first gear (602) is engaged with the outer wall of the gear ring (505).

2. The gas-sweeping anti-blocking device for raw coal bunker of a thermal power plant according to claim 1, characterized in that: The raw coal bunker (100) is provided with an impact assembly (700) on one side of the outer wall of the raw coal bunker (100) for driving the raw coal bunker (100) to vibrate.

3. The gas-sweeping anti-blocking device for raw coal bunker of a thermal power plant according to claim 2, characterized in that: The impact assembly (700) comprises, a second gear (701) engaged with one side of the gear ring (505), a connecting ring (703) fixedly installed on one side of the outer wall of the raw coal bunker (100), a rotating shaft (702) fixedly installed on the top of the second gear (701) and the first gear (602), the inner walls of the two sides of the connecting ring (703) are rotatably connected with the top outer walls of the two rotating shafts (702), and a third gear (704) is connected with the top of the rotating shaft (702). A fixed bin (705) connected with one side of the top of the connecting ring (703), a first impact rod (706) slidably connected with the inner wall of the fixed bin (705), a second elastic member (707) fixedly installed on the inner wall of the side of the fixed bin (705) away from the first impact rod (706), the outer walls of the other sides of the two second elastic members (707) are fixedly connected with the outer walls of the one sides of the two first impact rods (706), the one sides of the two first impact rods (706) are provided with teeth (706a), and the teeth (706a) are engaged with the corresponding third gears (704).

4. The gas-sweeping anti-blocking device for raw coal bunker of a thermal power plant according to claim 3, characterized in that: The third gears (704) are provided with triangular grooves on the two sides thereof and are symmetrical patterns.

5. The gas-sweeping anti-blocking device for raw coal bunker of a thermal power plant according to claim 4, characterized in that: The inner wall of the first impact rod (706) is provided with a secondary impact structure (800).

6. The gas-sweeping anti-blocking device for raw coal bunker of a thermal power plant according to claim 5, characterized in that: The secondary impact structure (800) comprises, a second impact rod (801) slidably connected with the inner wall of the first impact rod (706), a spring piece (801a) provided on the upper and lower sides of the second impact rod (801), grooves provided on the upper and lower sides of the inner wall of the first impact rod (706), and the spring piece (801a) is located in the groove; a third elastic member (802) connected with the inner wall of the one side of the first impact rod (706), the outer wall of the other side of the third elastic member (802) is fixedly connected with the outer wall of the one side of the second impact rod (801), a top rod (803) fixedly installed on the inner wall of the one side of the first impact rod (706) away from the second impact rod (801), and a through hole with a diameter larger than that of the top rod (803) is formed in the second impact rod (801) close to the top rod (803).

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