Novel rear coal pushing mechanism of coal mine top coal caving hydraulic support

Abstract

The utility model discloses a novel rear coal pushing mechanism of a coal mine top coal caving hydraulic support, which relates to the technical field of coal mining and comprises a top coal caving support, a fixed cylinder is fixedly connected to the bottom position behind the top coal caving support, and pushing jacks are arranged on the left side and the right side in the fixed cylinder. A connecting plate is connected to the power output end of the pushing jack in the height direction, a first pushing plate is fixedly connected to the rear portion of the connecting plate, the connecting plate and the first pushing plate are pushed through the pushing jack in the fixing cylinder, large pushing force can be generated, coal behind the top coal caving support can be effectively pushed forwards, the coal pushing efficiency is improved, and the coal pushing efficiency is improved. And a driving motor rotates to drive a gear to rotate, so that a connecting rod I and a connecting rod II are driven to rotate, and a conical crushing hammer I and a conical crushing hammer II are driven to crush the coal. And therefore, large coal blocks can be crushed into small blocks, subsequent transportation and treatment are facilitated, and meanwhile, the coal can be prevented from blocking the coal pushing channel.

Description

Technical Field

[0001] This utility model relates to the field of coal mining technology, and in particular to a new type of coal mine top coal caving hydraulic support rear coal pushing mechanism. Background Technology

[0002] A top coal hydraulic support is a large-scale support device used in thick coal seam mining, primarily for roof management and top coal caving operations in fully mechanized mining faces. Its core function is to provide stable support through a hydraulic system, ensuring the safety and controllability of the roof during mining, while simultaneously enabling efficient mining in conjunction with top coal caving technology. The support consists of a top beam, base, columns, a four-bar linkage mechanism, and a hydraulic control system. It features a robust structure with high working resistance, allowing it to adapt to changes in coal seam thickness and roof pressure fluctuations.

[0003] When the top coal hydraulic support is in operation, a large amount of loose coal will accumulate behind the hydraulic support. The problem of coal accumulation behind the top coal hydraulic support is becoming increasingly serious. If the loose coal behind the top coal hydraulic support is not cleaned in time, it will greatly affect the underground workers' inspection and maintenance of equipment such as the scraper conveyor behind the support, thereby reducing its practicality. Utility Model Content

[0004] The purpose of this utility model is to solve the problems mentioned in the background art and to propose a new type of coal pushing mechanism for the rear of a hydraulic support for top coal caving in coal mines.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A novel coal caving hydraulic support rear coal pushing mechanism for coal mines includes a coal caving support, a fixed cylinder is fixedly connected to the bottom position of the rear of the coal caving support, and pushing jacks are arranged on the left and right sides inside the fixed cylinder. The power output end of the pushing jacks is connected to a connecting plate at a height.

[0007] A push plate is fixedly connected to the rear of the connecting plate, and a protective plate is fixedly connected to the front of the push plate. A drive motor is located at the middle position in front of the push plate, and the protective plate is located below the protective plate. A drive rod is provided at the power output end of the drive motor, and a crushing component is provided behind the drive rod.

[0008] Preferably, the crushing component includes a drive gear, and transmission gears are meshed on both the left and right sides of the drive gear.

[0009] Preferably, a connecting rod one is fixedly connected to the middle position behind the drive gear, and a connecting rod two is fixedly connected to the middle position behind the transmission gear.

[0010] Preferably, a conical breaker hammer is fixedly connected to the rear of the first connecting rod, and a conical breaker hammer is fixedly connected to the rear of the second connecting rod.

[0011] Preferably, a connecting sleeve is fixedly connected to the bottom position behind the push plate, and electric push rods are provided on both the left and right sides of the inner wall of the connecting sleeve, and a second drive rod is provided at the power output end of the electric push rod.

[0012] Preferably, a push plate is fixedly connected to the rear of the drive rod 2, and a telescopic baffle is fixedly connected to the top position in front of the push plate 2.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention utilizes a pusher jack within a fixed cylinder to drive the connecting plate and pusher plate one, generating significant thrust. This effectively pushes coal forward from behind the top coal caving support, improving coal pushing efficiency and reducing coal accumulation at the rear of the support. Furthermore, a drive motor drives drive rod one, which in turn drives drive gears. Through meshing transmission, these gears on both sides rotate, causing connecting rod one and connecting rod two to drive conical breaker hammers one and two to crush the coal. This helps break larger pieces of coal into smaller pieces, facilitating subsequent transportation and processing, while also preventing coal from clogging the coal pushing channel. Attached Figure Description

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the rear coal pushing mechanism of a novel hydraulic support for top coal caving in coal mines, as proposed in this utility model.

[0017] Figure 2 This is a schematic diagram of the fixed cylinder structure proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of the crushing component structure proposed in this utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the connecting sleeve proposed in this utility model.

[0020] In the diagram: 1. Top coal caving support; 2. Fixed cylinder; 3. Pushing jack; 4. Connecting plate; 5. Push plate one; 6. Drive motor; 7. Drive rod one; 8. Crushing assembly; 9. Drive gear; 10. Transmission gear; 11. Connecting rod one; 12. Connecting rod two; 13. Conical breaker one; 14. Conical breaker two; 15. Connecting sleeve; 16. Electric push rod; 17. Drive rod two; 18. Push plate two; 19. Telescopic baffle; 20. Protective plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Example 1

[0023] Reference Figures 1-4 A novel coal caving hydraulic support rear coal pushing mechanism includes a top coal caving support 1, a fixed cylinder 2 fixedly connected to the bottom position of the rear of the top coal caving support 1, and pushing jacks 3 arranged on the left and right sides inside the fixed cylinder 2. The power output end of the pushing jacks 3 is connected to a connecting plate 4 at a height.

[0024] A push plate 5 is fixedly connected to the rear of the connecting plate 4, and a protective plate 20 is fixedly connected to the front of the push plate 5. A drive motor 6 is located in the middle of the front of the push plate 5, and the protective plate 20 is located below the protective plate 20. A drive rod 7 is provided at the power output end of the drive motor 6, and a crushing component 8 is located behind the drive rod 7. The top coal caving support 1 is the supporting foundation of the entire mechanism, providing installation positions and support for other components. The fixed cylinder 2 is fixed to the bottom rear of the top coal caving support 1 and is used to install the pushing jack 3. It plays a role in positioning and protecting the pushing jack 3, and also provides a stable starting position for the operation of the entire coal pushing mechanism.

[0025] The pusher jack 3 is one of the power sources for the coal pushing mechanism. Powered by a hydraulic system, it enables telescopic movement. Its power output end is connected to the connecting plate 4. When the pusher jack 3 telescopically extends or retracts, it drives the connecting plate 4 to move back and forth, thereby pushing the pusher plate 5, which is fixedly connected to the connecting plate 4. This allows for coal pushing, moving coal from behind the top coal caving support 1. It can gradually push the loose coal at the rear of the support towards the rear scraper conveyor, allowing it to flow downstream along the central trough of the scraper conveyor. This effectively cleans the coal pile behind the top coal caving support 1.

[0026] The crushing assembly 8 includes a drive gear 9, with transmission gears 10 meshing on both its left and right sides. The drive gear 9 rotates under the influence of drive rod 7. Since the drive gear 9 meshes with the transmission gears 10 on both sides, it drives both transmission gears 10 to rotate simultaneously. The rotation of the transmission gears 10 is transmitted to the cone-shaped breaker hammers 13 and 14 via connecting rod 11 and connecting rod 2, respectively, causing the two cone-shaped breaker hammers to rotate at high speed, crushing the coal and breaking larger pieces into smaller pieces for easier subsequent transportation and processing.

[0027] The drive gear 9 is driven to rotate by the drive motor 6 through the drive rod 7. As the driving gear, when the drive gear 9 rotates, the meshing of the teeth of the gear will drive the transmission gear 10 that meshes with it to rotate, thereby transmitting the power of the drive motor 6 to the transmission gear 10, realizing the distribution and transmission of power, so that the crushing component 8 can work normally.

[0028] A connecting rod 11 is fixedly connected to the middle position behind the drive gear 9, and a connecting rod 12 is fixedly connected to the middle position behind the transmission gear 10. The drive gear 9 is driven to rotate by the drive motor 6 through the drive rod 7. The connecting rod 11, fixedly connected to the middle position behind the drive gear 9, can transmit the rotational power of the drive gear 9. Because the drive gear 9 is the driving wheel, the torque and power generated by its rotation can be transmitted to the subsequently connected components through the connecting rod 11, enabling the entire crushing system to operate.

[0029] The transmission gear 10 meshes with the drive gear 9 and is driven to rotate by the drive gear 9. The connecting rod 12, which is fixedly connected to the middle of the rear of the transmission gear 10, can continue to transmit the rotational power obtained by the transmission gear 10, ensuring that the power is transmitted from the drive gear 9 to the transmission gear 10 in sequence, and then transmitted to the corresponding working parts through the connecting rod 12.

[0030] A conical breaker hammer 13 is fixedly connected to the rear of connecting rod 11, and a conical breaker hammer 14 is fixedly connected to the rear of connecting rod 12. During rotation, the conical breaker hammers 13 and 14 utilize their conical structure and the centrifugal and impact forces generated by high-speed rotation to crush the coal. When encountering heavy and large coal, the coal is subjected to a combination of forces, including compression, shearing, and impact, under the action of the breaker hammers, thus being crushed into smaller particles.

[0031] Connecting rod 11 and connecting rod 212 connect the drive gear 9 and the transmission gear 10 to the corresponding hydraulic breaker, respectively, ensuring the stability and accuracy of power transmission. Simultaneously, the two hydraulic breakers work together to cover a larger crushing area, improving crushing efficiency. Furthermore, their symmetrical arrangement balances the forces during operation, reducing equipment vibration and wear.

[0032] A connecting sleeve 15 is fixedly connected to the bottom rear of push plate 5. Electric push rods 16 are installed on both the left and right sides of the inner wall of the connecting sleeve 15. A drive rod 17 is installed at the power output end of the electric push rod 16. A push plate 18 is fixedly connected to the rear of the drive rod 17. A telescopic baffle 19 is fixedly connected to the top front of push plate 18. The power output end of the electric push rod 16 is connected to the drive rod 17, and the telescopic movement of the electric push rod 16 is transmitted to push plate 18 through the drive rod 17. This allows push plate 18 to move back and forth with the telescopic movement of the electric push rod 16, thereby pushing the coal and achieving an auxiliary coal pushing function.

[0033] The telescopic baffle 19 is fixed at the top front of the pusher plate 18. During the coal pushing process, the telescopic baffle 19 acts as a barrier, preventing coal from spilling from above the pusher plate 18. Especially when the pusher plate 18 pushes against a high accumulation of coal, the telescopic baffle 19 effectively confines the coal within the pusher plate 18's range of action, ensuring the coal is smoothly pushed to the designated position. Simultaneously, it protects the drive motor 6 from damage caused by the impact of falling coal, extending the drive motor 6's service life and improving its practicality.

[0034] When the top coal hydraulic support is in operation, a large amount of loose coal will accumulate behind the hydraulic support. The problem of coal accumulation behind the top coal hydraulic support is becoming increasingly serious. If the loose coal behind the top coal hydraulic support is not cleaned in time, it will greatly affect the underground workers' inspection and maintenance of equipment such as the scraper conveyor behind the support, thereby reducing its practicality.

[0035] Install the top coal caving support 1 at the designated location underground in the coal mine, ensuring that the fixing cylinder 2 is securely connected to the bottom rear of the top coal caving support 1. Check the wiring connections and operating status of components such as the pushing jack 3, drive motor 6, and electric push rod 16 to ensure normal operation. Start the pushing jack 3; the power output end of the pushing jack 3 pushes the connecting plate 4, which in turn moves the push plate 5 forward. The push plate 5 then begins to push the coal behind the top coal caving support 1 forward, completing the coal pushing action. This gradually pushes the loose coal at the rear of the support towards the rear scraper conveyor, where it flows downstream along the central trough of the scraper conveyor. This clears the coal pile at the rear of the top coal caving support 1, allowing inspectors to monitor the equipment operation and roof management at the rear of the support at any time.

[0036] During coal pushing, the drive motor 6 is started, and the drive motor 6 drives the crushing component 8 through the drive rod 7. The drive rod 7 drives the drive gear 9 to rotate, and the drive gear 9 meshes with the transmission gears 10 on the left and right sides, so that the transmission gears 10 rotate synchronously. The drive gear 9 drives the conical breaker hammer 13 to rotate through the connecting rod 11, and the transmission gear 10 drives the conical breaker hammer 14 to rotate through the connecting rod 12. The two conical breaker hammers cooperate with each other to crush large pieces of coal encountered during the coal pushing process, which facilitates the subsequent transportation of coal. If the coal accumulation is complex and it is necessary to adjust the coal pushing force, the electric push rods 16 on the left and right sides of the inner wall of the connecting sleeve 15 are activated. The electric push rod 16 pushes the push plate 18 to extend or retract via the drive rod 17. The position of the push plate 18 is adjusted according to actual needs, thereby changing the pushing force and range, making the pushing work more efficient. During the pushing process, the telescopic baffle 19 moves synchronously with the push plate 18 to prevent coal from falling from above the push plate 18 and damaging the drive motor 6, ensuring that the coal can be pushed smoothly to the designated position, reducing coal waste and environmental pollution.

[0037] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A novel coal pushing mechanism at the rear of a hydraulic support for top coal caving in coal mines, comprising a top coal caving support (1), characterized in that: A fixed cylinder (2) is fixedly connected to the bottom position behind the top coal caving support (1). Pushing jacks (3) are set on the left and right sides inside the fixed cylinder (2). A connecting plate (4) is connected to the power output end of the pushing jacks (3). A push plate (5) is fixedly connected to the rear of the connecting plate (4), and a protective plate (20) is fixedly connected to the front of the push plate (5). A drive motor (6) is provided at the middle position in front of the push plate (5), and the protective plate (20) is located below the protective plate (20). A drive rod (7) is provided at the power output end of the drive motor (6), and a crushing component (8) is provided behind the drive rod (7).

2. The novel coal pushing mechanism at the rear of a hydraulic support for top coal caving in coal mines according to claim 1, characterized in that, The crushing component (8) includes a drive gear (9), and transmission gears (10) are meshed on both the left and right sides of the drive gear (9).

3. The novel coal pushing mechanism at the rear of a hydraulic support for top coal caving in coal mines according to claim 2, characterized in that, A connecting rod 1 (11) is fixedly connected to the middle position behind the drive gear (9), and a connecting rod 2 (12) is fixedly connected to the middle position behind the transmission gear (10).

4. The novel coal pushing mechanism at the rear of a hydraulic support for top coal caving in coal mines according to claim 3, characterized in that, A conical breaker hammer (13) is fixedly connected to the rear of the first connecting rod (11), and a conical breaker hammer (14) is fixedly connected to the rear of the second connecting rod (12).

5. The novel coal pushing mechanism at the rear of a hydraulic support for top coal caving in coal mines according to claim 1, characterized in that, A connecting sleeve (15) is fixedly connected to the bottom position behind the push plate (5). Electric push rods (16) are provided on both the left and right sides of the inner wall of the connecting sleeve (15). A drive rod (17) is provided at the power output end of the electric push rod (16).

6. The novel coal pushing mechanism at the rear of a hydraulic support for top coal caving in coal mines according to claim 5, characterized in that, A push plate (18) is fixedly connected to the rear of the drive rod (17), and a telescopic baffle (19) is fixedly connected to the top position in front of the push plate (18).

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