A high-efficiency pulverized coal injection device for blast furnaces

Abstract

The present invention relates to the technical field of blast furnace coal injection devices, and discloses a high-efficiency pulverized coal injection device for a blast furnace, comprising a casing, a feed pipe connected to the lower end of the casing, a plurality of discharge pipes connected to the side of the upper casing, a vibration mechanism provided in the casing for vibrating and cleaning the pulverized coal adhered to the inner wall of the casing, a driving bracket for driving the vibration mechanism rotating in the casing, and a surge mechanism driven by the driving bracket to mix the pulverized coal evenly. The beneficial effects of the present invention compared with the prior art are: the driving bracket drives the surge mechanism to move, driving the airflow to produce a turbulent effect, so that the pulverized coal is distributed more evenly, the movement of the plurality of vibration mechanisms causes the inner wall of the casing to vibrate slightly, thereby avoiding the pulverized coal from adhering to or depositing on the inner wall of the casing, preventing blockage caused by long-term operation, and achieving self-cleaning without manual disassembly of the casing and its components, thereby reducing downtime.

Description

Technical Field

[0001] The invention relates to the technical field of blast furnace coal injection devices, in particular to a high-efficiency blast furnace coal powder injection device. Background Art

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

[0003] The existing high-efficiency pulverized coal injection device for blast furnaces is usually configured as a conical hollow structure, and a plurality of injection branches are connected and arranged on the upper part thereof. When in use, after the high-speed airflow carrying pulverized coal enters, the pressure changes and the motion trajectory changes as well, so that the pulverized coal is evenly distributed and flows out through the plurality of injection branches to achieve the purpose of injection. In this process, due to the reduction in pressure and the bending angle of the device itself, the pulverized coal is easy to adhere and then accumulate. During long-term use, it is easy to cause fluctuations in the amount of pulverized coal and airflow entering the injection branches, affecting the combustion effect of the blast furnace. Usually, it needs to be disassembled for maintenance, which has low maintenance efficiency and affects 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 pulverized coal injection device for a blast furnace.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is: a high-efficiency pulverized coal injection device for a blast furnace, comprising a casing, the casing being a conical hollow structure, the lower end of the casing being connected to a feed pipe, and the upper side of the casing being connected to multiple groups of discharge pipes, the casing being provided with a vibrating mechanism for vibrating and cleaning the coal powder adhered to the inner wall of the casing, the vibrating mechanism comprising a supporting bracket arranged in the casing, the lower end of the supporting bracket being provided with a vibrating box, the vibrating box being a hollow T-shaped structure, a vibrating slide rod being provided for sliding inside the vibrating box, both ends of the vibrating slide rod extending out of the vibrating box, the vibrating box being provided with a limiting sliding column for sliding inside, an active paddle plate for driving the limiting sliding column to intermittently limit the vibrating slide rod for sliding inside the vibrating box, a driving bracket being provided for rotating in the casing to respectively drive the active paddle plate and the vibrating slide rod to slide along the vibrating box, and a surge mechanism driven by the driving bracket to mix the coal powder evenly is provided in the casing.

[0006] As an improvement, the lower end of the limiting slide column is provided with a longitudinal slide rod extending out of the rapping box, the lower end of the longitudinal slide rod is provided with a longitudinal spring, and the lower end of the longitudinal spring is provided with a longitudinal ball head that cooperates with the inner wall of the casing.

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

[0008] As an improvement, the active shift plate is sleeved with a return spring connected to the vibration box, the lower end of the active shift plate is provided with an active support rod, and the active support rod extends into one end of the vibration box and is provided with an active pressure block, the active pressure block is a wedge-shaped structure, and the limiting slide column is provided with a limiting slide groove that slides with the active pressure block, and the cross-section of the limiting slide groove is a wedge-shaped structure.

[0009] As an improvement, the drive bracket includes an advance slide rail and a retreat slide rail that are connected to each other and alternately arranged, a reset magnet is provided on the inner side of the retreat slide rail, an active roller is rotatably provided on the upper end of the active dial plate and is coordinated with the advance slide rail and the retreat slide rail, and a positioning magnet is provided at one end of the positioning slide rod with the same magnetic property as the reset magnet.

[0010] As an improvement, the lower end of the driving bracket is connected to a driving blade, and the driving blade is arranged in the casing near one end of the feed pipe.

[0011] As an improvement, the upper end of the casing is sealed and connected to a mounting cover plate by bolts, and the surge mechanism includes a positioning ball sleeve arranged on the mounting cover plate, a positioning ball head is provided for rolling inside the positioning ball sleeve, a surge plate is provided at the lower end of the positioning ball head, and multiple groups of material passing holes are provided on the surge plate, and both ends of the material passing holes are rounded structures. Both ends of the surge plate are provided with connecting rings for connecting to adjacent surge plates, and a mating magnetic block with the same magnetic property as the reset magnetic block is provided on the inner side of the surge plate.

[0012] Compared with the prior art, the present invention has the following advantages: the driving bracket drives the surge mechanism to move, which drives the airflow to produce turbulent flow effect, making the coal powder more evenly distributed; the movement of multiple groups of vibration mechanisms causes the inner wall of the casing to vibrate slightly, preventing the coal powder from adhering to or depositing on the inner wall of the casing, preventing blockage caused by long-term operation, and achieving self-cleaning without manual disassembly of the casing and various components, thereby reducing downtime. Specifically:

[0013] 1. The vibrating mechanism can drive the vibrating ball head and the longitudinal ball head to move and impact the casing through the unidirectional movement of the active dial plate, thereby generating vibration, thereby cleaning both sides of the conical casing at the same time. It is suitable for conical casings and improves the cleaning effect of the casing;

[0014] 2. The driving blade drives the driving bracket to rotate, and the advance slide rail and the retreat slide rail alternately abut against the active roller. With the cooperation of the reset magnetic block and the positioning magnetic block with the same magnetic properties, the driving and resetting of the rapping ball head and the longitudinal ball head are realized. No external click or other power components are required, which reduces the probability of failure and reduces the cost of repair and maintenance.

[0015] 3. The reset magnetic block drives the multiple groups of surge plates to perform a wave-like motion as the driving bracket rotates, thereby causing the airflow to form a turbulent effect, promoting the distribution of coal powder, and improving the uniformity of coal powder injection in the multiple discharge pipes of the device of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a schematic structural diagram of a high-efficiency pulverized coal injection device for a blast furnace.

[0017] Figure 2 This is an exploded view of a high-efficiency pulverized coal injection device for a blast furnace according to the present invention.

[0018] Figure 3 It is a cross-sectional view of a high-efficiency pulverized coal injection device for a blast furnace according to the present invention.

[0019] Figure 4 The present invention is a schematic structural diagram of the cooperation between a rapping mechanism and a driving bracket of a blast furnace pulverized coal high-efficiency injection device.

[0020] Figure 5 It is an exploded view of the cooperation between a rapping mechanism and a driving bracket of a high-efficiency pulverized coal injection device for a blast furnace according to the present invention.

[0021] Figure 6 It is a cross-sectional view of a vibration mechanism of a high-efficiency pulverized coal injection device for a blast furnace according to the present invention.

[0022] Figure 7 The present invention is a schematic structural diagram of a surge mechanism of a blast furnace pulverized coal high-efficiency injection device.

[0023] Figure 8 It is an exploded view of a surge mechanism of a high-efficiency pulverized coal injection device for a blast furnace according to the present invention.

[0024] As shown in the figure: 1. Casing; 11. Feed pipe; 12. Discharge pipe; 13. Mounting cover; 2. Vibrating mechanism; 21. Support bracket; 211. Vibrating box; 212. Anti-tilt slide; 22. Active dial plate; 221. Active roller; 222. Return spring; 223. Active support rod; 224. Active pressure block; 23. Vibrating slide; 231. Vibrating ball head; 232. Vibrating baffle; 233. Vibrating spring; 234. Positioning slide; 235. Positioning magnet; 24. Longitudinal Slide rod; 241, longitudinal spring; 242, longitudinal ball head; 25, limiting slide column; 251, limiting slide groove; 252, matching slide groove; 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, feed through hole; 35, matching magnet; 36, connecting ring; 4, drive bracket; 41, advance slide rail; 42, retreat slide rail; 43, reset magnet; 44, drive blade. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below with reference to the accompanying drawings.

[0026] Combined with attachment Figure 1 , Attachment Figure 2 , Attachment Figure 3 With attached Figure 4 As shown, a high-efficiency pulverized coal injection device for a blast furnace includes a casing 1, which is a conical hollow structure. A feed pipe 11 is connected to the lower end of the casing 1. The feed pipe 11 is connected to the external pulverized coal supply mechanism through a flange and a bolt seal. A plurality of discharge pipes 12 are connected to the upper side of the casing 1. The discharge pipes 12 are arranged at a 90° angle to the casing 1. A vibration mechanism 2 is provided in the casing 1 for vibrating and cleaning the pulverized coal adhered to the inner wall of the casing 1. The vibration mechanism 2 includes a setting The supporting bracket 21 in the casing 1 is provided with no less than six groups along the circumferential direction of the casing 1. A rapping box 211 is provided at the lower end of the supporting bracket 21. The rapping box 211 is a hollow T-shaped structure. A rapping slide 23 is provided inside the rapping box 211 for sliding. Both ends of the rapping slide 23 extend out of the rapping box 211. A driving bracket 4 for driving the rapping slide 23 is provided in a rotating manner inside the casing 1. A surge mechanism 3 is provided in the casing 1 for mixing the coal powder evenly by driving the driving bracket 4.

[0027] The working principle of the present invention is as follows: the external pulverized coal supply mechanism conveys the pulverized coal into the casing 1 through the feed pipe 11 by the air flow. The casing 1 is a conical hollow structure. Therefore, when the air flow carries the pulverized coal into the upper inner part of the casing 1, the internal space of the casing 1 suddenly increases, thereby causing the pressure to change. The pressure in the central area is higher and the pressure in the surrounding area is relatively lower. The existence of the pressure difference will push the pulverized coal particles to diffuse from the high-pressure area in the center to the low-pressure areas around, 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 to the surrounding areas. When the pulverized coal hits the surface of the casing 1, it will further rebound along the inclined surface inside the casing 1, thereby causing the pulverized coal to scatter in all directions from the center of the casing 1. Furthermore, the driving bracket 4 drives the surge mechanism 3 to move, driving the airflow to produce a turbulent effect, thereby making the pulverized coal more evenly distributed. Afterwards, the pulverized coal flows out through the discharge pipe 12 with the airflow as the power, completing the pulverized coal injection operation.

[0028] During this process, the driving bracket 4 drives multiple groups of vibrating mechanisms 2 to move, and the vibrating mechanisms 2 knock on the inner wall of the casing 1, thereby causing the inner wall of the casing 1 to vibrate slightly, avoiding the adhesion or deposition of coal powder on the inner wall of the casing 1, and preventing the casing 1 from being blocked during long-term operation. Self-cleaning can be achieved without manual disassembly of the casing 1 and its components. Moreover, the vibrating mechanism 2 can produce vibrating effects in two different directions under the drive of the driving bracket 4, thereby improving the cleaning effect of the casing 1. At the same time, the driving bracket 4 does not require external force to drive, which reduces the setting of power components while reducing the probability of failure and reducing the cost of repair and maintenance.

[0029] Combined with attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 With attached Figure 6 As shown, a limiting slide post 25 is slidably provided in the rapping box 211, and a matching slide groove 252 is provided on the limiting slide post 25. The rapping box 211 is provided with a matching bolt 253 that slides with the matching slide groove 252 to prevent the limiting slide post 25 from rotating. An active dial plate 22 that drives the limiting slide post 25 to intermittently limit the rapping slide rod 23 is slidably provided at one end of the rapping box 211. A longitudinal slide rod 24 extending out of the rapping box 211 is provided at the lower end of the limiting slide post 25. A longitudinal spring 241 is provided at the lower end of the longitudinal slide rod 24. A longitudinal ball head 242 that cooperates with the inner wall of the casing 1 is provided at the lower end of the longitudinal spring 241, and a ball sleeve is sleeved on the longitudinal ball head 242.

[0030] One end of the rapping slide 23 is provided with a rapping ball head 231, and a ball sleeve is sleeved on the rapping ball head 231. The other end of the rapping slide 23 is provided with a rapping baffle 232. The cross-section of the rapping baffle 232 is a wedge-shaped structure. The rapping baffle 232 is provided with a positioning slide 234 extending out of the rapping box 211 on the side away from the rapping slide 23. The positioning slide 234 is an L-shaped structure. The support bracket 21 is provided with an anti-tilt slide groove 212 that slides with the positioning slide 234. A rapping spring 233 is sleeved on the positioning slide 234. The upper end of the limiting slide 25 is provided with a top support block 255 that cooperates with the rapping baffle 232. The top support block 255 is a wedge-shaped structure. The lower end of the limiting slide 25 is provided with a matching spring 254 connected to the rapping box 211;

[0031] The active shift plate 22 is sleeved with a return spring 222 connected to the rapping box 211, and the lower end of the active shift plate 22 is provided with an active support rod 223, and the active support rod 223 extends into the rapping box 211. One end is provided with an active pressure block 224, and the active pressure block 224 is a wedge-shaped structure. The limiting slide column 25 is provided with a limiting slide groove 251 that slides with the active pressure block 224, and the cross-section of the limiting slide groove 251 is a wedge-shaped structure.

[0032] The working principle of the rapping mechanism 2: in the initial state, when the active dial plate 22 moves toward the direction close to the limit sliding column 25, the active dial plate 22 drives the active pressure block 224 to move synchronously through the active support rod 223, and the active dial plate 22 squeezes the return spring 222, and the return spring 222 contracts and accumulates force. Under the limiting action of the matching bolt 253, the active pressure block 224 drives the limit sliding column 25 to slide downward through the limiting sliding groove 251 that slides with it, and the limit sliding column 25 squeezes the matching spring 254, and the matching spring 254 contracts and accumulates force, and the supporting block 255 moves downward synchronously to disengage from the rapping baffle 232, releasing the limit on the rapping baffle 232. At this time, under the action of the rapping spring 233, the rapping The spring 233 drives the rapping slide rod 23 and the rapping ball head 231 to move rapidly toward the inner wall of the casing 1 through the rapping baffle 232, thereby striking the inner wall of the casing 1, thereby causing the inner wall of the casing 1 to vibrate slightly, and cleaning the inner wall of the casing 1 through vibration. At the same time, during the downward movement of the limiting slide post 25, the limiting slide post 25 drives the longitudinal ball head 242 to move downward and strike the inner wall of the casing 1 through the cooperation of the longitudinal slide rod 24 and the longitudinal spring 241. Through the unidirectional movement of the active dial plate 22, the rapping ball head 231 and the longitudinal ball head 242 can be driven to move and strike the casing 1 to generate vibration, which is suitable for the casing 1 with a conical structure and improves the cleaning effect of the casing 1;

[0033] After that, the reset spring 222 is reset and drives the active pressure block 224 to reset through the active shift plate 22 and the active support rod 223. The active pressure block 224 releases the limit on the limit slide 25. The limit slide 25 is reset with the cooperation of the matching spring 254. The limit slide 25 drives the longitudinal ball head 242 to reset through the longitudinal slide rod 24 and the longitudinal spring 241. The positioning slide rod 234 drives the rapping baffle 232, the rapping slide rod 23 and the rapping ball head 231 to reset and recover them to the rapping box 211. The rapping baffle 232 squeezes the rapping spring 233, and the rapping spring 233 contracts to store force for the next rapping.

[0034] Combined with attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 With attached Figure 5 As shown, the driving bracket 4 includes an advance slide rail 41 and a retreat slide rail 42 that are interconnected and alternately arranged. The advance slide rail 41 and the retreat slide rail 42 are at different distances from the axis of the driving bracket 4. The connection between the advance slide rail 41 and the retreat slide rail 42 has a smooth transition. A reset magnet 43 is provided on the inner side of the retreat slide rail 42. The upper end of the active dial plate 22 is rotatably provided with an active roller 221 that rotates with the advance slide rail 41 and the retreat slide rail 42. One end of the positioning slide rod 234 is provided with a positioning magnet 235 with the same magnetic property as the reset magnet 43. The lower end of the driving bracket 4 is connected to a driving paddle 44, and the driving paddle 44 is arranged in the casing 1 near one end of the feed pipe 11.

[0035] The working principle of the driving bracket 4 is: under the elastic force of the return spring 222, the active roller 221 maintains the rotation and abutment with the driving bracket 4. Therefore, when the driving blade 44 rotates under the drive of the airflow, the driving blade 44 drives the driving bracket 4 to rotate synchronously. When the advance slide rail 41 abuts against the active roller 221, the advance slide rail 41 pushes the active roller 221 to move right, the active dial plate 22 moves to the right, and the supporting block 255 releases the limit on the rapping baffle 232. The rapping ball head 231 and the longitudinal ball head 242 rap the inner wall of the casing 1. When the retreat slide rail 42 abuts against the active roller 221, the return spring 222 pushes the active dial plate 22 to reset. The reset magnetic block 43 with the same magnetic property drives the positioning magnetic block 235 to move left, and the rapping slide rod 23 moves left and resets, and the supporting block 255 realizes the blocking effect on the rapping baffle 232.

[0036] Combined with attachment Figure 2 , Attachment Figure 3 , Attachment Figure 5 , Attachment Figure 7 With attached Figure 8As shown, the upper end of the casing 1 is sealed and connected to the mounting cover plate 13 by bolts, and the surge mechanism 3 includes a positioning ball sleeve 31 arranged on the mounting cover plate 13, and the positioning ball sleeve 31 is equidistantly arranged in 12 groups along the circumferential direction of the mounting cover plate 13. A positioning ball head 32 is provided in the positioning ball sleeve 31 for rolling, and a surge plate 33 is provided at the lower end of the positioning ball head 32. A plurality of groups of material passing holes 34 are provided on the surge plate 33, and both ends of the material passing holes 34 are rounded structures. Both ends of the surge plate 33 are provided with a connecting ring 36 for connecting to the adjacent surge plate 33, and the inner side of the surge plate 33 is provided with a matching magnetic block 35 with the same magnetic property as the reset magnetic block 43.

[0037] 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 magnetic properties is in the mating position with the mating magnet 35, the reset magnet 43 drives the surge plate 33 to move in the opposite direction through the mating magnet 35, and the surge plate 33 that is not mated with the reset magnet 43 tends to remain stationary. The above two movements are combined with the cooperation of the connecting ring 36, so that multiple groups of surge plates 33 perform a wave-like movement. The high-speed airflow carrying coal powder entering the casing 1 through the feed pipe 11 is decelerated and forms a turbulent effect after passing through the moving surge plate 33, further promoting the distribution of coal powder and avoiding uneven coal powder injection in the multiple discharge pipes 12 of the device of the present invention.

[0038] During the specific implementation of the present invention, the feed pipe 11 is connected to the external pulverized coal supply mechanism by bolts, and the discharge pipe 12 is connected to the blast furnace pulverized coal receiving pipe by bolts to complete the connection operation of the device of the present invention;

[0039] Afterwards, the external coal powder supply mechanism transports the coal powder into the casing 1 through the air flow through the feed pipe 11. When the air flow passes through the driving blade 44, it drives the driving blade 44 to rotate, and the driving blade 44 drives the driving bracket 4 connected thereto to rotate, and the advance slide 41, the retreat slide 42 and the reset magnetic block 43 rotate synchronously. During this process, the advance slide 41 pushes the active dial plate 22 to move to the right through the active roller 221, and the supporting 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, and the air flow carrying the coal powder passes through the moving surge plate 33, forming a turbulent effect, further promoting the mixing of the coal powder, so that the coal powder flows out evenly through the discharge pipe 12, completing the coal powder injection operation.

[0040] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above and, without departing from the purpose of the present invention, designs structures and embodiments similar to the technical solution without creatively designing, they shall fall within the scope of protection of the present invention.

Claims

1. A high-efficiency pulverized coal injection device for a blast furnace, 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 side of the upper part of the casing (1), characterized in that: The casing (1) is provided with a vibration mechanism (2) for vibrating and cleaning the coal powder adhered to the inner wall of the casing (1), the vibration mechanism (2) includes a support bracket (21) arranged in the casing (1), a vibration box (211) is provided at the lower end of the support bracket (21), the vibration box (211) is a hollow T-shaped structure, a vibration slide rod (23) is slidably provided in the vibration box (211), both ends of the vibration slide rod (23) extend out of the vibration box (211), one end of the vibration slide rod (23) is provided with a vibration ball head (231), and the other end of the vibration slide rod (23) is provided with a vibration baffle (232), the cross section of the vibration baffle (232) is a wedge-shaped structure, and a positioning slide rod (234) extending out of the vibration box (211) is provided on the side of the vibration baffle (232) away from the vibration slide rod (23); A limiting 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 limiting 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 housing (1) is provided with a surge mechanism (3) driven by a driving bracket (4) to mix the coal powder evenly. The driving bracket (4) includes an advance slide rail (41) and a retreat slide rail (42) that are connected to each other and alternately arranged, a reset magnet (43) is provided on the inner side of the retreat slide rail (42), an active roller (221) that is rotatably matched with both the advance slide rail (41) and the retreat slide rail (42) is provided on the upper end of the active dial plate (22), and a positioning magnet (235) having the same magnetic properties as the reset magnet (43) is provided at one end of the positioning slide rod (234); The upper end of the housing (1) is sealed and connected to a mounting cover plate (13) through bolts. The surge mechanism (3) includes a positioning ball sleeve (31) arranged on the mounting cover plate (13). A positioning ball head (32) is provided in a rolling manner in the positioning ball sleeve (31). A surge plate (33) is provided at the lower end of the positioning ball head (32). The surge plate (33) is provided with multiple groups of material passing holes (34). Both ends of the material passing holes (34) are rounded structures. Both ends of the surge plate (33) are provided with connecting rings (36) for connecting to adjacent surge plates (33). The inner side of the surge plate (33) is provided with a matching magnetic block (35) with the same magnetic properties as the reset magnetic block (43).

2. The high-efficiency pulverized coal injection device for a blast furnace according to claim 1, characterized in that: The lower end of the limiting 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. The high-efficiency pulverized coal injection device for a blast furnace according to claim 1, characterized in that: A rapping spring (233) is sleeved on the positioning slide bar (234), a top support block (255) cooperating with the rapping baffle (232) is provided at the upper end of the limiting slide column (25), and the top support block (255) is a wedge-shaped structure, and a matching spring (254) connected to the rapping box (211) is provided at the lower end of the limiting slide column (25).

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

5. The high-efficiency pulverized coal injection device for a blast furnace 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 housing (1) near one end of the feed pipe (11).

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