Efficient blast furnace pulverized coal injection device

Abstract

The invention relates to the technical field of blast furnace coal injection devices, and discloses an efficient blast furnace pulverized coal injection device which comprises a machine shell, a feeding pipe is arranged at the lower end of the machine shell in a communicating mode, multiple sets of discharging pipes are arranged on the side face of the upper portion of the machine shell in a communicating mode, and a rapping mechanism for rapping and cleaning pulverized coal attached to the inner wall of the machine shell is arranged in the machine shell. A vibrating mechanism is arranged in the shell, a driving support for driving the vibrating mechanism is rotatably arranged in the shell, and a surge mechanism driven by the driving support to uniformly mix pulverized coal is arranged in the shell. Compared with the prior art, the pulverized coal distributor has the beneficial effects that the driving support drives the surge mechanism to move to drive airflow to generate a turbulence effect, so that the pulverized coal is distributed more uniformly; the multiple sets of rapping mechanisms move to enable the inner wall of the machine shell to generate slight vibration, pulverized coal is prevented from being adhered or deposited on the inner wall of the machine shell, blockage caused by long-time operation is prevented, self-cleaning can be achieved without manually disassembling the machine shell and all parts, and the downtime is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of blast furnace coal injection devices, and specifically refers to a high-efficiency blast furnace pulverized coal injection device. Background Art

[0002] The pulverized coal injection device is used to evenly distribute the pulverized coal from the conveying pipeline into each injection branch pipe, so as to ensure that the pulverized coal can be evenly injected into the blast furnace through multiple spray guns.

[0003] The existing high-efficiency blast furnace pulverized coal injection device is usually set as a conical hollow structure, and multiple groups of injection branch pipes are connected and arranged on its upper part. During use, after the high-speed air flow carrying pulverized coal enters, while the pressure changes, the movement trajectory also changes, so that the pulverized coal is evenly distributed and flows out through multiple groups of injection branch pipes to achieve the purpose of injection. During this process, due to the pressure reduction and the bending angles of the device itself, the pulverized coal is prone to adhesion and accumulation. During long-term use, it is easy to cause fluctuations in the amount of pulverized coal and air flow entering the injection branch pipes, affecting the combustion effect of the blast furnace. Usually, when maintaining it, it needs to be disassembled, resulting in low maintenance efficiency and affecting the use of the blast furnace. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above difficulties and provide a high-efficiency blast furnace pulverized coal injection device.

[0005] To solve the above technical problem, the technical solution provided by the present invention is: a high-efficiency blast furnace pulverized coal injection device, including a casing. The casing is a conical hollow structure. An inlet pipe is connected and arranged at the lower end of the casing, and multiple groups of outlet pipes are connected and arranged on the side of the upper part of the casing. A vibration mechanism for vibrating and cleaning the pulverized coal adhered to the inner wall of the casing is arranged inside the casing. The vibration mechanism includes a support bracket arranged inside the casing. A vibration box is arranged at the lower end of the support bracket. The vibration box is a hollow T-shaped structure. A vibration sliding rod is slidably arranged inside the vibration box. Both ends of the vibration sliding rod extend out of the vibration box. A limiting sliding column is slidably arranged inside the vibration box. An active dial plate for driving the limiting sliding column to intermittently limit the vibration sliding rod is slidably arranged at one end of the vibration box. A driving bracket for respectively driving the active dial plate and the vibration sliding rod to slide along the vibration box is rotatably arranged inside the casing. A surge mechanism for uniformly mixing the pulverized coal driven by the driving bracket is arranged inside the casing.

[0006] As an improvement, a longitudinal sliding rod extending out of the vibration box is arranged at the lower end of the limiting sliding column. A longitudinal spring is arranged at the lower end of the longitudinal sliding rod. A longitudinal ball head cooperating with the inner wall of the casing is arranged at the lower end of the longitudinal spring.

[0007] As an improvement, one end of the vibration and slip rod is provided with a vibration and strike ball head, and the other end of the vibration and slip rod is provided with a vibration and strike baffle. The cross-section of the vibration and strike baffle is a wedge-shaped structure. A positioning slide rod extending out of the vibration box is provided on the side of the vibration and strike baffle away from the vibration and slip rod. A vibration and strike spring is sleeved on the positioning slide rod. A top support block cooperating with the vibration and strike baffle is provided at the upper end of the limit slide column. The top support block is a wedge-shaped structure. A cooperating spring connected to the vibration box is provided at the lower end of the limit slide column.

[0008] As an improvement, a reset spring connected to the vibration box is sleeved on the active dial. An active support rod is provided at the lower end of the active dial. An active pressing block is provided at one end of the active support rod extending into the vibration box. The active pressing block is a wedge-shaped structure. A limit sliding groove slidably cooperating with the active pressing block is provided on the limit slide column. The cross-section of the limit sliding groove is a wedge-shaped structure.

[0009] As an improvement, the drive bracket includes a carry rail and a retreat rail that are connected to each other and arranged alternately. A reset magnet is provided inside the retreat rail. An active roller that is rotationally matched with both the carry rail and the retreat rail is rotatably provided at the upper end of the active dial. A positioning magnet with the same magnetic property as the reset magnet is provided at one end of the positioning slide rod.

[0010] As an improvement, a drive paddle is connected to the lower end of the drive bracket. The drive paddle is arranged at one end of the casing close to the feed pipe.

[0011] As an improvement, the upper end of the casing is hermetically connected with a mounting cover plate by bolts. The surge mechanism includes a positioning ball sleeve arranged on the mounting cover plate. A positioning ball head is rollably arranged inside the positioning ball sleeve. A surge plate is provided at the lower end of the positioning ball head. A plurality of groups of material passing through holes are formed on the surge plate. Both ends of the material passing through holes are rounded structures. Connecting collar rings for connecting with adjacent surge plates are provided at both ends of the surge plate. A cooperating magnet with the same magnetic property as the reset magnet is provided inside the surge plate.

[0012] The beneficial effects of the present invention compared with the prior art are as follows: The drive bracket drives the surge mechanism to move, driving the air flow to produce a turbulent flow effect, making the pulverized coal distribution more uniform. The movement of multiple groups of vibration and strike mechanisms causes slight vibration on the inner wall of the casing, avoiding the adhesion or deposition of pulverized coal on the inner wall of the casing, preventing blockage caused by long-term operation, and realizing self-cleaning without manual disassembly of the casing and its components, reducing the downtime. Specifically: 1. The vibration and strike mechanism can drive both the vibration and strike ball head and the longitudinal ball head to move and strike the casing through the one-way movement of the active dial, thereby generating vibration, so as to clean both sides of the conical casing simultaneously. It is applicable to the conical casing and improves the cleaning effect on the casing. 2. The driving blade drives the driving bracket to rotate. The advancing slide rail and the retracting slide rail alternately rotate and abut against the driving roller. With the cooperation of the reset magnetic block and the positioning magnetic block with the same magnetism, the driving and resetting of the vibration ball head and the longitudinal ball head are realized, eliminating the need to set external clicks or other power components, reducing the probability of failures, and lowering the costs of repair and maintenance. 3. During the rotation of the reset magnetic block with the driving bracket, it drives multiple groups of surge plates to perform a movement similar to wave surging, thereby making the air flow form a turbulent flow effect, promoting the distribution of pulverized coal, and improving the uniformity of pulverized coal injection in multiple discharge pipes of the device of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of a high-efficiency pulverized coal injection device for blast furnaces according to the present invention.

[0014] Figure 2 is an exploded view of a high-efficiency pulverized coal injection device for blast furnaces according to the present invention.

[0015] Figure 3 is a sectional view of a high-efficiency pulverized coal injection device for blast furnaces according to the present invention.

[0016] Figure 4 is a schematic structural diagram of the cooperation between the vibration mechanism and the driving bracket of a high-efficiency pulverized coal injection device for blast furnaces according to the present invention.

[0017] Figure 5 is an exploded view of the cooperation between the vibration mechanism and the driving bracket of a high-efficiency pulverized coal injection device for blast furnaces according to the present invention.

[0018] Figure 6 is a sectional view of the vibration mechanism of a high-efficiency pulverized coal injection device for blast furnaces according to the present invention.

[0019] Figure 7 is a schematic structural diagram of the surge mechanism of a high-efficiency pulverized coal injection device for blast furnaces according to the present invention.

[0020] Figure 8 is an exploded view of the surge mechanism of a high-efficiency pulverized coal injection device for blast furnaces according to the present invention.

[0021] As shown in the figure: 1. Machine shell; 11. Feed pipe; 12. Discharge pipe; 13. Installation cover plate; 2. Vibration mechanism; 21. Support bracket; 211. Vibration box; 212. Anti-tilting chute; 22. Active dial; 221. Active roller; 222. Return spring; 223. Active support rod; 224. Active pressing block; 23. Vibration sliding rod; 231. Vibration ball head; 232. Vibration baffle; 233. Vibration spring; 234. Positioning sliding rod; 235. Positioning magnet; 24. Longitudinal sliding rod; 241. Longitudinal spring; 242. Longitudinal ball head; 25. Limit sliding column; 251. Limit chute; 252. Matching chute; 253. Matching bolt; 254. Matching spring; 255. Top support block; 3. Surge mechanism; 31. Positioning ball sleeve; 32. Positioning ball head; 33. Surge plate; 34. Material passing through hole; 35. Matching magnet; 36. Connecting collar; 4. Driving bracket; 41. Carry-over slide rail; 42. Retraction slide rail; 43. Return magnet; 44. Driving paddle blade. Detailed implementation manner

[0022] The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] Combined with the attached Figure 1 and the attached Figure 2 and the attached Figure 3 and the attached Figure 4 As shown in the figure, a high-efficiency pulverized coal injection device for blast furnaces includes a machine shell 1. The machine shell 1 is a conical hollow structure. The lower end of the machine shell 1 is connected and provided with a feed pipe 11. The feed pipe 11 is hermetically connected and matched with an external pulverized coal supply mechanism through a flange and bolts. The upper side of the machine shell 1 is connected and provided with a plurality of discharge pipes 12. The discharge pipes 12 are arranged at a 90° angle with the machine shell 1. A vibration mechanism 2 for vibrating and cleaning the pulverized coal adhered to the inner wall of the machine shell 1 is arranged in the machine shell 1. The vibration mechanism 2 includes a support bracket 21 arranged in the machine shell 1. The support bracket 21 is arranged in no less than six groups along the circumferential direction of the machine shell 1. The lower end of the support bracket 21 is provided with a vibration box 211. The vibration box 211 is a hollow T-shaped structure. A vibration sliding rod 23 is slidably arranged in the vibration box 211. Both ends of the vibration sliding rod 23 extend out of the vibration box 211. A driving bracket 4 for driving the vibration sliding rod 23 is rotatably arranged in the machine shell 1. A surge mechanism 3 for making the pulverized coal mix evenly driven by the driving bracket 4 is arranged in the machine shell 1.

[0024] Working principle of the present invention: The external pulverized coal supply mechanism transports pulverized coal through the air flow to the inside of the casing 1 via the feed pipe 11. The casing 1 is a conical hollow structure. Therefore, when the air flow carries the pulverized coal into the upper part inside the casing 1, due to the sudden increase in the internal space of the casing 1, the pressure changes. The pressure in the central area is relatively high while the pressure in the surrounding area is relatively low. The existence of the pressure difference will push the pulverized coal particles to diffuse from the central high-pressure area to the surrounding low-pressure areas, thereby promoting the mixing of the pulverized coal inside the casing 1. At the same time, the conical structure guides the pulverized coal to diffuse in all directions. When the pulverized coal impacts the surface of the casing 1, it will further rebound along the inclined plane inside the casing 1, so that the pulverized coal scatters out from the center of the casing 1 in all directions. Further, the driving bracket 4 drives the surge mechanism 3 to move, driving the air flow to produce a turbulent flow effect, so that the distribution of the pulverized coal is more uniform. After that, the pulverized coal flows out through the discharge pipe 12 with the air flow as the power, completing the injection operation of the pulverized coal; During this process, the driving bracket 4 drives a plurality of vibration knocking mechanisms 2 to move. The vibration knocking mechanisms 2 knock on the inner wall of the casing 1, so that the inner wall of the casing 1 generates slight vibrations, avoiding the adhesion or deposition of pulverized coal on the inner wall of the casing 1, preventing the blockage of the casing 1 during long-term operation, and realizing self-cleaning without manual disassembly of the casing 1 and its components. Moreover, the vibration knocking mechanisms 2 can generate vibration knocking effects in two different directions under the drive of the driving bracket 4, improving the cleaning effect on the casing 1. At the same time, the driving bracket 4 does not require external force drive, reducing the setting of power components while reducing the probability of failure and lowering the cost of maintenance and repair.

[0025] Combined with the attached Figure 3 、the attached Figure 4 、the attached Figure 5 and the attached Figure 6 As shown, a limiting sliding column 25 is slidably arranged in the vibration knocking box 211. A matching sliding groove 252 is arranged on the limiting sliding column 25. A matching bolt 253 is arranged on the vibration knocking box 211 and is slidably matched with the matching sliding groove 252 to prevent the limiting sliding column 25 from rotating. One end of the vibration knocking box 211 is slidably provided with a driving limiting sliding column 25 for intermittently limiting the vibration knocking lever 23. The lower end of the limiting sliding column 25 is provided with a longitudinal sliding rod 24 extending out of the vibration knocking box 211. A longitudinal spring 241 is arranged at the lower end of the longitudinal sliding rod 24. A longitudinal ball head 242 cooperating with the inner wall of the casing 1 is arranged at the lower end of the longitudinal spring 241. A ball sleeve is sleeved on the longitudinal ball head 242; One end of the vibration and slip rod 23 is provided with a vibration and hitting ball head 231. A ball sleeve is sleeved on the vibration and hitting ball head 231. The other end of the vibration and slip rod 23 is provided with a vibration and hitting baffle 232. The cross-section of the vibration and hitting baffle 232 is a wedge-shaped structure. A positioning slide rod 234 extending out of the vibration box 211 is provided on the side of the vibration and hitting baffle 232 away from the vibration and slip rod 23. The positioning slide rod 234 is an L-shaped structure. An anti-tilting chute 212 slidably matched with the positioning slide rod 234 is provided on the support bracket 21. A vibration and hitting spring 233 is sleeved on the positioning slide rod 234. The upper end of the limit slide column 25 is provided with a top support block 255 matched with the vibration and hitting baffle 232. The top support block 255 is a wedge-shaped structure. The lower end of the limit slide column 25 is provided with a matching spring 254 connected to the vibration box 211; A reset spring 222 connected to the vibration box 211 is sleeved on the active dial 22. The lower end of the active dial 22 is provided with an active support rod 223. An active pressing block 224 is provided at one end of the active support rod 223 extending into the vibration box 211. The active pressing block 224 is a wedge-shaped structure. A limit chute 251 slidably matched with the active pressing block 224 is provided on the limit slide column 25. The cross-section of the limit chute 251 is a wedge-shaped structure.

[0026] Working principle of the vibration mechanism 2: In the initial state, when the active dial 22 moves towards the limit slide column 25, the active dial 22 drives the active pressing block 224 to move synchronously through the active support rod 223. The active dial 22 squeezes the reset spring 222, and the reset spring 222 contracts and stores energy. Under the limiting action of the cooperation bolt 253, the active pressing block 224 drives the limit slide column 25 to slide downward through the limit chute 251 slidably matched with it. The limit slide column 25 squeezes the matching spring 254, and the matching spring 254 is stressed and contracts to store energy. The top support block 255 moves downward synchronously and thus disengages from the vibration and hitting baffle 232, releasing the limit on the vibration and hitting baffle 232. At this time, under the action of the vibration and hitting spring 233, the vibration and hitting spring 233 drives the vibration and slip rod 23 and the vibration and hitting ball head 231 to move quickly towards the inner wall of the casing 1 synchronously through the vibration and hitting baffle 232, so as to impact the inner wall of the casing 1, and further cause slight vibration of the inner wall of the casing 1. The inner wall of the casing 1 is cleaned by the vibration. At the same time, during the downward movement of the limit slide column 25, the limit slide column 25 drives the longitudinal ball head 242 to move downward through the cooperation of the longitudinal slide rod 24 and the longitudinal spring 241 and impacts the inner wall of the casing 1. Through the one-way movement of the active dial 22, the vibration and hitting ball head 231 and the longitudinal ball head 242 can be driven to move and impact the casing 1 to generate vibration, which is applicable to the conical casing 1 and improves the cleaning effect on the casing 1; After that, the return spring 222 returns to its original position and drives the active pressure block 224 to return to its original position through the cooperation of the active dial 22 and the active support rod 223. The active pressure block 224 releases the limit on the limit sliding column 25, and the limit sliding column 25 returns to its original position under the cooperation of the cooperation spring 254. The limit sliding column 25 drives the longitudinal ball head 242 to return to its original position through the longitudinal sliding rod 24 and the longitudinal spring 241. The positioning sliding rod 234 drives the vibration baffle 232, the vibration sliding rod 23 and the vibration ball head 231 to return to their original positions and retract into the vibration box 211. The vibration baffle 232 squeezes the vibration spring 233, and the vibration spring 233 contracts to store energy for the next vibration.

[0027] Combined with the attached Figure 2 , the attached Figure 3 , the attached Figure 4 and the attached Figure 5 As shown, the drive bracket 4 includes a carry rail 41 and a retreat rail 42 that are connected to each other and arranged alternately. The carry rail 41 and the retreat rail 42 are at different distances from the axis of the drive bracket 4. The connection between the carry rail 41 and the retreat rail 42 has a smooth transition. A return magnet 43 is provided inside the retreat rail 42. An active roller 221 that is rotatably engaged with both the carry rail 41 and the retreat rail 42 is rotatably provided at the upper end of the active dial 22. A positioning magnet 235 with the same magnetism as the return magnet 43 is provided at one end of the positioning sliding rod 234. A drive blade 44 is connected to the lower end of the drive bracket 4, and the drive blade 44 is arranged inside the housing 1 near one end of the feed pipe 11.

[0028] The working principle of the drive bracket 4: Under the elastic force of the return spring 222, the active roller 221 remains in rotational contact with the drive bracket 4. Therefore, when the drive blade 44 rotates driven by the airflow, the drive blade 44 drives the drive bracket 4 to rotate synchronously. When the carry rail 41 abuts against the active roller 221, the carry rail 41 pushes the active roller 221 to move to the right, and the active dial 22 moves to the right, and the top support block 255 releases the limit on the vibration baffle 232, and the vibration ball head 231 and the longitudinal ball head 242 vibrate the inner wall of the housing 1. When the retreat rail 42 abuts against the active roller 221, the return spring 222 pushes the active dial 22 to return to its original position, and the return magnet 43 with the same magnetism drives the positioning magnet 235 to move to the left, and the vibration sliding rod 23 moves to the left to return to its original position, and the top support block 255 realizes the blocking effect on the vibration baffle 232.

[0029] Combined with the attached Figure 2 , the attached Figure 3 , the attached Figure 5 , the attached Figure 7 and the attached Figure 8As shown in the figure, an installation cover plate 13 is hermetically connected to the upper end of the casing 1 by bolts. The surge mechanism 3 includes positioning ball sleeves 31 arranged on the installation cover plate 13. There are 12 groups of positioning ball sleeves 31 arranged equidistantly along the circumferential direction of the installation cover plate 13. A positioning ball head 32 is rotatably arranged in the positioning ball sleeve 31. A surge plate 33 is arranged at the lower end of the positioning ball head 32. A plurality of material passing through holes 34 are formed in the surge plate 33. Both ends of the material passing through holes 34 are rounded structures. Connecting collar rings 36 for connecting with adjacent surge plates 33 are arranged at both ends of the surge plate 33. A matching magnet 35 with the same magnetism as the reset magnet 43 is arranged inside the surge plate 33.

[0030] The working principle of the surge mechanism 3: During the rotation of the driving bracket 4, the reset magnet 43 rotates synchronously. When the reset magnet 43 with the same magnetism and the matching magnet 35 are in the matching position, the reset magnet 43 drives the surge plate 33 to move in the opposite direction through the matching magnet 35, while the surge plate 33 that does not cooperate with the reset magnet 43 has a tendency to remain stationary. The above two movements are combined under the cooperation of the connecting collar ring 36, so that a plurality of surge plates 33 perform a movement similar to wave surging. After the high-speed air flow carrying pulverized coal enters the casing 1 through the feed pipe 11 and decelerates, after passing through the moving surge plate 33, a turbulent flow effect is formed, further promoting the distribution of pulverized coal and avoiding uneven pulverized coal injection in the plurality of discharge pipes 12 of the device of the present invention.

[0031] When the present invention is specifically implemented, the feed pipe 11 is connected to an external pulverized coal supply mechanism by bolts, and the discharge pipe 12 is connected to a blast furnace pulverized coal receiving pipeline by bolts to complete the connection operation of the device of the present invention; After that, the external pulverized coal supply mechanism transports pulverized coal into the casing 1 through the air flow via the feed pipe 11. The air flow drives the driving paddle 44 to rotate when passing through the driving paddle 44. The driving paddle 44 drives the connected driving bracket 4 to rotate. The advancing slide rail 41, the retreating slide rail 42 and the reset magnet 43 rotate synchronously. During this process, the advancing slide rail 41 pushes the active dial 22 to move to the right through the active roller 221, and the top support block 255 releases the limit on the vibration baffle 232. The vibration ball head 231 and the longitudinal ball head 242 vibrate the inner wall of the casing 1. The air flow carrying pulverized coal passes through the moving surge plate 33, forming a turbulent flow effect, further promoting the mixing of pulverized coal, so that the pulverized coal uniformly flows out through the discharge pipe 12 to complete the pulverized coal injection operation.

[0032] The above description of the present invention and its embodiments is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In general, if those of ordinary skill in the art are inspired by it and design, without creative efforts, structural modes and embodiments similar to the technical solution without departing from the gist of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A blast furnace coal powder high efficiency injection device, comprising a casing (1), wherein the casing (1) is a conical hollow structure, a feed pipe (11) is connected to the lower end of the casing (1), and a plurality of discharge pipes (12) are connected to the upper side of the casing (1), characterized in that: The casing (1) is provided with a rapping mechanism (2) for rapping and cleaning coal powder adhered to the inner wall of the casing (1), the rapping mechanism (2) comprising a support bracket (21) arranged in the casing (1), a rapping box (211) being provided at the lower end of the support bracket (21), the rapping box (211) being a hollow T-shaped structure, a rapping slide rod (23) being slidably provided in the rapping box (211), and both ends of the rapping slide rod (23) extending out of the rapping box (211); A limit slide post (25) is slidably provided in the vibration box (211), an active shifting plate (22) is slidably provided at one end of the vibration box (211) for driving the limit slide post (25) to intermittently limit the vibration slide rod (23), and a driving bracket (4) is rotatably provided in the housing (1) for driving the active shifting plate (22) and the vibration slide rod (23) to slide along the vibration box (211); The casing (1) is provided with a surge mechanism (3) driven by a driving bracket (4) to mix the coal powder evenly.

2. A blast furnace coal powder high efficiency injection device according to claim 1, characterized in that: The lower end of the limit slide column (25) is provided with a longitudinal slide rod (24) extending out of the rapping box (211), the lower end of the longitudinal slide rod (24) is provided with a longitudinal spring (241), and the lower end of the longitudinal spring (241) is provided with a longitudinal ball head (242) that cooperates with the inner wall of the casing (1).

3. A blast furnace coal powder high efficiency injection device according to claim 1, characterized in that: A rapping ball head (231) is provided at one end of the rapping slide rod (23), and a rapping baffle (232) is provided at the other end of the rapping slide rod (23). The cross section of the rapping baffle (232) is a wedge-shaped structure. A positioning slide rod (234) extending out of the rapping box (211) is provided on the side of the rapping baffle (232) away from the rapping slide rod (23). A rapping spring (233) is sleeved on the positioning slide rod (234). A top support block (255) cooperating with the rapping baffle (232) is provided at the upper end of the limiting slide column (25). The top support block (255) is a wedge-shaped structure. A matching spring (254) connected to the rapping box (211) is provided at the lower end of the limiting slide column (25).

4. A blast furnace coal powder high efficiency injection device according to claim 1, characterized in that: A return spring (222) connected to the vibration box (211) is sleeved on the active shift plate (22), an active support rod (223) is provided at the lower end of the active shift plate (22), an active pressure block (224) is provided at one end of the active support rod (223) extending into the vibration box (211), the active pressure block (224) is a wedge-shaped structure, and a limiting slide groove (251) slidably matched with the active pressure block (224) is provided on the limiting slide column (25), and the cross section of the limiting slide groove (251) is a wedge-shaped structure.

5. A blast furnace coal powder high efficiency injection device according to claim 3, characterized in that: The driving bracket (4) comprises an advance slide rail (41) and a retreat slide rail (42) which are connected to each other and arranged alternately, a reset magnetic block (43) is arranged on the inner side of the retreat slide rail (42), an active roller (221) which is rotatably arranged on the upper end of the active shift plate (22) and which is rotatably matched with the advance slide rail (41) and the retreat slide rail (42), and a positioning magnetic block (235) having the same magnetic properties as the reset magnetic block (43) is arranged on one end of the positioning slide rod (234).

6. A blast furnace coal powder high efficiency injection device according to claim 1, characterized in that: The lower end of the driving bracket (4) is connected to a driving blade (44), and the driving blade (44) is arranged in the casing (1) near one end of the feed pipe (11).

7. A blast furnace coal powder high efficiency injection device according to claim 5, characterized in that: The upper end of the housing (1) is sealed and connected to a mounting cover plate (13) via bolts. The surge mechanism (3) comprises a positioning ball sleeve (31) arranged on the mounting cover plate (13). A positioning ball head (32) is rotatably arranged in the positioning ball sleeve (31). A surge plate (33) is arranged at the lower end of the positioning ball head (32). The surge plate (33) is provided with a plurality of groups of material passing through holes (34). Both ends of the material passing through holes (34) are rounded structures. Both ends of the surge plate (33) are provided with connecting collars (36) for connecting with adjacent surge plates (33). A matching magnetic block (35) having the same magnetic properties as the reset magnetic block (43) is arranged on the inner side of the surge plate (33).

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