A roof support mechanism for a longwall face

Abstract

This utility model discloses a roof support mechanism for a longwall mining face, including a hydraulic support formed by a top beam. Steel beams are symmetrically fixedly connected to the outer side of the top beam, and connecting seats are slidably connected to the outer side of the steel beams. A push plate is hinged between two connecting seats. A rotating component is installed on the outer side of one of the connecting seats, and a moving component is installed on one side of the top beam. This utility model relates to the field of hydraulic support technology. This roof support mechanism for a longwall mining face uses push plates to clear ore and coal accumulated on the top of the top beam, causing the ore and coal to fall to the side of the longwall mining face, eliminating the need for manual cleaning and improving the safety of underground operations. Simultaneously, clearing the ore and coal on the top of the top beam prevents the accumulated ore and coal from increasing the weight of the hydraulic support itself, reducing the difficulty and power loss of moving equipment on the hydraulic support. The automatically cleaned top beam improves the support effect on the roof.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic support technology, specifically a roof protection mechanism for a longwall mining face. Background Technology

[0002] Hydraulic supports are key equipment in modern fully mechanized coal mining faces, used to support and manage the roof, maintain a safe working space, and move automatically alongside mining operations. Hydraulic supports protect the roof of the coal mine's longwall face, preventing roof collapse during mining operations and thus avoiding mine collapse that could bury mining equipment and underground workers, thereby improving the safety of coal mine operations. Hydraulic supports consist of mechanical components such as a top beam, a shield beam, and a base. Hydraulic jacks lift the top beam, which then protects the coal mine roof.

[0003] During coal mining, the hydraulic supports, which serve as the roof protection mechanism, need to be moved to the working face area first. After the top beams of the hydraulic supports support the coal mine roof, the mining equipment is moved deeper into the mine shaft. Before moving the hydraulic supports, the top beams are lowered to separate from the mine roof. The hydraulic supports are then transported using forklifts or trailers. Because some coal mine roofs have low stability, after the top beams of the hydraulic supports separate from the roof, some ore or coal chunks fall off and land on top of the hydraulic support top beams. Due to the tilting of the top beams during the descent... Even at a relatively small angle, large chunks of ore and coal will still adhere to the top of the top beam. The accumulated ore or coal will not only increase the weight of the top beam, making the overall weight of the hydraulic support more heavy and increasing the difficulty of moving the hydraulic support, but also increase the power loss of the transportation equipment. At the same time, the ore and coal piled on the top of the top beam will also affect the support effect of the top beam on the coal mine roof after the support is moved. The protruding ore and coal will affect the uniformity of the roof support force. Therefore, workers need to use mechanical equipment to clean it regularly, which will pose a personal safety hazard to the workers working underground.

[0004] Therefore, this utility model provides a roof support mechanism for a longwall mining face to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a roof support mechanism for longwall mining faces, solving the aforementioned problems.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a roof support mechanism for a longwall mining face, comprising a hydraulic support composed of a roof beam, steel beams symmetrically and fixedly connected to the outer side of the roof beam, connecting seats slidably connected to the outer side of the steel beams, a push plate hinged between the two connecting seats, a rotating component installed on the outer side of one of the connecting seats, and a moving component installed on one side of the roof beam; The moving component includes a servo motor B fixedly connected to one side of the top beam. The output end of the servo motor B is fixedly connected to a bidirectional lead screw, and the bidirectional lead screw is threadedly connected to the connecting seat located on the same side.

[0007] Preferably, the rotating component includes a servo motor A fixedly connected to the outside of one of the connecting seats, a gear A fixedly connected to the output end of the servo motor A, and a gear B fixedly connected to one side of the push plate, wherein the gear A and the gear B mesh with each other.

[0008] Preferably, the pusher plate is L-shaped.

[0009] Preferably, a limiting groove is provided on the outer side of the connecting seat, and the limiting groove is arc-shaped with an included angle of 30°.

[0010] Preferably, a limiting rod is symmetrically fixedly connected to the outer side of the push plate, and the limiting rod is installed inside the limiting groove.

[0011] Preferably, the push plate has a slot on its inner side, a pressure plate is hinged inside the slot, and torsion springs are symmetrically fixed between the pressure plate and the push plate.

[0012] Preferably, the maximum rotation angle of the pressure plate is set to 30°. Beneficial effects

[0013] This utility model provides a roof support mechanism for a longwall mining face. Compared with the prior art, it has the following advantages: The roof support mechanism of this longwall face uses push plates to clear the ore and coal lumps accumulated on the top of the roof beams, causing the ore and coal lumps to fall to the side of the longwall face in the coal mine, eliminating the need for manual cleaning and improving the safety of underground operations. At the same time, clearing the ore and coal lumps on the top of the roof beams prevents the accumulated ore and coal lumps from increasing the weight of the hydraulic supports, reducing the difficulty and power loss of moving equipment on the hydraulic supports. Furthermore, the roof beams, after being automatically cleaned, prevent the accumulated ore and coal lumps from affecting the support effect of the roof beams on the coal mine roof. Attached Figure Description

[0014] Figure 1 This is a perspective view of the external structure of this utility model; Figure 2 This is a schematic diagram of the connection structure of the connecting seat and the push plate of this utility model; Figure 3 This is a schematic diagram of the connection structure between gear A and gear B of this utility model; Figure 4 This is a schematic diagram of the structure of the pressure plate of this utility model.

[0015] In the diagram: 1. Top beam; 2. Steel beam; 3. Connecting seat; 4. Push plate; 5. Rotating component; 501. Servo motor A; 502. Gear A; 503. Gear B; 6. Moving component; 601. Servo motor B; 602. Two-way lead screw; 7. Limit groove; 8. Limit rod; 9. Slot; 10. Pressure plate; 11. Torsion spring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1:

[0017] Please see Figure 1-3 A roof support mechanism for a longwall mining face includes a hydraulic support consisting of a roof beam 1. A steel beam 2 is symmetrically fixedly connected to the outer side of the roof beam 1. A connecting seat 3 is slidably connected to the outer side of the steel beam 2. A push plate 4 is hinged between the two connecting seats 3. A rotating part 5 is installed on the outer side of one of the connecting seats 3. A moving part 6 is installed on one side of the roof beam 1. The rotating part 5 and the moving part 6 are installed on the same side of the roof beam 1. The moving part 6 includes a servo motor B601 fixedly connected to one side of the top beam 1. The output end of the servo motor B601 is fixedly connected to a bidirectional lead screw 602, and the bidirectional lead screw 602 is threadedly connected to the connecting seat 3 located on the same side.

[0018] The rotating component 5 includes a servo motor A501 fixedly connected to the outside of one of the connecting seats 3. The output end of the servo motor A501 is fixedly connected to a gear A502. A gear B503 is fixedly connected to one side of the push plate 4. Gears A502 and B503 mesh with each other. Both gears A502 and B503 are installed inside the connecting seat 3.

[0019] Push plate 4 is L-shaped.

[0020] A limiting groove 7 is provided on the outer side of the connecting seat 3. The limiting groove 7 is arc-shaped and has an included angle of 30°.

[0021] Limiting rods 8 are symmetrically fixedly connected to the outer side of the push plate 4, and the limiting rods 8 are installed inside the limiting groove 7.

[0022] In this embodiment, before the hydraulic support moves to the mining area underground, the top beam 1 of the hydraulic support will first descend. As the top beam 1 separates from the roof of the coal mine, some ore and coal will fall onto the top of the top beam 1 due to the relatively loose roof in some parts of the coal mine. The ore and coal accumulating on the top of the top beam 1 increases the weight of the hydraulic support itself and may even cause the hydraulic device used to lift the top beam 1 to overload and be damaged. After the top beam 1 descends, the servo motor 501 drives the gear A502 fixed at its output end to rotate inside the connecting seat 3. The rotating gear A502 drives the gear B503 to rotate, thereby causing the push plate 4 connected to the gear B503 to flip on the top of the top beam 1, pushing... After the push plate 4 flips, the servo motor B601 drives the bidirectional lead screw 602 fixed at the output end to rotate, thereby causing the push plate 4 to move on the top of the top beam 1, and then pushes the ore and coal on the top of the top beam 1 to the side of the coal mine working face. The limiting groove 7 set at 30° and the limiting rod 8 installed on the outside of the push plate 4 cause the push plate 4 to flip 30°. The tilted push plate 4 improves its cleaning effect on the ore and coal on the top of the top beam 1. During the cleaning process, it is not necessary for workers to climb up and clean manually, which improves the safety of cleaning the underground hydraulic support. At the same time, by cleaning the ore and coal piled on the top of the top beam 1, the difficulty of transporting the hydraulic support is reduced, and the power loss of the mobile equipment on the transport of the hydraulic support is reduced. Example 2:

[0023] Please see Figure 1-4 Based on Embodiment 1, this embodiment provides a technical solution for a roof support mechanism for a longwall mining face: a slot 9 is provided on the inner side of the push plate 4, a pressure plate 10 is hinged inside the slot 9, and a torsion spring 11 is symmetrically fixedly connected between the pressure plate 10 and the push plate 4.

[0024] The maximum rotation angle of the pressure plate 10 is set to 30°.

[0025] In this embodiment, after the push plate 4 is flipped and unfolded, the torsion spring 11 drives the pressure plate 10 to rotate 30° inside the slot 9. The rotated pressure plate 10 and push plate 4 form an inverted V-shaped structure. At the same time, during the movement of the push plate 4, the pressure plate 10 will not rotate and will be stored in the slot 9 inside the push plate 4, further improving the cleaning effect of ore and coal on the top of the top beam 1.

[0026] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0027] Working principle: After the mining work is completed at one end of the coal mine face, the hydraulic equipment of the hydraulic support drives the top beam 1 to descend. At this time, the top beam 1 separates from the roof of the coal mine. Due to the relatively loose soil in some parts of the coal mine roof, some ore and coal blocks naturally fall and land on top of the top beam 1. After the top beam 1 of the hydraulic support descends, the servo motor A501 drives the gear A502 fixed at its output end to rotate inside the connecting seat 3. The rotating gear A502 drives the push plate 4 connected to the gear B503 to flip on top of the top beam 1. At the same time, the limiting rod 8 on the outside of the push plate 4 is in the connecting seat 3. The push plate 4 rotates within the outer limiting groove 7. Because the limiting groove 7 is set at a 30° angle, the push plate 4 rotates 30°. As the push plate 4 separates from the top beam 1, the torque generated by the torsion spring 11 drives the pressure plate 10 to rotate within the inner limiting groove 7 of the push plate 4. Simultaneously, one side of the pressure plate 10 contacts the top of the steel beam 2. The pressure plate 10 can only rotate in one direction within the limiting groove 7, preventing it from being retracted into the slot 9 due to resistance from ore and coal during cleaning, thus affecting the cleaning effect of the push plate 4 and pressure plate 10 on the ore and coal on the top of the top beam 1. After unfolding... The pressure plate 10 and push plate 4 form an inverted V-shaped structure, further improving the cleaning effect of the push plate 4 on the ore and coal on the top beam 1. After the pressure plate 10 is unfolded, the servo motor B601 drives the fixed bidirectional lead screw 602 at the output end to rotate. The rotating bidirectional lead screw 602 drives the two connecting seats 3 to move between the two sets of steel beams 2, thereby causing the push plate 4 and pressure plate 10 to push the ore and coal on the top beam 1 to fall to the side of the coal mine's longwall face. An automated mechanical structure is used to periodically clean the top beam 1 of the hydraulic support to prevent the accumulation of ore and coal from increasing the size of the hydraulic support. The weight of the top beam 1 is reduced to prevent excessive pressure and damage to the hydraulic structure connected to it. At the same time, the ore and coal on the top of the top beam 1 are cleaned regularly to reduce the difficulty of hydraulic support handling and reduce the power loss of hydraulic support handling equipment. In addition, the cleaned top beam 1 improves the uniformity of its support force on the coal mine roof. When the push plate 4 is not being cleaned, the flipped push plate 4 fits against the top beam 1. Meanwhile, the pressure plate 10 is stored in the slot 9 inside the push plate 4 to prevent the protruding push plate 4 from affecting the support effect of the top beam 1 on the coal mine roof.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A roof support mechanism for a longwall mining face, comprising a hydraulic support formed by a roof beam (1), characterized in that: A steel beam (2) is symmetrically fixedly connected to the outer side of the top beam (1), and a connecting seat (3) is slidably connected to the outer side of the steel beam (2). A push plate (4) is hinged between the two connecting seats (3). A rotating part (5) is installed on the outer side of one of the connecting seats (3), and a moving part (6) is installed on one side of the top beam (1). The moving part (6) includes a servo motor B (601) fixedly connected to one side of the top beam (1). The output end of the servo motor B (601) is fixedly connected to a bidirectional lead screw (602). The bidirectional lead screw (602) and the connecting seat (3) located on the same side are threadedly connected.

2. The roof support mechanism for a longwall mining face according to claim 1, characterized in that: The rotating component (5) includes a servo motor A (501) fixedly connected to the outside of one of the connecting seats (3). The output end of the servo motor A (501) is fixedly connected to a gear A (502). A gear B (503) is fixedly connected to one side of the push plate (4). The gear A (502) and the gear B (503) mesh with each other.

3. The roof support mechanism for a longwall mining face according to claim 1, characterized in that: The push plate (4) is L-shaped.

4. The roof support mechanism for a longwall mining face according to claim 1, characterized in that: The connecting seat (3) has a limiting groove (7) on its outer side. The limiting groove (7) is arc-shaped and has an included angle of 30°.

5. The roof support mechanism for a longwall mining face according to claim 4, characterized in that: The push plate (4) is symmetrically fixedly connected to a limiting rod (8), which is installed inside the limiting groove (7).

6. The roof support mechanism for a longwall mining face according to claim 1, characterized in that: The push plate (4) has a slot (9) on its inner side, and a pressure plate (10) is hinged inside the slot (9). A torsion spring (11) is symmetrically fixed between the pressure plate (10) and the push plate (4).

7. The roof support mechanism for a longwall mining face according to claim 6, characterized in that: The maximum rotation angle of the pressure plate (10) is set to 30°.

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