Pulverized coal recovery device of belt conveyor

Abstract

The utility model relates to a pulverized coal recovery device, in particular to a pulverized coal recovery device used on an underground coal mine belt conveyor, which comprises a coal suction cover, a coal dust ventilation pipeline, a sealing quick connector and a coal cleaning device. The coal suction cover and the coal dust ventilation pipeline are installed on the two sides of a rack of the belt conveyor, and the coal suction cover is connected with an air valve on the coal dust ventilation pipeline to form a closed loop. Air enters the inner side of the coal suction cover, and the inner side of the air suction cover is arc-shaped. The coal cleaning device comprises a sealing quick connector, a shear type coal dust diffuser, an inclined filter cover, a filter bag, an exhaust inlet, an upper cover plate, a fan, a movable scraper blade, a grating, a coal cleaning chamber, a coal collecting chamber and a lower cover plate. The fan is installed on the outer side of the coal cleaning device, and an air opening of the fan is connected with an air outlet of the device through a pipeline. When the device is started, the amount of coal dust in a roadway of the belt conveyor can be effectively reduced, the recovery rate of the coal dust is improved, and resource waste is reduced.

Description

Technical Field

[0001] This utility model relates to a coal powder recovery device, and more particularly to a coal powder recovery device for a belt conveyor in a coal mine. Background Technology

[0002] Modern underground coal mining has achieved mechanization and automation. Mechanized coal mining utilizes numerous belt conveyors to transport raw coal from underground to the surface. During transport, the belt conveyors have an inclination angle and uneven surfaces. When the raw coal is subjected to mechanical vibration or wind, coal dust begins to disperse, resulting in a large amount of scattered coal dust along the sides of the conveyor. This scattered coal dust accumulates over time, not only wasting resources but also causing significant environmental pollution. Therefore, it is necessary to recover the coal dust from the belt conveyor. Traditional coal dust recovery is done manually, which is labor-intensive and does not fundamentally solve the problem of coal dust escaping from the belt conveyor. Summary of the Invention

[0003] The purpose of this invention is to provide a coal powder recovery device for a belt conveyor to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] To achieve the above objectives and address the current situation where coal dust cleaning relies solely on manual labor, which is labor-intensive and ineffective in addressing the root cause of coal dust pollution, a coal dust recovery device for a belt conveyor has been developed. This device includes a coal suction hood, a coal dust ventilation duct, a sealed quick-connect fitting, and a coal cleaning device. The coal suction hood and coal dust ventilation duct are installed on both sides of the belt conveyor frame. The coal suction hood is connected to the air valve on the coal dust ventilation duct, forming a closed loop. Air enters from the inside of the coal suction hood, which has an arc-shaped inner side. The coal cleaning device includes a sealed quick-connect fitting, a shear-type coal dust diffuser, an inclined filter hood and filter bag, an air intake, an upper cover plate, a fan, a movable scraper, a grid, a coal cleaning chamber, a coal collection chamber, and a lower cover plate. The fan is installed on the outside of the coal cleaning device, and the fan's air outlet is connected to the device's air outlet via a pipe.

[0006] The coal cleaning device is equipped with an inclined filter cover, and a filter bag is installed at the rear end of the filter cover. The filter cover and the filter bag are fixedly connected to the flange clamp. The coal collecting device is equipped with upper and lower end covers. The upper end cover is equipped with an air inlet. The upper end cover and the surrounding device are equipped with sealing grooves. The flange clamp is installed on the sealing groove.

[0007] The further coal cleaning device is equipped with a shear-type coal dust diffuser, which is connected to a high-speed rotating wind-powered cutter.

[0008] Further movable scrapers are installed inside the coal cleaning device, equipped with retractable dustproof cylinders, and the tips of the scrapers are equipped with rotatable brushes that make soft contact with the lower grid.

[0009] Beneficial effects

[0010] The use of this device not only reduces coal dust falling into the roadway during coal conveying, thus improving roadway cleanliness and replacing the need for manual cleaning, but also significantly reduces the amount of coal dust in the mine roadway, thereby minimizing its impact on safe production. Furthermore, the collected coal dust is centrally processed, reducing resource waste. Attached Figure Description

[0011] Figure 1 This is a structural diagram of a belt conveyor coal powder recovery device;

[0012] Figure 2 Here is a structural diagram of the movable scraper;

[0013] Figure 3 This is a structural diagram of a shear-type coal dust diffuser;

[0014] 1. Coal suction hood; 2. Coal dust ventilation duct; 3. Sealed quick-connect fitting; 4. Shear-type coal dust diffuser; 5. Inclined filter cover and filter bag; 6. Air intake; 7. Upper cover plate; 8. Fan; 9. Movable scraper; 10. Grille; 11. Coal cleaning chamber; 12. Coal collection chamber; 13. Lower cover plate; 91. Scraper head; 92. Telescopic dustproof cylinder; 93. Brush; 41. High-speed rotating wind-powered cutter. Detailed Implementation

[0015] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0016] like Figures 1-3 As shown, a coal dust recovery device for a belt conveyor includes a coal suction hood 1, a coal dust ventilation duct 2, a sealed quick-connect joint 3, and a coal cleaning device. The coal suction hood 1 and the coal dust ventilation duct 2 are installed on both sides of the belt conveyor frame. The coal suction hood 1 is connected to the air valve on the coal dust ventilation duct 2 to form a closed loop. Air enters from the inside of the coal suction hood 1, and the inside of the coal suction hood 1 is arc-shaped. The coal cleaning device includes a sealed quick-connect joint 3, a shear-type coal dust diffuser 4, an inclined filter cover and filter bag 5, an air intake 6, an upper cover plate 7, a fan 8, a movable scraper 9, a grid 10, a coal cleaning chamber 11, a coal collection chamber 12, and a lower cover plate 13. The fan 8 is installed on the outside of the coal cleaning device, and the air outlet of the fan 8 is connected to the air outlet of the device by a pipe.

[0017] The coal cleaning device is further equipped with an inclined filter cover 5, and a filter air bag 5 is installed at the rear end of the filter cover. The filter cover and the filter air bag 5 are fixedly connected to the flange clamp. The coal collecting device is equipped with an upper cover plate 7 and a lower cover plate 13. An air inlet is provided on the upper cover 7. The upper cover 7 and the surrounding devices are provided with sealing grooves. The flange clamp is installed on the sealing groove.

[0018] The further coal cleaning device is equipped with a shear-type coal dust diffuser 4, which is connected to a high-speed wind-powered rotating cutter 41.

[0019] The further movable scraper is provided with a retractable dustproof cylinder 92 inside the coal cleaning device, and the scraper head 91 is provided with a rotatable brush 93, which makes soft contact with the lower grid 10.

[0020] When the equipment is operating normally, it starts up together with the belt conveyor. After startup, the internal fan 8 starts working, and the airflow begins to flow along the coal dust ventilation duct 2. Due to the negative pressure, the coal suction hood 1 begins to suck in the coal dust above the belt conveyor. The negative pressure ensures that all the coal dust on the belt conveyor can smoothly enter the coal suction hood 1, preventing it from entering other spaces. The airflow carrying coal dust will continue along the coal dust ventilation duct 2 to the inside of the coal cleaning device. When the airflow carrying coal dust reaches the inside of the coal cleaning device, the inclined filter hood and filter bag 5 installed inside the device prevent the coal dust from passing through due to its large particle diameter, while the airflow can pass through. Therefore, the coal dust is trapped on the filter hood, and the filter bag performs a second filtration function. As the operating time increases, more and more coal dust accumulates on the filter cover and filter bag. The coal dust will fall into the plane of the grid 10 of the coal collection device. The floor plane of the coal collection device is equipped with a movable scraper 9. The movable scraper 9 is set to a fixed frequency to continuously collect the falling coal dust into the coal cleaning chamber 11. After the coal cleaning chamber 11 reaches a certain level, the accumulated coal dust can be removed.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0022] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A coal dust recovery device for a belt conveyor, comprising a coal suction hood, a coal dust ventilation duct, a sealed quick-connect joint, and a coal cleaning device, characterized in that: The coal suction hood and coal dust ventilation duct are installed on both sides of the belt conveyor frame. The coal suction hood is connected to the air valve on the coal dust ventilation duct to form a closed loop. Air enters from the inside of the coal suction hood, and the inside of the suction hood is arc-shaped. The coal cleaning device includes a sealed quick-connect joint, a shear-type coal dust diffuser, an inclined filter cover and filter bag, an air inlet, an upper cover plate, a fan, a movable scraper, a grid, a coal cleaning chamber, a coal collection chamber, and a lower cover plate. The fan is installed on the outside of the coal cleaning device, and the air outlet of the fan is connected to the air outlet of the device by a pipe.

2. The pulverized coal recovery device for a belt conveyor according to claim 1, characterized in that... The coal cleaning device is equipped with an inclined filter cover, and a filter bag is installed at the rear end of the filter cover. The filter cover and the filter bag are fixedly connected to the flange clamp. The coal collecting device is equipped with upper and lower end covers. The upper end cover is equipped with an air inlet. The upper end cover and the surrounding device are equipped with sealing grooves. The flange clamp is installed on the sealing groove.

3. A pulverized coal recovery device for a belt conveyor according to claim 2, characterized in that... The coal cleaning device is equipped with a shear-type coal dust diffuser, which is connected to a high-speed rotating wind-powered cutter.

4. A pulverized coal recovery device for a belt conveyor according to claim 1, characterized in that... The movable scraper is located inside the coal cleaning device and is equipped with a retractable dustproof cylinder. The tip of the scraper is equipped with a rotatable brush, which makes soft contact with the lower grid.

5. A pulverized coal recovery device for a belt conveyor according to claim 1, characterized in that... The coal cleaning device is equipped with upper and lower cover plates.

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