A coal mill material level detection device

Abstract

This invention discloses a coal mill level detection device, including a coal mill and an installation cylinder. An upper sliding groove is formed on the upper side of the coal mill, and an upper sliding plate is slidably connected inside the upper sliding groove. A lower sliding groove is formed on the lower side of the coal mill, and a lower sliding plate is slidably connected inside the lower sliding groove. A fixing magnet is fixedly connected to the lower side of a connecting plate located at the upper end. A positioning groove is formed on one side of the connecting plate. A first ring rail, a second ring rail, a third ring rail, and a fourth ring rail are sequentially fixedly connected from the inside to the top of the inner side of the coal mill. An iron block is rotatably connected inside the fourth ring rail, and the iron block is located directly below the fixing magnet. Plastic sliders are located inside the first, second, and third ring rails, and barometers are installed on the outside of the plastic sliders. This invention allows for quick assembly and disassembly, is easy to carry, and does not require any device to be inserted inside for measurement. It can calculate the specific material level height at various locations and display the numerical value and 3D graphic display, making it more intuitive.

Description

Technical Field

[0001] This invention relates to the field of material level detection technology, and more specifically, to a material level detection device for a coal mill. Background Technology

[0002] A coal mill is a machine that crushes and grinds coal into pulverized coal. It is an important auxiliary equipment for pulverized coal boilers. Types include vertical mills, high-pressure suspension roller mills, medium-speed micro-powder mills, high-pressure trapezoidal mills, and Raymond mills. The coal grinding process involves the crushing of coal and the continuous increase of its surface area. To increase the surface area, the binding forces between solid molecules must be overcome, thus consuming energy. Coal is ground into pulverized coal in a coal mill mainly through three methods: crushing, impact crushing, and grinding. Among these, crushing consumes the least energy, while grinding consumes the most. Various coal mills combine two or three of these methods in the pulverizing process, but the dominant method depends on the type of coal mill. There are many types of coal mills, which can be classified into three types according to the rotational speed of the grinding components: low-speed coal mills, medium-speed coal mills, and high-speed coal mills.

[0003] The purpose of detecting the material level in a coal mill is to maintain the optimal material level in the mill cylinder by adjusting the feeder speed. The material level in the mill cylinder is directly related to the air-coal ratio at the mill outlet. Whether the actual air-coal ratio matches the theoretical air-coal ratio directly affects the accuracy of the mill output adjustment. Therefore, maintaining the optimal coal level is essential for the safe and stable operation of the coal mill and for ensuring accurate adjustment of its output. Material level measurement is a decisive factor in ensuring that the material level in the mill cylinder is always in the optimal state. However, existing dust collector level gauges used to monitor the material level in coal mills are inaccurate. If the dust collector adheres to the wall, the measurement will be inaccurate. Therefore, there is an urgent need to develop a level gauge with a different principle or a portable material level detection device. Thus, a coal mill material level detection device is proposed here to address the above technical problems. Summary of the Invention

[0004] This invention provides a coal mill material level detection device. The device is easy to assemble and disassemble quickly, easy to carry, and can measure the specific material level height of each part without inserting the device into the coal mill. It can also display the numerical value and 3D graphic display, making it more intuitive.

[0005] This invention is achieved through the following technical solution:

[0006] A coal mill level detection device includes a coal mill and an installation cylinder. An upper sliding groove is formed on the upper side of the coal mill, and an upper sliding plate is slidably connected inside the upper sliding groove. A lower sliding groove is formed on the lower side of the coal mill, and a lower sliding plate is slidably connected inside the lower sliding groove. Connecting plates are fixedly connected to the exterior of both the upper and lower sliding plates. A fixing magnet is fixedly connected to the lower side of the upper connecting plate, and the fixing magnet is slidably connected to the coal mill. A positioning groove is formed on one side of the connecting plate. The connecting plate and the installation cylinder are slidably connected. The installation cylinder is externally threaded. The mill is equipped with fixing bolts that pass through positioning slots for positioning. A feed inlet is fixedly connected to the upper side of the mill, and a piston is inserted above the feed inlet. A vent pipe is fixedly connected to the upper side of the piston. The inner top of the mill is sequentially connected to ring rails No. 1, No. 2, No. 3, and No. 4 from the inside out. An iron block is rotatably connected inside ring rail No. 4, and the iron block is located directly below the fixed magnet. Plastic sliders are slidably connected inside ring rails No. 1, No. 2, and No. 3, and a barometer is installed on the outside of the plastic slider.

[0007] The feed inlet extends into the coal mill and has a circular groove on its exterior. The circular groove is located inside the coal mill. A connecting block is rotatably connected inside the circular groove. A pull rod is fixedly connected to the exterior of the connecting block. A connecting rod is fixedly connected to the exterior of the barometer and is fixedly connected to the pull rod. A fixing rod is fixedly connected to the exterior of the iron block and is fixedly connected to the pull rod. The iron block, plastic slider, and barometer all rotate around the feed inlet with the pull rod.

[0008] A display device is fixedly connected to the outside of the mounting cylinder. The display device includes a data receiving module, a numerical calculation module, a 3D graphics simulation module, and a display screen. The data receiving module is connected to the barometer signal, the numerical calculation module is connected to the data receiving module signal, and the 3D graphics simulation module is connected to both the data receiving module and the numerical calculation module signal.

[0009] The number of fixing bolts is four sets, arranged vertically.

[0010] The vent pipe is connected to an external air filling device to fill the inside of the coal mill with air.

[0011] The spacing between the No. 1, No. 2, No. 3 and No. 4 ring rails is equal.

[0012] The lower exterior of the coal mill is fixedly connected to a discharge port.

[0013] The technical solution of the present invention has at least the following beneficial effects:

[0014] 1. The coal mill material level detection device proposed in this invention is easy to assemble and disassemble quickly, easy to carry, and relatively convenient.

[0015] 2. The coal mill level detection device proposed in this invention does not require any device to be inserted inside for measurement, which is more convenient.

[0016] 3. The coal mill material level detection device proposed in this invention can rotate around the coal mill to measure the material level height at the edge of the entire coal mill, and can display the numerical value and 3D graphic display, which is more intuitive and accurate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a coal mill material level detection device proposed in this invention;

[0018] Figure 2 for Figure 1 Enlarged view of A in the middle;

[0019] Figure 3 This is a schematic diagram of the second overall structure of the present invention;

[0020] Figure 4 for Figure 3 Enlarged view of B in the middle;

[0021] Figure 5 for Figure 3 Enlarged view of C;

[0022] Figure 6 This is a schematic diagram of the first partial structure of the present invention;

[0023] Figure 7 for Figure 6 Enlarged view of D;

[0024] Figure 8 This is a schematic diagram of the second partial structure of the present invention;

[0025] Figure 9 for Figure 8 Enlarged view of E in the middle;

[0026] Figure 10 This is a flowchart of the display device.

[0027] In the diagram: 1. Coal mill; 2. Upper chute; 3. Upper slide plate; 4. Lower chute; 5. Lower slide plate; 6. Connecting plate; 7. Positioning groove; 8. Mounting cylinder; 9. Fixing bolt; 10. Feed inlet; 11. Piston; 12. Vent pipe; 13. Ring rail No. 1; 14. Ring rail No. 2; 15. Ring rail No. 3; 16. Ring rail No. 4; 17. Iron block; 18. Plastic slider; 19. Display device; 20. Data receiving module; 21. Numerical calculation module; 22. 3D graphics simulation module; 23. Display screen; 24. Barometer; 25. Circular groove; 26. Connecting block; 27. Pull rod; 28. Connecting rod; 29. ​​Fixing rod; 30. Discharge port; 31. Fixing magnet. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, 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 scope of protection of the present invention.

[0029] Please see Figure 1-10 This invention proposes a coal mill level detection device, comprising a coal mill 1 and an installation cylinder 8. An upper sliding groove 2 is provided on the upper side of the coal mill 1, and an upper sliding plate 3 is slidably connected inside the upper sliding groove 2. A lower sliding groove 4 is provided on the lower side of the coal mill 1, and a lower sliding plate 5 is slidably connected inside the lower sliding groove 4. Connecting plates 6 are fixedly connected to the exterior of both the upper and lower sliding plates 3 and 5. A fixing magnet 31 is fixedly connected to the lower side of the upper connecting plate 6, and the fixing magnet 31 is slidably connected to the coal mill 1. A positioning groove 7 is provided on one side of the connecting plate 6. The connecting plate 6 and the installation cylinder 8 are slidably connected. A fixing bolt 9 is threadedly connected to the exterior of the installation cylinder 8. The fixing bolt 9 passes through the positioning groove 7 for positioning. The upper side of the coal mill 1 is fixedly connected to the feed port 10. The upper side of the feed port 10 is plugged with a piston 11. The upper side of the piston 11 is fixedly connected to the air pipe 12. The inner top of the coal mill 1 is fixedly connected in sequence from the inside to the outside with the first ring rail 13, the second ring rail 14, the third ring rail 15 and the fourth ring rail 16. The inside of the fourth ring rail 16 is rotatably connected with an iron block 17, and the iron block 17 is located directly below the fixed magnet 31. The inside of the first ring rail 13, the second ring rail 14 and the third ring rail 15 are all slidably connected with plastic sliders 18. The outside of the plastic sliders 18 is equipped with a barometer 24.

[0030] Piston 11 blocks the feed inlet 10, while vent pipe 12 is connected to the inflation device. Through prior testing, when the corresponding material level is known, the same amount of air can be filled to correspond to a certain pressure value detected by barometer 24. By obtaining multiple sets of data, the algorithm F(x) can be obtained after calculation by data fitting software and entered into the numerical calculation module 21. In this way, when the same amount of air is filled, the corresponding material level can be deduced from the value displayed by barometer 24.

[0031] A circular groove 25 is provided on the outside of the part of the feed inlet 10 that extends into the coal mill 1. The circular groove 25 is located inside the coal mill 1. A connecting block 26 is rotatably connected inside the circular groove 25. A pull rod 27 is fixedly connected to the outside of the connecting block 26. A connecting rod 28 is fixedly connected to the outside of the barometer 24. The connecting rod 28 is fixedly connected to the pull rod 27. A fixing rod 29 is fixedly connected to the outside of the iron block 17. The fixing rod 29 is fixedly connected to the pull rod 27. The iron block 17, the plastic slider 18, and the barometer 24 all rotate around the feed inlet 10 with the pull rod 27.

[0032] A display device 19 is fixedly connected to the outside of the mounting cylinder 8. The display device 19 includes a data receiving module 20, a numerical calculation module 21, a 3D graphics simulation module 22, and a display screen 23. The data receiving module 20 is connected to the barometer 24, the numerical calculation module 21 is connected to the data receiving module 20, and the 3D graphics simulation module 22 is connected to both the data receiving module 20 and the numerical calculation module 21. The numerical calculation module 21 can calculate the data transmitted from the barometer 24 at each position, and then output the material level at each position through the display device 19. At the same time, the 3D graphics simulation module 22 can intuitively display the material level at each position in the coal mill 1 through 3D graphics.

[0033] The number of fixing bolts 9 is four sets, arranged vertically.

[0034] The vent pipe 12 is connected to an external air-filling device to fill the inside of the coal mill 1 with air.

[0035] The spacing between ring 13, ring 24, ring 315, and ring 416 is equal.

[0036] A discharge port 30 is fixedly connected to the lower exterior of the coal mill 1, which facilitates the output of pulverized coal.

[0037] The working principle of a coal mill material level detection device based on an embodiment is as follows: When using this invention, firstly, remove the fixing bolt 9, pull out a portion of the connecting plate 6, so that the upper sliding plate 3 and the lower sliding plate 5 can be respectively locked in the upper sliding groove 2 and the lower sliding groove 4. Then, remove the fixing bolt 9, and fix the connecting plate 6 to the mounting cylinder 8 through the positioning groove 7. Simultaneously, the two sets of connecting plates 6 are locked in place and cannot be loosened. At the same time, adjust the position of the fixing magnet 31 and the iron block 17 to make them attract each other. Then, insert the piston 11 into the feed inlet 10. Next, connect the ventilation device to the ventilation pipe 12, so that the ventilation pipe 12 fills the inside of the coal mill 1 with an equal amount of air. Then, control the mounting cylinder 8 to make the upper sliding plate 3 slide in the upper sliding groove 2, and the lower sliding plate 5 slide in the lower sliding groove 4. The slide plate 5 slides in the sliding groove 4. The iron block 17 is attracted by the fixed magnet 31 and moves in the fourth ring rail 16. This causes the fixed rod 29 to rotate the connecting rod 28 around the feed inlet 10. This causes the barometers 24 on the first ring rail 13, the second ring rail 14 and the third ring rail 15 to rotate. The air pressure value of each area can be calculated and then transmitted to the data receiving module 20. Based on the data algorithm obtained from the prior test, the material level inside the coal mill 1 can be calculated by the numerical calculation module 21. Furthermore, the material level surface of the coal mill 1 can be simulated by the 3D graphics simulation module 22 and then displayed on the display screen 23 to observe its surface unevenness.

[0038] It is also worth mentioning that even if the air filling inside the coal mill 1 causes the gap between the coal powders to become smaller, resulting in a drop in the material level, the drop can be calculated and supplemented based on prior tests. Moreover, even if the material level drops due to the air pressure, the measured data is the compressed data, and the material level will not rise again because of the decrease in air pressure.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coal mill material level detection device, characterized in that: The device includes a coal mill (1) and an installation cylinder (8). The coal mill (1) has an upper sliding groove (2) on its upper side, with an upper sliding plate (3) slidably connected inside the upper sliding groove (2). The coal mill (1) has a lower sliding groove (4) on its lower side, with a lower sliding plate (5) slidably connected inside the lower sliding groove (4). Both the upper sliding plate (3) and the lower sliding plate (5) are fixedly connected to a connecting plate (6). A fixing magnet (31) is fixedly connected to the lower side of the connecting plate (6) at the upper end, and the fixing magnet (31) is slidably connected to the coal mill (1). A positioning groove (7) is provided on one side of the connecting plate (6). The connecting plate (6) and the installation cylinder (8) are slidably connected. A fixing bolt (9) is threaded onto the outside of the installation cylinder (8). Positioned through the positioning groove (7), the upper side of the coal mill (1) is fixedly connected to the feed inlet (10), the upper side of the feed inlet (10) is plugged with a piston (11), the upper side of the piston (11) is fixedly connected to the air pipe (12), the inner top of the coal mill (1) is fixedly connected in sequence from the inside to the outside with the first ring rail (13), the second ring rail (14), the third ring rail (15) and the fourth ring rail (16), the fourth ring rail (16) is rotatably connected to the inside of the fourth ring rail (16), and the iron block (17) is located directly below the fixed magnet (31). The first ring rail (13), the second ring rail (14) and the third ring rail (15) are all slidably connected to the inside of the plastic slider (18), and the plastic slider (18) is equipped with a barometer (24).

2. The coal mill level detection device according to claim 1, characterized in that: The feed inlet (10) extends into the outside of the coal mill (1) and has a circular groove (25) on the outside. The circular groove (25) is located inside the coal mill (1). A connecting block (26) is rotatably connected inside the circular groove (25). A pull rod (27) is fixedly connected to the outside of the connecting block (26). A connecting rod (28) is fixedly connected to the outside of the barometer (24). The connecting rod (28) is fixedly connected to the pull rod (27). A fixing rod (29) is fixedly connected to the outside of the iron block (17). The fixing rod (29) is fixedly connected to the pull rod (27). The iron block (17), the plastic slider (18), and the barometer (24) all rotate around the feed inlet (10) with the pull rod (27).

3. The coal mill level detection device according to claim 1, characterized in that: The mounting cylinder (8) is externally fixedly connected to a display device (19). The display device (19) includes a data receiving module (20), a numerical calculation module (21), a 3D graphics simulation module (22), and a display screen (23). The data receiving module (20) is connected to the barometer (24) by signal. The numerical calculation module (21) is connected to the data receiving module (20) by signal. The 3D graphics simulation module (22) is connected to the data receiving module (20) and the numerical calculation module (21) by signal.

4. The coal mill level detection device according to claim 1, characterized in that: The number of fixing bolts (9) is four sets, arranged vertically.

5. The coal mill level detection device according to claim 1, characterized in that: The vent pipe (12) is connected to an external air filling device to fill the inside of the coal mill (1).

6. The coal mill level detection device according to claim 1, characterized in that: The spacing between the first ring rail (13), the second ring rail (14), the third ring rail (15), and the fourth ring rail (16) is equal.

7. The coal mill level detection device according to claim 1, characterized in that: The lower outer side of the coal mill (1) is fixedly connected to the discharge port (30).

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