A safety supporting device for coal mine tunneling

Abstract

The utility model discloses a kind of safety supporting devices for coal mine tunneling, including supporting column, supporting column inside is equipped with movable cavity, movable cavity inside is connected with moving plate and limit rod, limit rod top end is fixed with central support disc, there is multiple-point support disc in the position of the circumference array close to central support disc, the linear array has rotating plate at the connecting end of central support disc, the center of the bottom surface of multiple-point support disc is fixed with ball head, screw adjusting rod is connected between multiple-point support disc and rotating plate, central support disc cooperates with movable adjusting multiple-point support disc and is used in conjunction, greatly improve the top support area of supporting device, central support disc provides core load-bearing base, and multiple-point support disc distributed in circumference is flexibly adjusted to irregular contact surface of roadway roof by rotating plate, each support disc is connected with screw adjusting rod by ball head, realizes angle adjustment and height fine adjustment, and multiple-point support disc of independent control can be adjusted alone according to local situation.

Description

Technical Field

[0001] This utility model relates to the technical field of coal mining equipment, specifically a safety support device for coal mine tunneling. Background Technology

[0002] Support devices are used to support excavated passages such as roadways and working faces. During coal mine tunneling operations, the roof and sidewall rock strata of newly excavated roadways may collapse due to the loss of their original stress balance. Therefore, support devices are needed to prevent roadway collapse and ensure operational safety.

[0003] In the prior art, a safety support device for coal mine tunneling disclosed in patent publication number "CN214616598U" includes several support devices and a protective net. The tops of the support devices are uniformly fixed to the bottom of the protective net. Each support device consists of two support columns, a sliding groove, and a connecting column. Both ends of the connecting column are fixedly connected to support columns. The tops of the two support columns are provided with sliding grooves, and the interiors of the two sliding grooves are slidably connected to adjusting columns. The tops of the two adjusting columns are respectively fixedly connected to the two ends of an arc-shaped support plate. The two sides of the middle of the top of the connecting column are fixedly connected to first connecting blocks, and the two ends of the inner wall of the arc-shaped support plate are fixedly connected to second connecting blocks. This utility model provides a safety support device for coal mine tunneling. The height of the arc-shaped support plate is adjusted by an electric hydraulic column to adapt to the height of the roadway. During use, if the device settles and the support force is insufficient, the fixing screws can be loosened to raise the arc-shaped support plate again, thereby increasing the support force.

[0004] However, existing technologies still have significant shortcomings. Traditional safety support devices for coal mine tunneling are usually fixed rigid metal supports with limited support area and no flexible adjustment. They are difficult to install on the top surface of irregular coal mine passages and cannot provide effective support. Their integral structure has low flexibility and is difficult to install and disassemble. Utility Model Content

[0005] The purpose of this utility model is to provide a safety support device for coal mine tunneling to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a safety support device for coal mine tunneling, comprising a support column, wherein a movable cavity is provided inside the support column, a movable plate and a limiting rod are connected inside the movable cavity, a central support plate is fixed at the top of the limiting rod, multiple support plates are arranged in a circular array near the central support plate, a rotating plate is arranged in a linear array at the connecting end of the central support plate, and the rotating plates are sequentially sleeved on the surface of the connecting end of the central support plate from top to bottom, a ball head is fixed at the center of the bottom surface of the multiple support plates, and a threaded adjusting rod is connected between the multiple support plates and the rotating plates.

[0007] As can be seen, in the above technical solution, the central support plate works in conjunction with the movable and adjustable multi-point support plate, which greatly increases the top support area of ​​the support device. The central support plate provides the core load-bearing foundation, while the circumferentially distributed multi-point support plates are flexibly adjusted to the irregular contact surface of the roadway roof through the rotating plate. Each support plate achieves angle adjustment and height fine adjustment through the threaded adjustment rod connected by the ball head. The independently controlled multi-point support plate can be adjusted individually for local conditions.

[0008] Preferably, the surface of the movable plate cooperates with the inner wall of the movable cavity, and the two ends of the limiting rod are respectively fixed to the connecting end of the top surface of the movable plate and the central support plate, and the limiting rod is movably connected to the opening on the top surface of the support column.

[0009] As can be seen, in the above technical solution, the movable plate can be limited by the movable cavity and the limiting rod during the movement process.

[0010] Preferably, the support column is bolted to a foot, and a rangefinder is installed at one end of the foot.

[0011] As can be seen, in the above technical solution, the distance measuring device on the support leg is used to monitor the distance between the rotating plate and the distance measuring device to determine whether there is a collapse problem. The distance measuring device is a laser distance measuring device, and a connecting bracket can be added to the support leg as needed to install the distance measuring device in the specified position.

[0012] Preferably, a lead screw is installed inside the movable cavity, and the moving plate is threadedly connected to the surface of the lead screw, and a servo motor is installed at the bottom of the lead screw.

[0013] As can be seen, in the above technical solution, the screw lifting structure can quickly raise and lower the central support plate and the multi-point support plate to a suitable position, and quickly install the device in the support area of ​​the channel. It is simple to operate and easy to carry.

[0014] Preferably, the threaded adjusting rod is located inside the threaded hole of the rotating plate, and an anti-slip head is fixed to the bottom of the threaded adjusting rod.

[0015] As can be seen, in the above technical solution, the protective head is used by personnel to manually rotate the threaded adjustment rod to control the height of different multi-point support plates, so that the height of multiple multi-point support plates can be finely adjusted later.

[0016] Preferably, the top surface of the threaded adjusting rod is provided with a ball groove, and the ball head is located in the ball groove, and the maximum angle at which the ball head can move in the ball groove is 15°.

[0017] As can be seen, in the above technical solution, the ball head can be used to finely adjust the angle of the multi-point support plate to adapt to the top surface of the channel with different rules. The fit gap between the ball head and the ball groove is strictly controlled within the range of ±15° rotation. When a sudden collapse causes the tilt angle of the support plate to exceed the safety threshold or the impact load to exceed the threshold, the conical contact surface of the ball head and the ball groove will be quickly pressed together under the axial pressure of the multi-point support plate, forming a rigid connection through the wedge self-locking effect, ensuring that the support stiffness can still be maintained under the collapse condition.

[0018] Compared with the prior art, the beneficial effects of this utility model are: The use of a central support plate in conjunction with adjustable multi-point support plates significantly increases the top support area of ​​the support device. The multi-point support plates can rotate with the rotating plate to a suitable installation position, ensuring they are circumferentially distributed around the central support plate. Each rotating plate and multi-point support plate is independent. The multi-point support plates are connected to the threaded adjusting rod via ball joints, allowing for independent fine-tuning of their height and angle. Therefore, during installation, the multi-point support plates can be adjusted individually to ensure they abut against the top surface of mine roadways and other passageways. The central support plate provides… The core load-bearing foundation consists of a circumferentially distributed multi-point support plate, which is flexibly adjusted to the irregular contact surface of the tunnel roof via a rotating plate. Each support plate is adjusted in angle and finely adjusted in height via a threaded adjusting rod connected by a ball head. The independently controlled multi-point support plate can be adjusted individually for local conditions, avoiding stress concentration that could lead to secondary collapse. At the same time, the rotating plate mechanism allows for quick adjustment of the support plate layout, offering high flexibility. It can also be used in conjunction with a screw lifting structure to quickly raise and lower the central support plate and multi-point support plates to the appropriate positions, allowing for rapid installation of the device in the support area of ​​the tunnel. It is simple to operate and easy to carry. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a perspective view of the present utility model; Figure 3 This is a diagram of the internal structure of the protective column of this utility model; Figure 4 This is a front view of the present invention; Figure 5 This is a structural diagram of the multi-point support disk of this utility model; Figure 6 This is a schematic diagram of the threaded adjusting rod of this utility model.

[0020] In the diagram: 1. Support column; 2. Movable cavity; 3. Servo motor; 4. Lead screw; 5. Moving plate; 6. Limiting rod; 7. Central support plate; 8. Rotating plate; 9. Multi-point support plate; 10. Threaded adjusting rod; 11. Anti-slip head; 12. Ball groove; 13. Ball head; 14. Support leg; 15. Rangefinder. 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. 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.

[0022] Please see Figure 1-6 This utility model provides a technical solution: Example 1: A safety support device for coal mine tunneling: It includes a support column 1, with a movable cavity 2 inside the support column 1. A movable plate 5 and a limiting rod 6 are connected inside the movable cavity 2. A central support plate 7 is fixed to the top of the limiting rod 6. Multiple support plates 9 are arranged in a circular array near the central support plate 7. Because the internal space of coal mine roadways is narrow, and the top surface of the roadway is mostly an irregular curved surface, traditional support devices often have difficulty contacting the top support with the top surface of the roadway to find a suitable point of contact. This results in the device having limited effectiveness in support and protection, failing to prevent roadway collapse and ensure operational safety. This invention changes the traditional fixed support device by moving the support point from the center... The device is composed of a support plate 7 and a multi-point support plate 9. The multi-point support plate 9 is circumferentially distributed around the central support plate 7, giving the device multiple support points that simultaneously provide support and protection, greatly improving the support effect of the device. When used together with the fine-tuning structure of the multi-point support plate 9, the multi-point support plate 9 can be quickly rotated and adjusted to a suitable position according to the actual situation of the channel. When in use, the central support plate 7 and the multi-point support plate 9 are first raised and lowered together to a suitable height, ensuring that the central support plate 7 first contacts the top surface of the channel to provide support. Then, the angle is finely adjusted to ensure that the multi-point support plate 9 can abut against the irregular top surface of the channel. Finally, the height of the multi-point support plate 9 is adjusted individually to achieve contact with the top surface of the channel.

[0023] The surface of the movable plate 5 and the inner wall of the movable cavity 2 are mutually fitted, and the two ends of the limiting rod 6 are fixed to the top surface of the movable plate 5 and the connecting end of the central support plate, respectively. The limiting rod 6 is movably connected to the opening on the top surface of the support column 1. A lead screw 4 is installed in the movable cavity 2, and the movable plate 5 is threadedly connected to the surface of the lead screw 4. A servo motor 3 is installed at the bottom of the lead screw 4. To further explain, the cavity inside the support column 1 is the movable cavity 2, which contains multiple components such as the servo motor 3, the lead screw 4, and the movable plate 5. The movable plate 5 is sleeved on the surface of the lead screw 4 and threadedly connected to the surface of the lead screw 4. At the same time, the movable plate 5 and the inner wall of the movable cavity 2 are mutually fitted to form a limit. When the servo motor 3 drives the lead screw 4 to rotate, the movable plate 5 moves linearly up and down along the surface of the lead screw 4. Since the connecting end of the central support plate 7 is connected to the movable plate 5 through the limiting rod 6, and the limiting rod 6 is fitted into the interface on the top surface of the support column 1 and can move within the interface, the central support plate 7 connected to the limiting rod 6 can move up and down together when the movable plate 5 moves up and down.

[0024] The connecting end of the central support plate 7 has a linear array of rotating plates 8, and the rotating plates 8 are sequentially sleeved on the surface of the connecting end of the central support plate 7 from top to bottom. There are multiple sets of rotating plates 8 sequentially sleeved on the surface of the connecting end of the central support plate 7 from top to bottom. The rotating plates 8 are connected to the connecting end through bearings, which can ensure that the rotating plates 8 can be manually adjusted to a suitable position at any time, and ensure that the multi-point support plates 9 on the rotating plates 8 can be rotated to the appropriate installation position. At the same time, the rotating plates 8 and the central support plate 7 are integrated and can be adjusted in height along with the central support plate 7, which is suitable for passages of different heights.

[0025] A ball head 13 is fixed at the center of the bottom surface of the multi-point support plate 9. A ball groove 12 is opened on the top surface of the threaded adjusting rod 10, and the ball head 13 is located in the ball groove 12. The maximum angle that the ball head 13 can move in the ball groove 12 is 15°. The multi-point support plate 9 is connected to the threaded adjusting rod 10 in the threaded hole on the rotating plate 8 through the ball head 13. The ball head 13 is fitted into the ball groove 12 of the threaded adjusting rod 10. The fit clearance between the ball head 13 and the ball groove 12 is strictly controlled within the ±15° rotation range. When a sudden collapse causes the tilt angle of the support plate to exceed the safety threshold or the impact load to exceed the threshold, the conical contact surface of the ball head 13 and the ball groove 12 will be quickly pressed together under the axial pressure of the multi-point support plate 9. A rigid connection is formed through the wedge self-locking effect to ensure that the support rigidity can still be maintained under the collapse condition.

[0026] A threaded adjusting rod 10 is connected between the multi-point support plate 9 and the rotating plate 8. The threaded adjusting rod 10 is located in the threaded hole of the rotating plate 8. An anti-slip head 11 is fixed at the bottom of the threaded adjusting rod 10. The anti-slip head 11 at the end of the threaded adjusting rod 10 can be used by personnel to manually rotate and adjust the height of the multi-point support plate 9 at different positions, so that it can be finely adjusted. Finally, the friction between the multi-point support plate 9 and the top surface of the channel is used to achieve mutual restraint and ensure that the height of the multi-point support plate 9 will not change again when the threaded adjusting rod 10 is rotated without external force.

[0027] Support column 1 is bolted to support legs 14. A rangefinder 15 is installed at one end of the support legs 14. The support legs 14 arranged in a circular array on the surface of support column 1 support the bottom of the device. When the support legs 14 are aligned with the rotating plate 8, the rangefinder 15 can be directly installed. The rangefinder 15 is a laser rangefinder used to measure the distance between the rangefinder 15 and the rotating plate 8. When a collapse occurs, the multi-point support plate 9 is subjected to force and presses down on the rotating plate 8, causing one end of the rotating plate 8 to deform. At this time, the distance between the rangefinder 15 and the rotating plate 8 will change. At this time, the connected sound and light alarm can directly warn and remind the staff to evacuate quickly. Similarly, if the support legs 14 are not aligned with the rotating plate 8, an external bracket can be connected to ensure that the rangefinder 15 is located directly below the rotating plate 8 for use.

[0028] Working principle: The support device consists of a central support plate 7 and a multi-point support plate 9. The multi-point support plate 9 is circumferentially distributed around the central support plate 7, giving the device multiple support points that simultaneously provide support and protection, greatly improving the support effect. When used together with the fine-tuning structure of the multi-point support plate 9, it can be quickly rotated and adjusted to a suitable position according to the actual conditions of the passage. During use, the central support plate 7 and the multi-point support plate 9 are first raised and lowered together to a suitable height, ensuring that the central support plate 7 first contacts the top surface of the passage to provide support. Then, the angle is finely adjusted to ensure that the multi-point support plate 9 can abut against the irregular top surface of the passage. Finally, the height of the multi-point support plate 9 is adjusted individually to achieve contact with the top surface of the passage.

[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 safety support device for coal mine tunneling, characterized in that: The system includes a support column (1), which has an internal movable cavity (2). The movable cavity (2) is connected to a movable plate (5) and a limiting rod (6). A central support plate (7) is fixed at the top of the limiting rod (6). A multi-point support plate (9) is arranged in a circular array near the central support plate (7). A rotating plate (8) is arranged in a linear array at the connecting end of the central support plate (7). The rotating plates (8) are sequentially fitted onto the surface of the connecting end of the central support plate (7) from top to bottom. A ball head (13) is fixed at the center of the bottom surface of the multi-point support plate (9). A threaded adjusting rod (10) is connected between the multi-point support plate (9) and the rotating plate (8).

2. The safety support device for coal mine tunneling according to claim 1, characterized in that: The surface of the movable plate (5) cooperates with the inner wall of the movable cavity (2), and the two ends of the limiting rod (6) are fixed to the connection end of the top surface of the movable plate (5) and the central support plate, respectively, and the limiting rod (6) is movably connected to the opening on the top surface of the support column (1).

3. The safety support device for coal mine tunneling according to claim 1, characterized in that: The support column (1) is bolted to a foot (14), and a rangefinder (15) is installed at one end of the foot (14).

4. A safety support device for coal mine tunneling according to claim 1, characterized in that: A lead screw (4) is installed in the active cavity (2), and the moving plate (5) is threadedly connected to the surface of the lead screw (4). A servo motor (3) is installed at the bottom of the lead screw (4).

5. A safety support device for coal mine tunneling according to claim 1, characterized in that: The threaded adjusting rod (10) is located in the threaded hole of the rotating plate (8), and the bottom of the threaded adjusting rod (10) is fixed with an anti-slip head (11).

6. A safety support device for coal mine tunneling according to claim 1, characterized in that: The top surface of the threaded adjusting rod (10) is provided with a ball groove (12), and the ball head (13) is located in the ball groove (12), and the maximum angle that the ball head (13) can move in the ball groove (12) is 15°.

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