A system for preventing coal backflow when a scraper machine runs empty chain

Abstract

The utility model discloses a system for preventing coal backflow when scraper conveyor runs back empty chain, scraper conveyor and belt conveyor are set in vertical state, scraper conveyor is set in one roadway, belt conveyor is set in another roadway, and two roadways are in vertical intersection state, scraper conveyor is used for transporting and unloading coal on belt conveyor, the system comprises: air inlet steel pipe, a plurality of air injection nozzles are installed on the air inlet steel pipe, the installation angle of each air injection nozzle and the transport direction of scraper conveyor are in a degree included angle, the utility model can greatly reduce the condition of coal backflow when scraper conveyor runs back empty chain, and also can avoid coal escaping and falling into belt conveyor.

Description

Technical Field

[0001] This utility model belongs to the field of scraper conveyors, and in particular relates to a system for preventing coal backflow during the operation of the scraper conveyor's return chain. Background Technology

[0002] Scraper conveyors are core transportation equipment in underground coal mine working faces, primarily used for the continuous transport of bulk materials such as coal and gangue. They are adaptable to various scenarios including roadways and working faces. Their core structure consists of a scraper chain, chute, drive unit, tensioning device, and head and tail sections. The scraper chain is driven by a motor to circulate within the chute, using the scrapers to propel the material for transport. Scraper conveyors are highly adaptable, capable of handling complex geological conditions such as soft coal seams. They can be arranged along horizontal, inclined, or curved routes, with conveying capacities ranging from tens to thousands of tons per hour. They are robust, have a low failure rate, can withstand the harsh underground environment of humidity and dust, and can be integrated with coal mining machines, transfer conveyors, and other equipment to form a highly efficient mining and transportation system.

[0003] However, the scraper conveyor suffers from severe coal backflow during operation, often resulting in the scraper conveyor stalling and seriously affecting production. Utility Model Content

[0004] The purpose of this invention is to provide a system for preventing coal backflow during the operation of a scraper conveyor's return chain, in order to solve the serious problem of coal backflow during scraper conveyor operation, which often leads to the scraper conveyor stalling.

[0005] The present invention adopts the following technical solution: a system for preventing coal backflow during the operation of a scraper conveyor's return chain, wherein the scraper conveyor and the belt conveyor are arranged in a vertical position, the scraper conveyor is located in one roadway, and the belt conveyor is located in another roadway, the two roadways are arranged in a vertically intersecting position; the scraper conveyor is used to transport and unload coal onto the belt conveyor. The system includes: The air inlet steel pipe is horizontally installed below the head of the scraper conveyor, and its upper side is fixedly connected to the scraper conveyor. Its direction is perpendicular to the coal conveying direction of the scraper conveyor. One end of the air inlet steel pipe is closed, and the other end is connected to the compressed air pipeline. Multiple air nozzles are installed on the air inlet steel pipe; the installation angle of each air nozzle is at a 45-degree angle to the conveying direction of the scraper conveyor. Each jet nozzle is used to generate blowing force on the coal unloaded from the scraper conveyor or the coal returning, so that all the coal falls onto the belt conveyor, thereby preventing the scraper conveyor from carrying coal back.

[0006] The beneficial effects of this utility model are: This invention can significantly reduce the situation of coal backflow during the operation of the scraper conveyor's return chain, and can also prevent coal from escaping and falling into the belt conveyor. This invention can generate a blowing force on the coal unloaded from the scraper conveyor or the coal that is returned, so that all the coal falls onto the belt conveyor, thereby preventing the scraper conveyor from carrying coal back. This invention, by setting up a coal shield, can block the drifting coal, thereby ensuring that all the coal falls onto the belt conveyor and preventing the coal from detaching from the belt conveyor. Attached Figure Description

[0007] Figure 1 This is a first-view structural schematic diagram of the present invention; Figure 2 This is a structural schematic diagram of the present invention from a second perspective.

[0008] Among them: 10. Scraper conveyor; 11. Belt conveyor; 12. Air inlet steel pipe; 13. Air nozzle; 14. Coal shielding plate; 15. Fixed vertical plate. Detailed Implementation

[0009] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0010] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more. The term "orientation" in this utility model refers to the orientation of the utility model within the... Figure 1 Description of the state's progression.

[0011] This utility model discloses a system for preventing coal backflow during the operation of a scraper conveyor's return chain, such as... Figure 1 and 2As shown, the scraper conveyor 10 and the belt conveyor 11 are arranged vertically. The scraper conveyor 10 is located in one roadway, and the belt conveyor 11 is located in another roadway. The two roadways are perpendicularly intersecting. The scraper conveyor 10 is used to transport coal and unload it onto the belt conveyor 11.

[0012] The system includes: an air intake steel pipe 12 and multiple air nozzles 13.

[0013] The air inlet steel pipe 12 is set horizontally and is located below the head of the scraper conveyor 10. The upper side of the air inlet steel pipe 12 is fixedly connected to the scraper conveyor 10, and the direction of the air inlet steel pipe 12 is perpendicular to the coal conveying direction of the scraper conveyor 10. One end of the air inlet steel pipe 12 is closed, and the other end of the air inlet steel pipe 12 is connected to the compressed air pipeline.

[0014] Multiple air nozzles 13 are installed on the air inlet steel pipe 12; the installation angle of each air nozzle 13 is at a 45-degree angle to the transport direction of the scraper conveyor 10.

[0015] Each jet nozzle 13 is used to generate blowing force on the coal unloaded from the scraper conveyor 10 or the coal that is returned, so that all the coal falls onto the belt conveyor 11, thereby preventing the scraper conveyor 10 from carrying coal back.

[0016] The present invention also includes: a coal shielding plate 14, which is located on the side of the belt conveyor 11 and on the side where the scraper conveyor 10 is not installed; the coal shielding plate 14 and the jet nozzle 13 are symmetrically arranged on both sides of the belt conveyor 11, and the coal shielding plate 14 is used to shield the coal that is blown away by the jet nozzle 13, so that all the coal falls onto the belt conveyor 11.

[0017] Preferably, the lower side of the coal shielding plate 14 is fixed to the roadway floor by a fixing plate 15.

[0018] Preferably, one side of the coal shield 14 is fixedly connected to the frame of the belt conveyor 11. Example

[0019] Because the scraper conveyor 10 in the 21511 transport roadway head section 150 is overloaded with coal, it frequently stalls, which seriously affects production.

[0020] The present invention is used for improvement. A 0.5m long 4-point air inlet steel pipe 12 is used. One end of the air inlet steel pipe 12 is sealed, and the other end of the air inlet steel pipe 12 is welded with a Φ19 straight pipe. Φ10mm round holes are drilled 0.15m away from both ends of the air inlet steel pipe 12. A 0.2m long 4-point iron pipe is welded to the round hole as an air nozzle 13. The processed air inlet steel pipe 12 is fixed to the lower side of the head of the 40T scraper conveyor 10. Then, a coal shielding plate 14 is installed on the side of the belt conveyor 11 through a fixed upright plate 15. A compressed air pipe is connected to the air inlet steel pipe 12. Compressed air blows the back coal below the scraper conveyor 10 onto the coal shielding plate 14 through the air inlet steel pipe 12 to prevent the back coal from being pulled below the scraper conveyor 10 and reduce the phenomenon of the scraper conveyor 10 being suffocated by back coal.

[0021] By installing this utility model, the phenomenon of coal suffocation in the scraper conveyor 10 can be reduced, thus reducing the impact on production. Based on the calculation of 2 suffocation incidents per shift, the impact of suffocation is reduced by 6 incidents per shift. Each incident affects the production by about 1 hour, totaling about 6 hours, thus reducing the impact on production by 6 hours per day.

[0022] Required materials: The above description is only a preferred embodiment of the present utility model and is 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 should be included within the protection scope of the present utility model.

Claims

1. A system for preventing coal backflow during the operation of a scraper conveyor's return chain, characterized in that, The scraper conveyor (10) and the belt conveyor (11) are arranged vertically. The scraper conveyor (10) is located in one roadway, and the belt conveyor (11) is located in another roadway. The two roadways are perpendicularly intersecting. The scraper conveyor (10) is used to transport coal and unload it onto the belt conveyor (11). The system includes: The air inlet steel pipe (12) is horizontally set and located below the head of the scraper conveyor (10). Its upper side is fixedly connected to the scraper conveyor (10), and its direction is perpendicular to the coal conveying direction of the scraper conveyor (10). One end of the air inlet steel pipe (12) is closed, and the other end is connected to the compressed air pipeline. Multiple air nozzles (13) are installed on the air inlet steel pipe (12); the installation angle of each air nozzle (13) is at a 45-degree angle to the transport direction of the scraper conveyor (10); Each of the jet nozzles (13) is used to generate a blowing force on the coal unloaded from the scraper conveyor (10) or the coal that is returned, so that all the coal falls onto the belt conveyor (11), thereby preventing the scraper conveyor (10) from carrying coal back.

2. The system for preventing coal backflow during the operation of the scraper conveyor's return chain according to claim 1, characterized in that, Also includes: A coal shielding plate (14) is located on the side of the belt conveyor (11) and on the side where the scraper conveyor (10) is not installed. The coal shielding plate (14) and the jet nozzle (13) are symmetrically arranged on both sides of the belt conveyor (11). The coal shielding plate (14) is used to shield the coal that is blown away by the jet nozzle (13) and thus make all the coal fall onto the belt conveyor (11).

3. A system for preventing coal backflow during the operation of a scraper conveyor's return chain according to claim 2, characterized in that, The lower side of the coal shielding plate (14) is fixed to the roadway floor by a fixed upright plate (15).

4. A system for preventing coal backflow during the operation of a scraper conveyor's return chain according to claim 2, characterized in that, One side of the coal shield (14) is fixedly connected to the frame of the belt conveyor (11).

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