A pulverized coal flow rate flow regulating device for a coal mill

Abstract

This utility model relates to the field of pulverized coal transportation technology, specifically a pulverized coal flow rate regulating device for a coal mill. It includes a housing, inside which a conveying assembly is installed. The conveying assembly includes a base plate, an insulating cylinder, a metal cylinder, and an electrostatic generator. The insulating cylinder and the metal cylinder are fixedly connected to the housing, with the insulating cylinder located outside the metal cylinder. The electrostatic generator is fixedly connected to the insulating cylinder, and its output end is connected to the metal cylinder. In this utility model, pulverized coal enters the housing through a pipe and then evenly disperses into the metal cylinder through a through-hole at the bottom of the housing. The electrostatic generator is activated, applying static electricity to the metal cylinder. Therefore, when the pulverized coal falls into the metal cylinder through the through-hole, the dispersed pulverized coal is adsorbed by the cylinder wall. When a large amount of adsorbed dust accumulates, it falls directly onto the base plate at the bottom. Ultimately, all the pulverized coal accumulates on the base plate, and the amount of pulverized coal dispersed within the entire metal cylinder is minimal, significantly reducing the risk of dust explosion.

Description

Technical Field

[0001] This utility model relates to the field of pulverized coal transportation technology, specifically a pulverized coal flow rate regulating device for a coal mill. Background Technology

[0002] A coal mill can turn coal lumps into coal powder through impact and grinding, and the coal powder can then be transported through pipelines.

[0003] When transporting pulverized coal through pipelines, dust is generated. When the flow rate of pulverized coal is too high, high-density pulverized coal will flow through the pipeline. High-density pulverized coal poses a risk of dust explosion, thus posing a safety threat to the transportation of pulverized coal. Therefore, a regulating device that can control the flow rate of pulverized coal is needed to solve this problem. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model proposes a coal powder flow rate regulating device for a coal mill, which can effectively reduce the amount of dust generated during the coal powder conveying process, thereby significantly reducing the risk of dust explosion.

[0005] The technical solution to achieve the purpose of this utility model is as follows: a coal mill pulverized coal flow rate regulating device, including a shell, a conveying assembly inside the shell, the conveying assembly including a base plate, an insulating cylinder, a metal cylinder, an electrostatic generator and a discharge pipe, the insulating cylinder and the metal cylinder being fixedly connected to the shell, the insulating cylinder being located outside the metal cylinder, the electrostatic generator being fixedly connected to the insulating cylinder, the output end of the electrostatic generator being connected to the metal cylinder, the discharge pipe being fixedly connected to the base plate, the base plate being fixedly connected to the bottom of the insulating cylinder and the metal cylinder, and a driving assembly being provided inside the insulating cylinder.

[0006] Preferably, the driving component includes a lifting bucket, which is slidably connected to the discharge pipe. A bracket is fixedly connected to the lifting bucket, and the bracket is slidably connected to the discharge pipe. The lifting bucket is funnel-shaped.

[0007] Preferably, the drive assembly further includes a housing, a cylinder, and a lifting frame. The housing is fixedly connected to the outer shell, the cylinder is fixedly connected to the inside of the housing, the lifting frame is fixedly connected to the output shaft of the cylinder, and the lifting frame is fixedly connected to the bracket.

[0008] Preferably, the drive component further includes through holes, which are formed at the bottom of the housing. Multiple through holes are provided and distributed in a ring array.

[0009] Preferably, the drive assembly further includes a dustproof sleeve, which is fixedly connected to the bottom of the housing and located inside the metal sleeve.

[0010] Preferably, the bottom height of the dustproof cylinder is higher than the top height of the discharge pipe, and the through hole is located between the inner wall of the metal cylinder and the outer wall of the dustproof cylinder.

[0011] Compared with the prior art, the significant advantages of this utility model are:

[0012] Firstly, in this invention, the coal powder conveying pipe can be connected to the pipe at the top of the outer shell. The coal powder will enter the outer shell through the pipe and then be evenly dispersed and fall into the metal cylinder through the through hole at the bottom of the outer shell. When the electrostatic generator is turned on, static electricity is applied to the metal cylinder. Therefore, when the coal powder falls into the metal cylinder through the through hole, the dispersed coal powder will be adsorbed by the cylinder wall. When the adsorbed dust accumulates, it will fall directly to the bottom plate. In the end, all the coal powder will accumulate on the bottom plate, and the amount of coal powder floating in the entire metal cylinder will be extremely small, which greatly reduces the risk of dust explosion.

[0013] Secondly, in this invention, when coal powder accumulates on the bottom plate, the cylinder can be activated. The output shaft of the cylinder will drive the lifting frame to move up and down, and also drive the support and lifting bucket to move up and down. When the lifting bucket moves downward, it will insert into the accumulated coal powder, at which point the coal powder will enter the lifting bucket and fill it. Then the lifting bucket will rise until its height is higher than the discharge pipe. At this point, the coal powder in the lifting bucket will fall into the discharge pipe and be discharged from the discharge pipe. The speed at which the coal powder is discharged from the discharge pipe can be adjusted by adjusting the running speed of the cylinder, thereby achieving the effect of adjusting the flow rate of the coal powder conveying. Installing several of these devices on the coal powder conveying line can prevent the generation of excessive dust on the entire conveying line, reducing the risk of dust explosion. Attached Figure Description

[0014] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 This is a cross-sectional view of the internal structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the outer shell and the insulating cylinder in this utility model;

[0018] Figure 4 This utility model Figure 2 The diagram shows an enlarged view of part A.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Outer shell; 2. Conveying assembly; 21. Base plate; 22. Insulating cylinder; 23. Metal cylinder; 24. Static generator; 25. Discharge pipe; 3. Drive assembly; 31. Lifting bucket; 32. Support; 33. Machine housing; 34. Cylinder; 35. Lifting frame; 36. Through hole; 37. Dustproof cylinder. Detailed Implementation

[0021] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0022] This utility model provides an improved coal powder flow rate regulating device for a coal mill. The technical solution of this utility model is as follows:

[0023] like Figures 1-4 As shown, a coal mill pulverized coal flow rate regulating device includes a housing 1. A conveying assembly 2 is installed inside the housing 1. The conveying assembly 2 includes a base plate 21, an insulating cylinder 22, a metal cylinder 23, an electrostatic generator 24, and a discharge pipe 25. The insulating cylinder 22 and the metal cylinder 23 are fixedly connected to the housing 1, with the insulating cylinder 22 located outside the metal cylinder 23. The electrostatic generator 24 is fixedly connected to the insulating cylinder 22, and its output end is connected to the metal cylinder 23. The discharge pipe 25 is fixedly connected to the base plate 21, which is fixedly connected to the bottom of the insulating cylinder 22 and the metal cylinder 23. A driving assembly 3 and the electrostatic generator 24 are installed inside the insulating cylinder 22. Static electricity can be generated and applied to the metal cylinder 23, causing the metal cylinder 23 to become statically charged. The static electricity has an adsorption effect on dust. By connecting the pipe at the top of the outer shell 1 to the coal powder conveying pipe, the coal powder will first enter the outer shell 1 and then fall into the metal cylinder 23. Because there is static electricity on the wall of the metal cylinder 23, the generated dust will be directly adsorbed, thereby reducing the amount of dust escaping, significantly reducing the dust density, and reducing the risk of dust explosion. The height and size of the metal cylinder 23 and the insulating cylinder 22 can be adjusted according to the coal powder conveying volume. That is, the volume of the sealed container formed by the metal cylinder 23 and the bottom plate 21 can be adjusted according to the needs to meet the conveying rate requirements.

[0024] Furthermore, the drive assembly 3 includes a lifting bucket 31, which is slidably connected to the discharge pipe 25. A bracket 32 ​​is fixedly connected to the lifting bucket 31, and the bracket 32 ​​is slidably connected to the discharge pipe 25. The lifting bucket 31 is funnel-shaped. Since the bottom of the lifting bucket 31 is conical, when there is coal powder accumulated on the bottom plate 21, the lifting bucket 31 will insert coal powder during the descent process and collect the coal powder onto the lifting bucket 31. When the lifting bucket 31 rises above the discharge pipe 25, the coal powder will fall into the discharge pipe 25 and then be discharged from the discharge pipe 25.

[0025] Furthermore, the drive assembly 3 also includes a housing 33, a cylinder 34, and a lifting frame 35. The housing 33 is fixedly connected to the outer shell 1, the cylinder 34 is fixedly connected to the inside of the housing 33, the lifting frame 35 is fixedly connected to the output shaft of the cylinder 34, and the lifting frame 35 is fixedly connected to the support 32. The cylinder 34 controls the lifting and lowering of the lifting frame 35, thereby controlling the lifting and lowering of the lifting bucket 31. By adjusting the operating speed of the cylinder 34, the lifting and lowering speed of the lifting bucket 31 can be controlled, thereby adjusting the speed at which coal powder is discharged from the discharge pipe 25, achieving the effect of controlling the flow rate and volume of coal powder. Moreover, the coal powder is discharged from the discharge pipe 25 in batches, not continuously, so it will not generate much dust. Installing several of these devices on the coal powder conveying line can prevent the generation of much dust on the entire conveying line, reducing the risk of dust explosion. The coal powder will be temporarily stored in the metal cylinder 23 and transported in batches through the discharge pipe 25.

[0026] Furthermore, the drive assembly 3 also includes through holes 36, which are located at the bottom of the outer casing 1. Multiple through holes 36 are arranged in a ring array. The coal dust inside the outer casing 1 will be dispersed to each through hole 36 and fall into the metal cylinder 23. Therefore, the dust floating in the metal cylinder 23 is also evenly distributed and will be evenly adsorbed onto the electrostatically charged cylinder wall of the metal cylinder 23. Thus, when the coal dust falls into the interior of the metal cylinder 23, it will not generate much dust. If several of these devices are installed on the conveyor line, the entire conveyor line will not generate much coal dust during the coal dust conveying process.

[0027] Furthermore, the drive assembly 3 also includes a dustproof cylinder 37, which is fixedly connected to the bottom of the housing 1. The dustproof cylinder 37 is located inside the metal cylinder 23. Coal powder falling from the through hole 36 will be separated by the dustproof cylinder 37 to prevent coal powder from directly entering the discharge pipe 25.

[0028] Furthermore, the bottom height of the dustproof cylinder 37 is higher than the top height of the discharge pipe 25. The through hole 36 is located between the inner wall of the metal cylinder 23 and the outer wall of the dustproof cylinder 37. Since the cylinder wall of the metal cylinder 23 is statically charged, it can adsorb the scattered coal dust. Therefore, the bottom height of the dustproof cylinder 37 only needs to be slightly higher than the top height of the discharge pipe 25.

[0029] The specific working method is as follows: First, connect the coal powder conveying pipe to the pipe at the top of the outer shell 1. The coal powder will enter the outer shell 1 through the pipe, and then fall evenly into the metal cylinder 23 through the through hole 36 at the bottom of the outer shell 1. Turn on the electrostatic generator 24 to apply static electricity to the metal cylinder 23. Therefore, when the coal powder falls into the metal cylinder 23 from the through hole 36, the scattered coal powder will be adsorbed by the cylinder wall of the metal cylinder 23. When the adsorbed dust accumulates, it will fall directly onto the bottom plate 21 at the bottom. Finally, all the coal powder will accumulate on the bottom plate 21, and the amount of coal powder scattered in the entire metal cylinder 23 will be extremely small, which greatly reduces the risk of dust explosion.

[0030] Next, the coal powder accumulated on the bottom plate 21 needs to be sent out from the metal cylinder 23. At this time, the cylinder 34 can be activated. The output shaft of the cylinder 34 will drive the lifting frame 35 to move up and down, and drive the support 32 and the lifting bucket 31 to move up and down. When the lifting bucket 31 moves downward, it will insert into the accumulated coal powder. At this time, the coal powder will enter the lifting bucket 31 and fill the lifting bucket 31. Then the lifting bucket 31 rises until the height of the lifting bucket 31 is higher than the discharge pipe 25. At this time, the coal powder in the lifting bucket 31 will fall into the discharge pipe 25 and be discharged from the discharge pipe 25. The speed at which the coal powder is sent out by the discharge pipe 25 can be adjusted by adjusting the running speed of the cylinder 34, thereby achieving the effect of adjusting the coal powder conveying speed and flow rate. Installing several of these devices on the coal powder conveying line can prevent the generation of a lot of dust on the entire conveying line and reduce the risk of dust explosion.

[0031] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of equivalent substitutions of the above technical features. Matters not covered in this utility model are common knowledge to those skilled in the art.

Claims

1. A coal mill pulverized coal flow rate regulating device, characterized in that, include: A housing (1), wherein a conveying assembly (2) is disposed inside the housing (1); The conveying assembly (2) includes a base plate (21), an insulating cylinder (22), a metal cylinder (23), and an electrostatic generator (24). The insulating cylinder (22) and the metal cylinder (23) are fixedly connected to the outer shell (1). The insulating cylinder (22) is located outside the metal cylinder (23). The electrostatic generator (24) is fixedly connected to the insulating cylinder (22). The output end of the electrostatic generator (24) is connected to the metal cylinder (23). The insulating cylinder (22) is equipped with a drive assembly (3).

2. The coal powder flow rate regulating device for a coal mill according to claim 1, characterized in that: The conveying assembly (2) also includes a discharge pipe (25), which is fixedly connected to the base plate (21).

3. The coal powder flow rate regulating device for a coal mill according to claim 1, characterized in that: The base plate (21) is fixedly connected to the bottom of the insulating cylinder (22) and the metal cylinder (23).

4. The coal powder flow rate regulating device for a coal mill according to claim 1, characterized in that: The drive assembly (3) includes a lifting bucket (31), which is slidably connected to the discharge pipe (25). A bracket (32) is fixedly connected to the lifting bucket (31), and the bracket (32) is slidably connected to the discharge pipe (25).

5. The coal powder flow rate regulating device for a coal mill according to claim 4, characterized in that: The lifting bucket (31) is funnel-shaped.

6. The coal powder flow rate regulating device for a coal mill according to claim 2, characterized in that: The drive assembly (3) also includes a housing (33), a cylinder (34) and a lifting frame (35). The housing (33) is fixedly connected to the outer shell (1). The cylinder (34) is fixedly connected to the inside of the housing (33). The lifting frame (35) is fixedly connected to the output shaft of the cylinder (34) and the lifting frame (35) is fixedly connected to the bracket (32).

7. The coal powder flow rate regulating device for a coal mill according to claim 1, characterized in that: The drive assembly (3) also includes a through hole (36) which is located at the bottom of the housing (1).

8. The coal powder flow rate regulating device for a coal mill according to claim 7, characterized in that: Multiple through holes (36) are provided, and the multiple through holes (36) are distributed in a ring array.

9. A coal mill pulverized coal flow rate regulating device according to claim 7, characterized in that: The drive assembly (3) also includes a dustproof cylinder (37), which is fixedly connected to the bottom of the outer shell (1) and is located inside the metal cylinder (23).

10. A coal mill pulverized coal flow rate regulating device according to claim 9, characterized in that: The bottom height of the dustproof cylinder (37) is higher than the top height of the discharge pipe (25), and the through hole (36) is located between the inner wall of the metal cylinder (23) and the outer wall of the dustproof cylinder (37).

Images