Coarse coal monitoring device for coal washing

Abstract

The utility model discloses a coal is washed and selects with rough running monitoring devices, including the conveying pipe, is equipped with the monitoring hole in the top wall of conveying pipe, is vertically installed in the monitoring hole with square tube, is vertically installed with frame in the top wall of square tube, is installed with the deviation sensor on the crossbeam of frame, is connected with the jib on the push rod of deviation sensor, the end of jib extends into the inner chamber of conveying pipe through the monitoring hole, is installed with the rough intercepting grate in the end of jib, the utility model has the advantages of: through the rough intercepting grate set up in the conveying pipe, make it when intercepting to the coarse coal particle, promote the deviation sensor to send alarm signal, remind staff that the vibration screen has occurred rough running fault and needs to overhaul, thereby realized the real -time monitoring to the rough running accident in the coal washing process, avoided the coarse coal particle to enter into the pipeline and caused the blockage, and the coal washing index and the continuous production operation become more stable.

Description

Technical fields:

[0001] The utility model belongs to the field of coal washing and beneficiation, and in particular relates to a monitoring device for coarse coal washing and beneficiation. Background technology:

[0002] Coal washing is the process of separating gangue and impurities from raw coal using physical or chemical methods. It primarily utilizes the differences in physical properties such as density and electromagnetic properties between coal and impurities for separation. The processes include gravity separation, flotation separation, chemical separation, and microbial separation. Commonly used methods include jigging, heavy media separation, and flotation. The process encompasses raw coal screening, crushing, separation, dewatering, and coal slurry water treatment, effectively removing sulfur and ash and improving coal quality.

[0003] Vibrating screens are commonly used in coal washing to dehydrate coal, primarily removing moisture. However, coarse coal runoff from vibrating screens is a common and unavoidable problem in the industry. This is mainly due to screen plate damage or pre-screen overflow after prolonged use, which is often difficult to detect during continuous operation. This allows coarse coal particles to flow into the under-screen pipes along with the washing wastewater. If not detected promptly, this accumulation can lead to poor feeding or even complete failure of the feeding pump, potentially causing pipe blockage, unstable coal washing production indicators, and other issues. Such incidents are difficult to handle and require lengthy downtime for maintenance, severely impacting the normal operation of the coal washing process. Summary of the Invention:

[0004] The purpose of this utility model is to provide a coal washing and beneficiation coarse runoff monitoring device, which overcomes the shortcomings of the existing technology and effectively solves the existing problem of inconvenient coarse runoff monitoring in the coal washing and beneficiation process.

[0005] The present invention relates to a coal washing coarseness monitoring device, comprising a conveying pipe, a monitoring hole on the top wall of the conveying pipe, a square tube vertically installed on the monitoring hole, a frame vertically installed on the top wall of the square tube, a deviation sensor installed on the crossbeam of the frame, a boom connected to the push rod of the deviation sensor, the end of the boom extending through the monitoring hole into the inner cavity of the conveying pipe, a coarseness cutting grate installed at the end of the boom, and the deviation sensor connected to an alarm.

[0006] Furthermore, the bottom end of the coarse grate has the same shape as the inner wall of the conveying pipe.

[0007] Furthermore, the distance between two adjacent toothed racks of the coarse cutting grate is less than 10 mm, and the distance between the bottom end of each toothed rack of the coarse cutting grate and the bottom wall of the inner cavity of the conveying pipe is less than 10 mm.

[0008] Furthermore, two door cover plates are provided on the top wall of the square tube, and sliding through grooves matching the boom are opened at the inner ends of the two door cover plates.

[0009] Furthermore, the alarm is an audible and visual alarm, and the alarm is installed on the outer wall of the square tube.

[0010] The beneficial effects of this utility model are as follows: by setting a coarse-cutting grate inside the conveying pipe, when it intercepts coarse coal particles, it triggers the deviation sensor to issue an alarm signal, reminding the staff that the vibrating screen has experienced a coarse-cutting fault and needs to be stopped for maintenance. This achieves real-time monitoring of coarse-cutting accidents during the coal washing process, avoids coarse coal particles from entering the pipeline and causing blockages, and makes the coal washing indicators and continuous production operation more stable. Attached image description:

[0011] Figure 1 This is an overall structural view of the present invention;

[0012] Figure 2 This is the left view of the present invention;

[0013] Figure 3 This is a partial cross-sectional view of the rear view of this utility model;

[0014] In the diagram, 1 is the conveying pipe, 2 is the monitoring hole, 3 is the square tube, 4 is the frame, 5 is the deviation sensor, 6 is the push rod, 7 is the boom, 8 is the coarse grate section, 9 is the alarm, 10 is the door cover plate, and 11 is the sliding channel. Detailed implementation method:

[0015] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings:

[0016] like Figures 1 to 3As shown, the coal washing process uses a coarseness monitoring device, including a conveying pipe 1. A monitoring hole 2 is opened on the top wall of the conveying pipe 1. A square tube 3 is vertically installed on the monitoring hole 2. A frame 4 is vertically installed on the top wall of the square tube 3. A deviation sensor 5 is installed on the crossbeam of the frame 4. A boom 7 is connected to the push rod 6 of the deviation sensor 5. The end of the boom 7 extends through the monitoring hole 2 into the inner cavity of the conveying pipe 1. A coarseness cutting grate 8 is installed at the end of the boom 7. The deviation sensor 5 and an alarm 9 are connected. The two are connected; the bottom end of the coarse cutting grate 8 has the same shape as the inner wall of the conveying pipe 1; the distance between two adjacent racks of the coarse cutting grate 8 is less than 10 mm, and the distance between the bottom end of each rack of the coarse cutting grate 8 and the inner wall of the conveying pipe 1 is less than 10 mm; two door cover plates 9 are provided on the top wall of the square tube 3, and a sliding through groove 10 matching the boom 7 is opened at the inner end of each of the two door cover plates 9; the alarm 9 is an audible and visual alarm, and the alarm 9 is installed on the outer wall of the square tube 3.

[0017] Specifically, by setting a coarse-cutting grate 8 inside the conveying pipe 1, when it intercepts large coal particles, it triggers the deviation sensor 5 to issue an alarm signal, thereby reminding the staff that a coarse-cutting fault has occurred.

[0018] In actual use, when the vibrating screen used in the coal washing process is worn and damaged due to long-term use and coarse coal runs, coarse coal particles will enter the conveying pipe 1 along with the coal washing wastewater. At this time, the coarse coal intercepting grate 8 will intercept this part of the coarse coal particles. As the amount of coarse coal intercepted by the coarse coal intercepting grate 8 accumulates, under the impact of the coal washing wastewater, the intercepted coarse coal particles will move along the flow direction of the coal washing wastewater and push the coarse coal intercepting grate 8, along with the boom 7 and push rod 6, to deflect. When the push rod 6 deflects to the set value, it triggers the deviation sensor 5 to send an alarm signal to the alarm 9. When the ground staff receives the alarm signal sent by the alarm 9, they will stop the machine to inspect and repair the coarse coal running problem of the vibrating screen.

[0019] In the above process, the bottom end of the coarse-cutting grate 8 is arc-shaped and has the same shape as the bottom wall of the inner cavity of the conveying pipe 1. The distance between two adjacent racks of the coarse-cutting grate 8 is less than 10 mm, and the distance between the bottom end of each rack and the bottom wall of the inner cavity of the conveying pipe 1 is less than 10 mm, making its interception effect on coarse coal particles better. When the vibrating screen is shut down for maintenance to address the coarse-particle leakage problem, workers can use a long-handled scoop to reach into the monitoring hole 2 and remove the coarse coal particles intercepted by the coarse-cutting grate 8 inside the conveying pipe 1, thereby restoring the initial position of the coarse-cutting grate 8 and allowing the deviation sensor 5 to return to its correct position. The system is under constant monitoring. Two door covers 10 installed on the top wall of the square tube 3 can further prevent large particles of debris from accidentally falling into the conveying pipe 1 through the monitoring hole 2, thus avoiding false alarms and ensuring the normal operation of the coarse coal monitoring device. When cleaning up the intercepted coarse coal particles, the two door covers 10 are opened to facilitate the insertion of a long-handled scoop into the conveying pipe 1 for operation. The sliding groove 11 opened at the inner end of the door cover 10 not only allows the boom 7 to move normally, but also allows the door cover 10 to maximize the area of ​​the top opening of the square tube 3, thereby achieving a better protective effect.

[0020] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A coal washing coke run monitoring device, including a conveying pipe (1), characterized in that: A monitoring hole (2) is provided on the top wall of the conveying pipe (1). A square tube (3) is vertically installed on the monitoring hole (2). A frame (4) is vertically installed on the top wall of the square tube (3). A deviation sensor (5) is installed on the crossbeam of the frame (4). A boom (7) is connected to the push rod (6) of the deviation sensor (5). The end of the boom (7) extends into the inner cavity of the conveying pipe (1) through the monitoring hole (2). A coarse cut grate (8) is installed at the end of the boom (7). The deviation sensor (5) is connected to an alarm (9).

2. The coal washing and coarse coal leakage monitoring device according to claim 1, characterized in that: The bottom end of the coarse grate (8) has the same shape as the inner wall of the conveying pipe (1).

3. The coal washing and coarse coal runoff monitoring device according to claim 2, characterized in that: The distance between two adjacent racks of the coarse cutting grate (8) is less than 10 mm, and the distance between the bottom end of each rack of the coarse cutting grate (8) and the bottom wall of the inner cavity of the conveying pipe (1) is less than 10 mm.

4. The coal washing and coarse coal leakage monitoring device according to claim 1, characterized in that: Two door cover plates (10) are provided on the top wall of the square tube (3), and sliding through grooves (11) matching the boom (7) are opened at the inner ends of the two door cover plates (10).

5. The coal washing and coarse coal runoff monitoring device according to claim 1, characterized in that: The alarm (9) is an audible and visual alarm, and the alarm (9) is installed on the outer wall of the square tube (3).

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