Turnback coal cleaning device of raw coal transportation system

Abstract

The invention provides a raw coal transportation system return coal cleaning device which comprises a plurality of sweepers installed on an unloading section of a rubber belt machine head, a spiral feeder is arranged below the sweepers, a bucket elevator is arranged on the side face of the sweepers, coal swept by the sweepers falls into the spiral feeder through a funnel-type coal collecting groove, the spiral feeder conveys the coal to the bucket elevator, and the bucket elevator is connected with the coal collecting groove. The bucket elevator transfers coal to the sealing-tape machine, through cooperative work of the multiple sweepers, the spiral feeder and the bucket elevator, the sweepers clean the return coal in a concentrated mode, the coal is prevented from being scattered in a roadway, the cleaned coal is transferred to the sealing-tape machine through the spiral feeder and the bucket elevator, closed-loop management is achieved, and manual intervention is reduced. A coal piling protection device is arranged, when the coal accumulation amount exceeds an allowable value, cleaning equipment is automatically started, excessive coal accumulation is prevented, caking coal in a hopper of the bucket elevator can be cleaned through the design of a compressed air nozzle, and it is ensured that the equipment continuously and efficiently operates; according to the invention, the safety risk of the adhesive tape machine transportation system is reduced, and the labor cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of raw coal transportation, in particular to a return coal cleaning device for a raw coal transportation system. Background Art

[0002] During the transport of raw coal, coal trapped on the return belt of a belt conveyor is squeezed by the rollers and idlers, causing backflow coal to spill into the roadway. If not cleaned promptly, this backflow coal can rub against the rotating rollers, idlers, or belt, posing a serious safety hazard such as fire. Manually cleaning backflow coal increases worker workload and can also cause personal injury during conveyor transport. Most coal mining companies strictly prohibit cleaning backflow coal while the conveyor is operating. Relying solely on maintenance time to clean backflow coal requires a significant investment of manpower, which is detrimental to mine development. When backflow coal accumulates significantly in the conveyor roadway, the conveyor maintenance unit must dedicate significant personnel to cleaning it, even while the conveyor is operating, compromising mine safety. Coal spillage at the tail drop point of the conveyor or from belt deviation can occur. This spillage is carried by the return belt to the tail of the conveyor and enters the space between the tail roller and the belt, causing the tail roller diameter to change and the belt to deviate at the tail roller. This can lead to serious accidents such as belt tearing and fires caused by friction. Summary of the Invention

[0003] In view of this, in order to solve the problems existing in the technical background, the present invention proposes a return coal cleaning device for a raw coal transportation system. Specifically, it includes the following contents:

[0004] A return coal cleaning device for a raw coal transportation system comprises a multi-channel sweeper installed in the unloading section of a belt conveyor head, a screw feeder is provided below the sweeper, and a bucket elevator is provided on the side, the coal cleaned by the sweeper falls into the screw feeder through a funnel-type coal collecting trough, the screw feeder transports the coal to the bucket elevator, and the bucket elevator transfers the coal to the belt, the belt comprises an upper belt and a lower belt, coal baffles and guardrails are provided on both sides of the belt, a compressed air nozzle is provided at the unloading point above the bucket elevator, when the bucket elevator hopper is sticky with coal, the compressed air nozzle is controlled to clean the hopper, a swing arm type coal pile protector is provided below the sweeper, and the coal pile protection is activated when there is a lot of coal pile, and the operation of the screw feeder and the bucket elevator is controlled to avoid coal accumulation exceeding the allowable amount.

[0005] In one embodiment of the present invention, a valve is provided on the side of the guardrail close to the sidewalk, and an AI intelligent recognition camera is installed next to the sweeper to monitor the coal accumulation status and personnel activities.

[0006] In one embodiment of the present invention, a coal pile protection device is provided under the bucket elevator. When there is a lot of coal pile, the operation of the screw feeder and the bucket elevator is controlled to prevent the coal accumulation from exceeding the allowable amount.

[0007] In one embodiment of the present invention, automatic deviation-correcting devices are provided at both ends of the sweeper to prevent the tape from deviating.

[0008] In one embodiment of the present invention, a cleaning space is reserved under the screw feeder and the bucket elevator to prevent cleaning when coal accumulates.

[0009] The above technical solution has the following beneficial effects:

[0010] Through the coordinated work of the multi-channel sweepers, spiral feeders and bucket elevators, the sweepers centrally clean the return coal to prevent coal from spilling into the tunnels, and the spiral feeders and bucket elevators are used to transfer the cleaned coal to the belt conveyor, realizing closed-loop management and reducing manual intervention; the coal pile protection device is set to automatically start the cleaning equipment when the accumulated coal amount exceeds the allowable value to prevent excessive coal accumulation. The combination of guardrails, coal baffles and AI intelligent recognition cameras ensures the safety of personnel operation and realizes remote monitoring. The design of the compressed air nozzle can clean the sticky coal in the bucket elevator hopper to ensure the continuous and efficient operation of the equipment; the present invention not only reduces the safety risk of the belt conveyor transportation system, but also reduces labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of a return coal cleaning device for a raw coal transportation system of the present invention. Figure 1 ;

[0012] Figure 2 This is a schematic diagram of the structure of a return coal cleaning device for a raw coal transportation system of the present invention. Figure 2 ;

[0013] Figure 3 This is the structural diagram of the modified nose unloading section;

[0014] Figure 4 This is the structural diagram of the nose unloading section before modification;

[0015] Figure 5 This is a schematic diagram of the structure of the tail section after modification;

[0016] Figure 6 This is a structural diagram of the tail section before modification;

[0017] In the figure: 1- compressed air descaling nozzle; 2- coal baffle; 3- bucket elevator; 4- coal pile protection device; 5- adhesive tape; 6- guardrail; 7- swing arm type coal pile protector; 8- coal collecting chute; 9- screw feeder; 10- sweeper. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example 1, see Figure 1 and Figure 2 The shown device for cleaning return coal of a raw coal transportation system includes a multi-channel cleaner 10 installed in the unloading section of the belt conveyor head, a screw feeder 9 is provided below the cleaner 10, and a bucket elevator 3 is provided on the side, the coal cleaned by the cleaner 10 falls into the screw feeder 9 through the funnel-type coal collecting trough 8, the screw feeder 9 transports the coal to the bucket elevator 3, and the bucket elevator transfers the coal to the belt, the belt includes an upper belt and a lower belt, wherein the bucket elevator 3 transfers the coal to the upper belt, coal baffles 2 and guardrails 6 are provided on both sides of the upper belt, a compressed air descaling nozzle 1 is provided at the unloading point above the bucket elevator 3, when the bucket elevator 3 bucket is sticky with coal, the compressed air descaling nozzle 1 is controlled to clean the bucket, a swing arm type coal pile protector 7 is provided below the cleaner 10, and the coal pile protection action is taken when there is a lot of coal pile, and the operation of the screw feeder 9 and the bucket elevator 3 is controlled to avoid coal accumulation exceeding the allowable amount.

[0020] Example 2, based on Example 1, the guardrail 6 in this embodiment is provided with a valve near the sidewalk, an AI intelligent recognition camera is installed next to the sweeper 10 to monitor the coal accumulation status and personnel activities, and a coal pile protection device 4 is provided under the bucket elevator 3. When there is a lot of coal pile, the operation of the screw feeder 9 and the bucket elevator 3 is controlled to avoid coal accumulation exceeding the allowable amount. Automatic correction devices are provided at both ends of the sweeper 10 to prevent the lower belt from deviating. Cleaning space is reserved under the screw feeder 9 and the bucket elevator 3 to prevent cleaning when coal accumulates.

[0021] See also Figure 3 and Figure 4As shown, a multi-pass cleaner 10 is installed at the unloading section of the conveyor belt conveyor head. A screw feeder 9 is located below the cleaner 10, and a bucket elevator 3 is installed on the side. The return coal cleaned by the cleaner 10 falls through a funnel-shaped coal chute 8 into the screw feeder 9, where it is then transported to the bucket elevator 3. The bucket elevator 3 ultimately transfers the coal to the upper conveyor belt. Coal retaining plates 2 and guardrails 6 are located on both sides of the upper conveyor belt. The guardrail 6 has a valve on the side of the sidewalk to facilitate manual cleaning. A compressed air descaling nozzle 1 is installed at the unloading point above the bucket elevator 3. When an AI intelligent recognition camera detects coal sticking to the hopper, it controls the compressed air descaling nozzle 1 to automatically clean the hopper. A swing-arm coal pile protector 7 is located below the cleaner 10. When the coal accumulation exceeds a set value, the protector activates the screw feeder 9 and bucket elevator 3 to clean the coal. Cleaning space is reserved below the screw feeder 9 and bucket elevator 3 to facilitate emergency handling in the event of coal accumulation. In addition, automatic deviation-correcting devices are installed at both ends of the cleaner 10 to prevent the lower belt from straying. The entire system is remotely monitored via AI-powered intelligent recognition cameras, ensuring a safe and controllable cleaning process.

[0022] Example 3, see Figure 5 and Figure 6 As shown, this embodiment addresses coal spillage from the tail conveyor bottom belt, the tail drop point, or the upper belt deviation. A sweeper 10 and bucket elevator 3 are installed in front of the tail redirection drum to transfer the spilled coal to the upper belt, preventing it from entering the tail conveyor belt. A bucket wheel excavator is installed in the rearward extension of the tail conveyor to lift the return coal cleaned by the oblique sweeper 10. A bucket wheel excavator discharge hopper is installed on the side of the upper belt, dropping coal onto the upper belt. A return coal receiving hopper is installed next to the oblique sweeper 10 at the tail conveyor, dropping coal into the bucket wheel excavator receiving hopper.

[0023] Example 3, based on Example 1, adds a centralized cleaning unit behind the belt conveyor tensioner to improve cleaning efficiency and minimize spillage of return coal throughout the belt conveyor lane when the head unloading section cannot completely clean the return coal. The centralized cleaning unit consists of a cleaner assembly 10, a spiral feeder 9, a bucket elevator 3, a coal pile protection device 4, a coal collection chute 8, a safety device, an AI video monitor, and a coal cleaning compressed air duct (i.e., the duct where the compressed air descaling nozzle 1 is located). The sweeper 10 cleans the return coal. When the return coal falls into the coal collecting trough 8 and reaches a certain amount, the coal pile protection device 4 is activated, and the screw feeder 9 and the bucket elevator 3 are controlled to operate in a chain manner to transport the return coal to the upper belt; by adjusting the coal baffle 2 above the upper belt, it is ensured that the return coal falls in the middle of the upper belt and does not cause the upper belt to deviate; the accumulated coal in the bucket elevator 3 hopper is cleaned through the coal cleaning compressed air pipe (the pipe where the compressed air descaling nozzle 1 is located) to keep the bucket elevator 3 in normal operation; the safety protection device ensures that personnel will not touch the running belt conveyor when cleaning the return coal in the coal collecting trough 8, and remote monitoring is achieved through AI video monitoring. The maintenance space of the spiral feeder 9 and the bucket elevator 3 is planned in advance to ensure the virtuous cycle of the centralized cleaning unit. The contact between the added sweeper 10 and the lower belt will generate friction. If the force is uneven, it will cause the lower belt to deviate. In this embodiment, automatic deviation correction devices are added at both ends of the added sweeper 10 to prevent the lower belt from deviating and causing malfunctions.

[0024] The present invention centrally controls the returned coal and scattered coal generated during the operation of the belt conveyor, effectively improving the safe operation of the belt conveyor, reducing the safety risks of the belt conveyor, reducing the labor cost of the belt conveyor transportation system, improving the system maintenance performance, promoting the efficient operation of the belt conveyor transportation system, and promoting the healthy development of the belt conveyor transportation system.

[0025] The present invention has a reasonable structure and is easy to operate, can effectively solve the problem of cleaning the returned coal, and improve the safety and efficiency of the belt conveyor transportation system.

[0026] The above describes the basic principles and main features of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the invention to be protected. The scope of protection of the invention is defined by the attached claims and their equivalents.

Claims

1. A return coal cleaning device for a raw coal transportation system, characterized in that: The invention comprises a multi-channel cleaner (10) installed at the unloading section of the belt conveyor head, a screw feeder (9) is provided below the cleaner (10), and a bucket elevator (3) is provided on the side. The coal cleaned by the cleaner (10) falls into the screw feeder (9) through a funnel-shaped coal collecting trough (8). The screw feeder (9) conveys the coal to the bucket elevator (3), and the bucket elevator (3) transfers the coal to the belt conveyor (5). The belt conveyor (5) comprises an upper belt conveyor and a lower belt conveyor. A belt (5) is provided with coal-blocking plates (2) and guardrails (6) on both sides of the belt (5); a compressed air nozzle (1) is provided at the unloading point above the bucket elevator (3); when the bucket elevator (3) hopper is sticky with coal, the compressed air nozzle (1) is controlled to clean the hopper; a swing-rod type coal pile protector (7) is provided below the sweeper (10); when a large amount of coal is piled, the coal pile protection is activated to control the operation of the screw feeder (9) and the bucket elevator (3) to prevent the coal from accumulating beyond the allowable amount.

2. The return coal cleaning device of the raw coal transportation system according to claim 1 is characterized in that: The guardrail (6) is provided with a valve on the side close to the sidewalk, and an AI intelligent recognition camera is installed next to the sweeper (10) to monitor the coal accumulation status and personnel activities.

3. The return coal cleaning device of the raw coal transportation system according to claim 1 is characterized in that: A coal pile protection device (4) is provided below the bucket elevator (3). When a large amount of coal is piled, the operation of the screw feeder (9) and the bucket elevator (3) is controlled to prevent the coal from being accumulated beyond an allowable amount.

4. The return coal cleaning device of the raw coal transportation system according to claim 1, characterized in that: Automatic deviation-correcting devices are provided at both ends of the sweeper (10) to prevent the adhesive tape (5) from deviating.

5. The return coal cleaning device of the raw coal transportation system according to claim 1, characterized in that: A cleaning space is reserved below the screw feeder (9) and the bucket elevator (3) to prevent cleaning when coal is accumulated.

Images