Deslagging monitoring system of coal mill

Abstract

The utility model provides a coal mill deslagging monitoring system, and relates to the technical field of coal mill deslagging, the coal mill deslagging monitoring system comprises an image acquisition assembly, the image acquisition assembly is installed at the top of a pebble coal bucket and located at one side of a feeding port of the pebble coal bucket, the image acquisition assembly comprises a camera used for acquiring images in the pebble coal bucket and an imaging end electrically connected with the camera, and the imaging end is electrically connected with the camera. The camera is located inside the pebble coal hopper, the imaging end is located outside the pebble coal hopper, and the camera can transmit collected image data to the imaging end to be displayed; and the cleaning assembly is arranged on the pebble coal hopper and used for cleaning the camera. The pebble coal hopper has the effect of conveniently checking the condition in the pebble coal hopper.

Description

Technical Field

[0001] This application relates to the technical field of slag discharging of coal mills, and particularly to a slag discharging monitoring system for coal mills. Background Art

[0002] During the coal pulverization process of a coal mill, since there are non-crushable impurities such as iron blocks and ores in raw coal, in order to avoid damaging the coal mill, it is necessary to discharge the non-crushable impurities such as iron blocks and ores. For this reason, a pebble coal hopper for receiving impurities such as iron blocks and ores is connected to the slag discharge port of the coal mill.

[0003] When the coal mill is grinding, the hot air for transporting pulverized coal and drying raw coal enters the coal mill from the hot air inlet, converts the static pressure into dynamic pressure through the nozzle ring outside the grinding table, and blows the ground pulverized coal to the separator at the upper part of the coal mill at a speed of 75 - 90 m / s. At the same time, the drying of the raw coal is completed through a strong stirring movement. The raw coal that is not completely ground is blown back to the grinding table for grinding again. Non-crushable impurities such as iron blocks and ores in the raw coal fall into the hot air chamber at the lower part of the grinding table, and the foreign matters are scraped to the waste outlet by the scraping mechanism fixed on the grinding table support and fall into the pebble coal hopper, and then are discharged from the coal mill.

[0004] Since the capacity of the pebble coal hopper is limited, it is necessary for the operator to regularly check the situation inside the pebble coal hopper. When it is found that the pebble coal hopper is full, the maintenance personnel will be contacted to replace the pebble coal hopper to avoid the abnormal operation of the coal mill caused by the non-discharge of non-crushable impurities in the hot air chamber of the coal mill when the pebble coal hopper is full. When grinding raw coal with a high impurity content, it is often necessary for the operator to frequently go to the pebble coal hopper for inspection, which consumes a lot of manpower in this process. Utility Model Content

[0005] In order to improve the problem that it is impossible to conveniently check the situation inside the pebble coal hopper, this application provides a slag discharging monitoring system for coal mills.

[0006] A slag discharging monitoring system for coal mills provided by this application adopts the following technical solutions:

[0007] A slag discharging monitoring system for coal mills is arranged between the coal mill and the pebble coal hopper, and includes

[0008] An image acquisition component, which is installed on the top of the pebble coal hopper and is located on one side of the feeding port of the pebble coal hopper. The image acquisition component includes a camera for acquiring images inside the pebble coal hopper and an imaging end electrically connected to the camera. The camera is located inside the pebble coal hopper, and the imaging end is located outside the pebble coal hopper. The camera can transmit the acquired image data to the imaging end for display;

[0009] A cleaning component, which is arranged on the pebble coal hopper and is used for cleaning the camera.

[0010] Furthermore, the cleaning assembly includes an air duct and an air compressor. One end of the air duct is connected and inserted into the pebble coal hopper, and the other end is connected to the air compressor. The compressed air generated by the air compressor is drained through the air duct to the camera, which can blow and clean the dust on the camera.

[0011] Furthermore, the camera is installed inside the air duct. The air outlet end of the air duct is connected with a flow guide cylinder. The flow guide cylinder is sleeved outside the camera. The inner wall of the flow guide cylinder at the end far from the air duct is inclined towards the camera, so that the compressed air is drained to the camera through the inner wall of the flow guide cylinder, realizing the blowing and cleaning of the camera.

[0012] Furthermore, the air duct is detachably installed on the pebble coal hopper, and the flow guide cylinder is detachably installed at the end of the air duct.

[0013] Furthermore, the flow guide cylinder is adjustable along the length direction of the air duct.

[0014] Furthermore, a jack for the camera signal line to pass through is opened on the side wall of the air duct. A sealing ring is filled in the air duct in the jack, and the sealing ring is sleeved on the signal line in a sealed manner.

[0015] Furthermore, a slag discharge pipe is connected between the coal mill and the pebble coal hopper. An exhaust hole is opened on the slag discharge pipe, and a filter screen is installed at the exhaust hole on the slag discharge pipe.

[0016] Furthermore, a valve is opened and closed on the slag discharge pipe. The valve is located on the side of the exhaust hole close to the coal mill.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] 1. By adopting the method of blowing and cleaning the camera with compressed air, the camera can clearly collect the images inside the pebble coal hopper and transmit the image data to the imaging end at the far end for display, so that the staff can monitor the picture inside the pebble coal hopper in real time on the remote monitoring console. When it is detected that the pebble coal hopper is full, the pebble coal hopper can be replaced in the first time;

[0019] 2. By monitoring the picture inside the pebble coal hopper in real time, the staff can be guided to adjust the output parameters of the coal mill according to the size and quantity of the pebble coal discharged by the coal mill, making the coal mill operate more safely and economically;

[0020] 3. Blowing the camera with compressed air can cool down the camera and ensure that the camera can clearly monitor the situation inside the pebble coal hopper for a long time;

[0021] 4. The flow guide cylinder is detachably installed at the end of the air guide pipe by means of threaded connection, enabling the staff to remove the flow guide cylinder from the air guide pipe for regular cleaning according to the dust accumulation situation, so as to prevent the dust from adhering to the camera again. Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application.

[0024] Figure 2 It is a schematic diagram of the structures of the air guide pipe, the flow guide cylinder and the camera in the embodiment of the present application.

[0025] Figure 3 It is a schematic diagram of the structures of the flow guide cylinder, the bracket and the camera in the embodiment of the present application.

[0026] Reference Numerals: 1, coal mill; 2, pebble coal hopper; 3, camera; 4, imaging end; 5, air guide pipe; 6, air compressor; 7, flow guide cylinder; 8, jack; 9, sealing ring; 10, slag discharge pipe; 11, exhaust hole; 12, filter screen; 13, valve; 14, signal line; 15, bracket. Detailed Embodiment

[0027] To make the objectives, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention with reference to the drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present invention fall within the scope of protection of the present invention.

[0028] The embodiment of the present application discloses a coal mill slag discharge monitoring system. Refer to Figure 1 、 Figure 2 and Figure 3, A slag discharge monitoring system for a coal mill is arranged between the coal mill 1 and the pebble coal hopper 2, and can monitor the situation inside the pebble coal hopper 2. The monitoring system includes an image acquisition component and a cleaning component installed on the top of the pebble coal hopper 2; a slag discharge pipe 10 is communicatively arranged between the coal mill 1 and the pebble coal hopper 2, so that impurities in the coal mill 1 can smoothly flow into the pebble coal hopper 2 under the guiding action of the slag discharge pipe 10, and a valve 13 is opened and closed on the slag discharge pipe 10. The image acquisition component is located on one side of the feeding port of the pebble coal hopper 2. The image acquisition component includes a camera 3 inside the pebble coal hopper 2 and an imaging end 4 outside the pebble coal hopper 2. The camera 3 is electrically connected to the imaging end 4 through a signal line 14. The camera 3 can transmit the collected image data to the imaging end 4 for display, so that the staff can control the opening and closing of the valve 13 according to the display situation of the imaging end 4, thereby facilitating the staff to clean the pebble coal hopper 2 in a timely manner.

[0029] Considering that when impurities fall into the pebble coal hopper 2, they will be mixed with some dust such as pulverized coal. When the dust adheres to the camera 3, it will affect the image acquisition effect of the camera 3 on the inside of the pebble coal hopper 2. Therefore, referring to Figure 1 , Figure 2 and Figure 3 , the cleaning component can be used to clean the dust on the camera 3. In the embodiment of the present application, the cleaning component includes an air duct 5 and an air compressor 6. The air duct 5 is located on one side of the slag discharge pipe 10, and one end of the air duct 5 is inserted into the pebble coal hopper 2 from the top of the pebble coal hopper 2 and is stably installed on the pebble coal hopper 2 detachably through a flange and screws. The other end of the air duct 5 is communicated with a cavity compressor with a switch; when the switch is turned on, the air compressor 6 is started, and the compressed air generated by the air compressor 6 is led to the camera 3 through the air duct 5, and can blow and clean the dust on the camera 3. Considering that the flow rate of the compressed air is relatively fast, in order to prevent the compressed air from vertically touching the inner bottom wall of the pebble coal hopper 2 and then blowing the dust back into the air duct 5, the air duct 5 is obliquely inserted into the top of the pebble coal hopper 2. At the same time, in order to prevent the pressure inside the pebble coal hopper 2 from increasing when compressed air is introduced, an exhaust hole 11 is opened on the slag discharge pipe 10. The exhaust hole 11 is located on the side of the valve 13 close to the pebble coal hopper 2, and a filter screen 12 is installed on the slag discharge pipe 10 at the exhaust hole 11; when compressed air is introduced into the pebble coal hopper 2 to clean the camera 3, the gas inside the pebble coal hopper 2 can overflow from the exhaust hole 11, and at the same time, the dust will not disperse, ensuring that the camera 3 can be continuously cleaned smoothly.

[0030] Since the impurities carry a large amount of heat when entering the pebble coal hopper 2 from the coal mill 1, which causes the temperature inside the pebble coal hopper 2 to rise. Therefore, referring to Figure 1 , Figure 2 and Figure 3, the camera 3 is installed in the air duct 5 through a cross-shaped bracket 15. The camera 3 is located at the air outlet end of the air duct 5, enabling the camera 3 to stably monitor the situation inside the pebble coal bunker 2. In addition, as the compressed air is discharged from the air outlet end of the air duct 5, the rapidly flowing air can not only carry away the dust adhering to the camera 3, but also cool down the camera 3, ensuring that the camera 3 can clearly monitor the situation inside the pebble coal bunker 2 for a long time. A jack 8 for the signal line 14 of the camera 3 to pass through is provided on the side wall of the air duct 5. A sealing ring 9 is stuffed in the jack 8 of the air duct 5, and the sealing ring 9 is sleeved on the signal line 14. This not only enables one end of the signal line 14 to be stably tensioned and installed in the air duct 5 and not easily swing with the flow of the compressed air, but also the sealing ring 9 can fill the jack 8, preventing the dust inside the pebble coal bunker 2 from overflowing from the jack 8.

[0031] To improve the cleaning efficiency of the compressed air on the dust on the camera 3, referring to Figure 2 and Figure 3 , a flow guide cylinder 7 is connected to the air outlet end of the air duct 5. The flow guide cylinder 7 is sleeved outside the camera 3. One end of the flow guide cylinder 7 is set as a straight cylinder type adapted to be connected to the air duct 5, and the other end is set as a horn cylinder type. The diameter of the upper horn of the flow guide cylinder 7 gradually decreases in the direction away from the air duct 5. One end of the camera 3 away from the air duct 5 extends into the horn cylinder of the flow guide cylinder 7, so that the compressed air is drained to the camera 3 along the inner wall of the flow guide cylinder 7 to realize the purging and cleaning of the camera 3.

[0032] Considering that the dust blown off from the camera 3 may accumulate on the inner wall of the flow guide cylinder 7, referring to Figure 2 , the flow guide cylinder 7 is detachably installed at the end of the air duct 5. When a large amount of dust accumulates on the inner wall of the flow guide cylinder 7, the flow guide cylinder 7 can be removed from the end of the air duct 5 for cleaning. In the embodiment of the present application, the flow guide cylinder 7 is detachably installed at the end of the air duct 5 by means of threaded connection, that is, an external thread is provided on the outer wall of the end of the air duct 5, and an internal thread is provided on the inner wall of the straight cylinder type of the flow guide cylinder 7. The flow guide cylinder 7 is sleeved on the end of the air duct 5, and the flow guide cylinder 7 is rotated so that the flow guide cylinder 7 is threadedly connected to the air duct 5. At the same time, as the flow guide cylinder 7 rotates, the flow guide cylinder 7 can be adjusted in position along the length direction of the air duct 5, thereby adjusting the distance from the inner wall of the horn cylinder of the flow guide cylinder 7 to the camera 3, so that the compressed air can fully purge and clean the dust on the camera 3 under the drainage of the inner wall of the flow guide cylinder 7.

[0033] The implementation principle of the coal mill slag discharge monitoring system of the embodiment of the present application is as follows: first, install the guide tube 7 at the end of the air guide pipe 5 by threaded connection, and rotate the guide tube 7 at the same time to adjust the distance between the end of the guide tube 7 and the camera 3. Then, insert the air guide pipe 5 obliquely into the top of the gravel coal hopper 2, and fix it with flanges and screws, so that the camera 3 and the guide tube 7 are stably installed in the gravel coal hopper 2 and are located on one side of the inlet of the gravel coal hopper 2. Then, connect the air compressor 6 to the other end of the air guide pipe 5. The valve 13 on the slag discharge pipe 10 is opened to allow the impurities in the coal mill 1 to flow smoothly into the gravel coal hopper 2 under the guidance of the slag discharge pipe 10. At the same time, the camera 3 and the air compressor 6 are started. The compressed air generated by the air compressor 6 is guided to the camera 3 through the air guide pipe 5, and is blown toward the camera 3 under the guidance of the inner wall of the guide tube 7. On the one hand, the camera 3 is cooled down, and on the other hand, the dust on the camera 3 is blown away to ensure that the camera 3 can transmit the collected clear image data to the imaging end 4 for display, so that the staff can control the opening and closing of the valve 13 according to the display of the imaging end 4, so as to facilitate the staff to clean the gravel coal hopper 2 in time.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A slag discharge monitoring system for a coal mill, which is arranged between the coal mill and the pebble coal hopper, and is characterized in that, Comprising an image acquisition component, installed on the top of the pebble coal hopper and located on one side of the feeding port of the pebble coal hopper. The image acquisition component includes a camera for acquiring images inside the pebble coal hopper and an imaging end electrically connected to the camera. The camera is located inside the pebble coal hopper, and the imaging end is located outside the pebble coal hopper. The camera can transmit the acquired image data to the imaging end for display; a cleaning component, arranged on the pebble coal hopper and used for cleaning the camera.

2. The slag discharge monitoring system for a coal mill according to claim 1, wherein The cleaning component includes an air duct and an air compressor. One end of the air duct is connected and inserted into the pebble coal hopper, and the other end is connected to the air compressor. The compressed air generated by the air compressor is led to the camera through the air duct, and can blow and clean the dust on the camera.

3. The slag discharge monitoring system of a coal mill according to claim 2, characterized in that, The camera is installed inside the air duct. The air outlet end of the air duct is connected with a diversion cylinder. The diversion cylinder is sleeved outside the camera. The inner wall of the end of the diversion cylinder far away from the air duct is inclined towards the camera direction, so that the compressed air is led to the camera through the inner wall of the diversion cylinder, realizing the blowing and cleaning of the camera.

4. The slag discharge monitoring system for a coal mill according to claim 3, wherein The air duct is detachably installed on the pebble coal hopper, and the diversion cylinder is detachably installed at the end of the air duct.

5. The slag discharge monitoring system of a coal mill according to claim 3, characterized in that The diversion cylinder is adjustable along the length direction of the air duct.

6. The slag discharge monitoring system of a coal mill according to claim 3, wherein A jack for the camera signal line to pass through is opened on the side wall of the air duct, and a sealing ring is filled in the air duct in the jack. The sealing ring is sleeved on the signal line in a sealed manner.

7. A slag discharge monitoring system for a coal mill according to claim 2, characterized in that, A slag discharge pipe is connected between the coal mill and the pebble coal hopper. An exhaust hole is opened on the slag discharge pipe, and a filter screen is installed at the exhaust hole on the slag discharge pipe.

8. The slag discharge monitoring system for a coal mill according to claim 7, characterized in that, A valve is opened and closed on the slag discharge pipe. The valve is located on the side of the exhaust hole close to the coal mill.

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