Coal mine drum-type coal mining machine protection device

Abstract

This utility model relates to the field of coal mining technology, specifically a protective device for a drum-type coal mining machine. A fixed plate extending upwards is attached to the machine body near the walkway. The fixed plate is equipped with a height-adjustable baffle mechanism, and adjustable-angle guide mechanisms are hinged to both sides of the fixed plate. The height-adjustable baffle mechanism on the fixed plate increases the protective height when needed to block coal chunks and gangue that easily move from the mining side towards the walkway, preventing coal chunks from falling directly onto the walkway. This improves upon the existing problems of insufficient protection on the walkway side of coal mining machines, the potential for coal and gangue to threaten personnel safety, and the blockage of the walkway. The height-adjustable design of the baffle mechanism can adapt to different mine tunnel environments, avoiding the inability of the protective structure to function properly due to mine tunnel height limitations. The adjustable-angle guide mechanisms hinged to both sides of the fixed plate can guide the coal chunks accumulated on the machine body by adjusting the tilt angle.

Description

Technical Field

[0001] This utility model relates to the field of coal mining technology, specifically a protective device for a coal mine drum-type coal mining machine. Background Technology

[0002] In underground coal mining operations, the environment of the coal face is constantly changing due to the combined influence of geological conditions and mining activities. Factors such as unstable coal seams, variations in geological structure, and fluctuations in roadway pressure frequently lead to roof fracturing and coal wall spalling, especially as the face dip angle increases, introducing significant uncertainties to underground operational safety. As the core equipment in underground coal mining, the safety of the coal mining machine during operation directly impacts worker safety and mining efficiency, making it a crucial aspect requiring close attention in coal mine production.

[0003] Currently, during actual operation, coal mining machines lack specific protective structures on the side of the machine body closest to the pedestrian walkway. Coal chunks and gangue generated on the mining side, under the influence of gravity and the impact of equipment operation, easily move towards the pedestrian walkway. This not only poses a safety hazard to inspectors, maintenance workers, and other personnel who need to work close to the equipment, but may also cause pedestrian walkway blockage, forcing clearing personnel to enter the dangerous area to clean up, increasing labor intensity and safety risks. Simultaneously, coal chunks easily accumulate on the machine body, and after accumulating, they slide to both sides. When sliding towards the pedestrian walkway, this can also cause blockage. Furthermore, in the upper drum area of ​​the coal mining machine, coal chunks may fall onto the machine body and slide downwards, causing some coal flow to potentially spill onto the pedestrian walkway along the part of the machine body near the lower drum, further exacerbating safety hazards and increasing the difficulty of cleanup. These problems all need to be addressed through reasonable structural design. Utility Model Content

[0004] The present invention aims to solve the above-mentioned problems, thereby providing a protective device for a coal mine drum-type coal mining machine that reduces safety hazards on sidewalks.

[0005] The technical solution adopted by this utility model to solve the aforementioned problem is:

[0006] A protective device for a coal mine drum-type coal mining machine includes an upwardly extending fixed plate attached to the machine body near the walkway. The fixed plate is equipped with a height-adjustable baffle mechanism, and a flow guide mechanism with an adjustable tilt angle is hinged to both sides of the fixed plate.

[0007] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are:

[0008] A fixed, upward-extending plate is attached to the side of the coal mining machine closest to the walkway, providing a mounting base for the baffle and guide mechanisms. The height-adjustable baffle mechanism on the fixed plate can be adjusted to provide targeted protection. When needed, the protection height can be increased to block coal chunks and gangue that easily move from the mining side towards the walkway, preventing coal chunks from falling directly onto the walkway. This addresses the problems of existing coal mining machines lacking targeted protection on the walkway side, and the potential for coal and gangue to threaten personnel safety and block the walkway. Furthermore, due to variations in mine tunnel height, the height-adjustable design of the baffle mechanism can adapt to different mine tunnel environments, preventing damage caused by the mine tunnel... Height restrictions prevent the protective structure from functioning properly. This addresses the problem that existing structures cannot adapt to changes in mine tunnel height. The adjustable tilting guide mechanism hinged on both sides of the fixed plate can guide coal blocks accumulated on the machine body by adjusting the tilt angle. Especially on the side near the lower drum of the coal mining machine, the appropriate tilt angle can guide the coal blocks inward into the conveyor, reducing the situation where coal blocks accumulate on the machine body and slide down to the walkway side. This alleviates the problems of existing structures being unable to guide coal blocks in a directional manner, coal flow easily escaping along the machine body near the lower drum to the walkway, increasing cleaning difficulty and safety risks, and overall reducing safety hazards on the walkway.

[0009] As a preferred embodiment, a further technical solution of this utility model is:

[0010] Furthermore, the baffle mechanism includes a guard plate, with a matching groove and slide bar between the guard plate and the fixed plate. The guard plate is slidably engaged with the outer wall of the fixed plate. A lifting assembly is installed between the lower part of the fixed plate and the outer wall of the guard plate. The cooperation of the groove and slide bar provides stable guidance for the height adjustment of the guard plate, preventing the guard plate from shifting or shaking during lifting and ensuring the accuracy of height adjustment. The sliding engagement of the guard plate enhances the stability of the connection between the two, making the guard plate less prone to loosening when blocking the impact of coal and gangue. The lifting assembly between the lower part of the fixed plate and the outer wall of the guard plate can provide support and power from below the guard plate, helping the guard plate to smoothly achieve height adjustment. This not only ensures the adaptability of the baffle mechanism to different mine tunnel heights, but also improves the reliability of the guard plate in blocking coal and gangue, and improves the problems of unstable adjustment and insufficient impact resistance of existing protective structures.

[0011] Furthermore, the lifting assembly includes at least two first hydraulic jacks, which are connected in parallel oil circuits for synchronous lifting. The first hydraulic jacks are used as the lifting power components, and their strong thrust can adapt to the load brought by the impact of coal and gangue underground, ensuring that the guard plate can stably maintain the required height after adjustment.

[0012] Furthermore, the length of the guard plate is equal to the length of the coal mining machine body on the side closest to the walkway, so that the guard plate can fully cover the side of the coal mining machine body closest to the walkway. This avoids leaving protective gaps in the machine body due to insufficient guard plate length, and prevents coal and gangue from entering the walkway through the gaps. This further improves the problems of insufficient targeting and limited protection range of the existing protective structure, making the protection on the walkway side more comprehensive and reducing the safety hazards faced by the workers.

[0013] Furthermore, the flow guiding mechanism includes a flow guide plate, one side of which is hinged to the side of the fixed plate. A second hydraulic jack is installed between the flow guide plate and the fixed plate at the hinge point on the coal cutting side. As the core component for guiding the flow of coal blocks, the flow guide plate can be adjusted by hinge with the side of the fixed plate. The second hydraulic jack on the coal cutting side can precisely control the tilt angle of the flow guide plate. Especially on the side near the lower drum, the flow guide plate can be driven to fold inward by the second hydraulic jack, so that the coal blocks accumulated on the machine body can flow smoothly along the flow guide plate and avoid sliding towards the sidewalk. This alleviates the problem that the existing structure cannot guide the coal flow in a directional manner and that the coal blocks are prone to disorderly movement.

[0014] Furthermore, the sum of the lengths of the fixed plate and the two side guide plates is equal to the length of the coal mining machine body on the side closest to the walkway. This allows the fixed plate and the two side guide plates to jointly form a full lateral coverage of the coal mining machine body on the side closest to the walkway. This prevents coal blocks from escaping from both ends of the machine body to the walkway due to gaps in the lateral protection, further reducing the range of disorderly coal flow, decreasing the probability of the walkway being blocked by coal blocks, and reducing the labor intensity and safety risks for clearing personnel.

[0015] Furthermore, the fixed plate and the guide plate have the same working surface height, which allows them to form a smooth transition surface at the joint, reducing the retention of coal at the joint and improving the flow guiding efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of the machine body with rollers according to an embodiment of the present invention;

[0017] Figure 2 This is a rear view structural diagram of the roller-type machine body according to an embodiment of the present utility model;

[0018] Figure 3 This is a top view of the structure of the machine body without rollers according to an embodiment of the present utility model;

[0019] The components in the diagram are labeled as follows: 1. Body; 2. Fixing plate; 3. Protective plate; 4. First hydraulic jack; 5. Slide groove; 6. Slide bar; 7. Guide plate; 8. Second hydraulic jack. Detailed Implementation

[0020] The present invention will be further described below with reference to embodiments, the purpose of which is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0021] A protective device for a coal mining drum-type coal mining machine includes an upwardly extending fixing plate 2 that is attached and fixed to the machine body 1 near the walkway. The fixing plate 2 extends 200mm upward from the machine body and is fixed to the machine body 1 by a high-strength bolt group. The fixing plate 2 is equipped with a height-adjustable baffle mechanism, and the two sides of the fixing plate 2 are respectively hinged with a flow guide mechanism with an adjustable tilt angle. The fixing plate 2 is made of wear-resistant manganese steel with a thickness ≥15mm.

[0022] Furthermore, the baffle mechanism includes a guard plate 3, which has an adjustable height of 0-300mm above the fixed plate 2. The guard plate 3 is made of wear-resistant manganese steel with a thickness of ≥15mm. A sliding groove 5 and a sliding strip 6 are provided between the guard plate 3 and the fixed plate 2 for cooperation. The guard plate 3 is slidably engaged with the outer wall of the fixed plate 2. A lifting component is provided between the lower part of the fixed plate 2 and the outer wall of the guard plate 3. The cooperation of the sliding groove 5 and the sliding strip 6 provides a stable guide for the height adjustment of the guard plate 3, preventing the guard plate 3 from deviating or shaking during the lifting process, and ensuring the accuracy of the height adjustment. The sliding engagement of the guard plate 3 enhances the stability of the connection between the two, making the guard plate 3 less prone to loosening when blocking the impact of coal and gangue. The lifting component between the lower part of the fixed plate 2 and the outer wall of the guard plate 3 can provide support and power from below the guard plate 3, helping the guard plate 3 to smoothly achieve height adjustment. This not only ensures the adaptability of the baffle mechanism to different mine tunnel heights, but also improves the reliability of the guard plate 3 in blocking coal and gangue, and improves the problems of unstable adjustment and insufficient impact resistance of the existing protective structure.

[0023] Furthermore, the lifting assembly includes at least two first hydraulic jacks 4, which are connected in parallel by a hydraulic circuit for synchronous lifting. The first hydraulic jacks 4 are used as the lifting power components, and their strong thrust can adapt to the load brought by the impact of coal and gangue underground, ensuring that the guard plate 3 can stably maintain the required height after adjustment.

[0024] Furthermore, the length of the guard plate 3 is equal to the length of the machine body 1 on the side of the coal mining machine closest to the walkway, so that the guard plate 3 can cover the entire length of the machine body 1 on the side of the coal mining machine closest to the walkway. This avoids leaving protective gaps in the machine body 1 due to insufficient length of the guard plate 3, and prevents coal and gangue from entering the walkway through the gaps. This further improves the problem of insufficient targeting and limited protection range of the existing protective structure, making the protection on the side of the walkway more comprehensive and reducing the safety hazards faced by the workers.

[0025] Furthermore, the flow guiding mechanism includes a flow guide plate 7, which is made of wear-resistant manganese steel with a thickness ≥15mm. One side of the flow guide plate 7 is hinged to the side of the fixed plate 2. A second hydraulic jack 8 is installed between the hinge point of the flow guide plate 7 and the fixed plate 2 on the coal cutting side. The first hydraulic jack 4 and the second hydraulic jack 8 are mining explosion-proof type. The flow guide plate 7 can be adjusted from 0-60° tilt angle. As the core component guiding the flow of coal blocks, the flow guide plate 7 achieves folding adjustment through hinge with the side of the fixed plate 2. The second hydraulic jack 8 on the side can precisely control the tilt angle of the guide plate 7. Especially on the side near the lower roller, the second hydraulic jack 8 can drive the guide plate 7 to fold inward, so that the coal blocks accumulated on the machine body 1 can flow smoothly along the guide plate 7, avoiding them from sliding towards the sidewalk. This alleviates the problem that the existing structure cannot guide the coal flow in a directional manner and that the coal blocks are prone to disorderly movement. When the guide plate 7 is tilted to guide the flow, a very small portion of the coal blocks may fall onto the sidewalk through the top of the guide plate 7 and the guard plate, but this will not affect the use of the sidewalk.

[0026] Furthermore, the sum of the lengths of the fixed plate 2 and the two side guide plates is equal to the length of the machine body 1 on the side of the coal mining machine closest to the walkway. This allows the fixed plate 2 and the two side guide plates 7 to jointly form a full lateral coverage of the machine body 1 on the side of the coal mining machine closest to the walkway. This prevents coal blocks from escaping from both ends of the machine body 1 to the walkway due to gaps in the lateral protection, further reducing the range of disorderly coal flow, reducing the probability of the walkway being blocked by coal blocks, and lowering the labor intensity and safety risks for clearing personnel.

[0027] Furthermore, the fixed plate 2 and the guide plate 7 have the same working surface height, which enables them to form a smooth transition surface at the joint, reducing the retention of coal blocks at the joint and improving the guiding efficiency.

[0028] Before underground coal mining operations begin, the fixing plate 2 is first fixed to the body 1 of the coal mining machine near the walkway using high-strength bolts. This provides a stable installation foundation for the baffle mechanism and the guide mechanism, addressing the lack of a targeted protective structure on the side of the existing coal mining machine near the walkway. Then, based on the current mine tunnel height, the height of the guard plate 3 is adjusted using the lifting assembly between the lower part of the fixing plate 2 and the outer wall of the guard plate 3. The sliding groove 5 and sliding strip 6 used between the guard plate 3 and the fixing plate 2 provide stable guidance for the lifting of the guard plate 3, preventing it from shifting or swaying. When the mine tunnel height is low, the lifting assembly is controlled to move the guard plate 3 down the sliding groove 5 to reduce the overall height, adapting to changes in mine tunnel height and preventing the protective structure from being unusable due to mine tunnel height limitations. Simultaneously, the length of the guard plate 3 is equal to the length of the body 1 of the coal mining machine near the walkway, ensuring full coverage. Body 1, to avoid leaving protective gaps; after the coal mining machine starts cutting coal, when the coal blocks and gangue generated on the mining side move towards the sidewalk under the action of gravity and the impact force of equipment operation, the height-adjusted guard plate 3 can block the coal and gangue, preventing them from falling directly onto the sidewalk, reducing the safety threat to inspectors, electromechanical maintenance workers and other personnel, as well as the risk of sidewalk blockage; when coal blocks accumulate on the body 1 of the coal mining machine, and some coal blocks fall from the upper roller area onto the body 1 and slide downwards, by controlling the guide plate 7 on the lower roller side to fold inwards, the coal blocks accumulated on the body 1 are guided to flow inwards into the conveyor along the guide plate 7, preventing the coal blocks from sliding onto the sidewalk or rushing out onto the sidewalk along the part of the body 1 near the lower roller, reducing the cleaning burden caused by coal block accumulation, reducing the frequency of clearing personnel entering the dangerous area, and overall reducing the safety hazards to the sidewalk.

[0029] The above description is only a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A protective device for a coal mine drum-type coal mining machine, characterized in that: The coal mining machine has an upwardly extending fixed plate attached to its body near the walkway. The fixed plate is equipped with a height-adjustable baffle mechanism, and the fixed plate is hinged with a flow guide mechanism with an adjustable tilt angle on both sides.

2. The protective device for a coal mine drum-type coal mining machine according to claim 1, characterized in that: The baffle mechanism includes a guard plate, and a sliding groove and a sliding strip are provided between the guard plate and the fixed plate for cooperation. The guard plate is slidably engaged with the outer wall of the fixed plate, and a lifting component is provided between the lower part of the fixed plate and the outer wall of the guard plate.

3. The protective device for a coal mine drum-type coal mining machine according to claim 2, characterized in that: The lifting assembly includes at least two first hydraulic jacks, which are connected in parallel hydraulic circuits for synchronous lifting.

4. The protective device for a coal mine drum-type coal mining machine according to claim 2, characterized in that: The length of the guard plate is equal to the length of the coal mining machine body on the side closest to the walkway.

5. The protective device for a coal mine drum-type coal mining machine according to claim 1, characterized in that: The flow guiding mechanism includes a flow guiding plate, one side of which is hinged to the side of the fixed plate, and a second hydraulic jack is provided between the hinge of the flow guiding plate and the fixed plate on the coal cutting side.

6. The protective device for a coal mine drum-type coal mining machine according to claim 5, characterized in that: The sum of the lengths of the fixed plate and the guides on both sides is equal to the length of the coal mining machine body on the side closest to the walkway.

7. The protective device for a coal mine drum-type coal mining machine according to claim 5, characterized in that: The working surfaces of the fixed plate and the guide plate are at the same height.

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