Transition support for entry self-retaining

Abstract

The utility model relates to the technical field of coal mine production, in particular to a transition support for a self-retained roadway. According to the technical scheme, the device comprises a first arc-shaped plate, a second arc-shaped plate, a support body, a bolt, a threaded rod, a connecting plate and a positioning rod, a groove is formed in the front end of the support body, rotating shafts are rotationally connected to the two sides of the top end of the inner wall of the groove correspondingly, and rotating shafts are rotationally connected to the two sides of the bottom end of the inner wall of the groove correspondingly; the upper end and the lower end of the first arc-shaped plate are inserted into the second arc-shaped plates correspondingly, fixing plates are fixed to the upper end and the lower end of one side of the first arc-shaped plate correspondingly, the top end of the threaded rod penetrates through the fixing plates and is in threaded connection with the fixing plates, a rotating rod is fixed to the top end of the threaded rod, and the top end of the rotating rod is rotationally connected with the lower surface of the connecting plate. One side of the connecting plate is fixed to one side of the outer wall of the second arc-shaped plate. The coal pillar protection device has the advantages that coal pillars with different lengths can be conveniently protected, and the coal pillars are prevented from being collided, so that the coal pillars are prevented from being fractured, collapsed and dangerous.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine production, in particular to a transition bracket for a reserved lane. Background Art

[0002] Coal pillars in a coal mine's reserved lanes refer to the coal seams or coal bodies located around the mining face, providing support and protection. During the mining process, miners typically leave a certain width of unmined coal areas, forming coal pillars, to maintain the stability of the mine's geological structure and prevent goaf collapse. These pillars support the surrounding strata and distribute ground pressure, reducing the risk of geological hazards in the mine. Coal pillars in coal mines' reserved lanes are typically installed based on mine design, mining methods, and safety requirements, and are a crucial component of safe coal mine production. During coal mining operations, coal pillars are left in the reserved lanes for support, but unprotected, they can easily break when impacted, causing mine collapse and posing a life-threatening health risk to workers.

[0003] A Chinese patent discloses a tunnel support bracket (authorization announcement number CN217632502U). The patented technology mainly includes a base, a movable seat is provided on the top of the base, a column is provided at the top center of the movable seat, the end of the column away from the base is fixedly connected to the top seat, a hydraulic cylinder is fixedly connected to the top center of the top seat, and a top beam plate is provided on the top of the hydraulic cylinder. The hydraulic cylinder can drive the top beam plate to rise and fall, thereby adjusting the height of the top beam plate, and the support bracket can be adjusted according to the height of the tunnel. It has a wide range of applications. The movable seat can easily drive the column to move, thereby facilitating the movement and adjustment of the column. The two connecting rods can rotate with the top beam plate, so that the two connecting rods and the top beam plate form a triangular structure. The structure is simple, the support bracket can be adjusted according to the height of the tunnel, and at the same time, the support bracket can have better stability.

[0004] However, this patent still has some shortcomings. During coal mining, coal pillars are left in the reserved tunnel for support. However, the coal pillars are unprotected and easily break when hit, causing the coal mine to collapse, posing a life and health hazard to workers. Therefore, those skilled in the art have provided a transition support for reserved tunnels to address the problems raised in the above background technology. Utility Model Content

[0005] The purpose of the utility model is to provide a transition support for a private tunnel, which has the advantage of being able to protect coal pillars of different lengths and prevent the coal pillars from being hit, causing the coal pillars to break, forming a collapse, and causing danger. It solves the problem that during coal mine production, coal pillars are left in the private tunnel for support, but the coal pillars are not protected and are easily broken by impact, causing the coal mine to collapse, posing a life and health risk to the workers.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a transition bracket for a self-reserved tunnel, comprising an arc-shaped plate 1, an arc-shaped plate 2, a bracket body, a bolt, a threaded rod, a connecting plate and a positioning rod, a groove is provided at the front end of the bracket body, and the two sides of the top end of the inner wall of the groove are respectively rotatably connected to the rotating shaft, and the two sides of the bottom end of the inner wall of the groove are respectively rotatably connected to the rotating shaft, the rotating shaft is fixed to the arc-shaped plate 1, the upper and lower ends of the arc-shaped plate 1 are respectively inserted into the arc-shaped plate 2, and the upper and lower ends of one side of the arc-shaped plate 1 are respectively fixed with fixed plates, the top end of the threaded rod passes through the fixed plate and is threadedly connected, the top end of the threaded rod is fixed with a rotating rod, the top end of the rotating rod is rotatably connected to the lower surface of the connecting plate, and one side of the connecting plate is fixed to one side of the outer wall of the arc-shaped plate 2.

[0007] Preferably, the upper and lower ends of the arc plate 1 are respectively provided with arc slots, into which the arc plate 2 is inserted. The arc slots facilitate the insertion of the arc plate 2 and facilitate the adjustment of the up and down movement of the arc plate 2, thereby facilitating the protection of coal pillars of different lengths left in the reserved lane.

[0008] Preferably, the width of the arc slot formed in the arc plate 1 matches the width of the arc plate 2, and the arc slot is vertically aligned with the center of the arc plate 2. By matching the width of the arc slot with the width of the arc plate 2, the arc plate 2 is easily inserted into the arc slot and can easily move up and down in the arc slot.

[0009] Preferably, a limiting plate is fixed to the front end of the arc-shaped plate 1, and a threaded hole 1 is opened on one side of the limiting plate. A bolt passes through the threaded hole 1 and is threadedly connected. A nut passes through the bolt and is threadedly connected. By the bolt passing through the threaded hole 1 and being threadedly connected, the arc-shaped plates 1 on both sides can be limited, which facilitates the protection of coal pillars of different lengths left in the reserved roadway.

[0010] Preferably, a second threaded hole is formed on the lower surface of the fixing plate, the top end of the threaded rod passes through the second threaded hole and is threadedly connected, and a turntable is fixed to the bottom end of the threaded rod. The second threaded hole facilitates the threaded rod to pass through and be threadedly connected, so that the height of the arc-shaped plate can be adjusted by rotating the threaded rod, thereby facilitating the protection of coal pillars of different heights.

[0011] Preferably, the upper surface of the curved plate 2 is fixed with the curved plate 3, and the lower surface of the curved plate 3 is provided with a positioning hole, through which the top of the positioning rod passes. By fitting the upper and lower curved plates 3 to the top and bottom of the reserved tunnel respectively, and then inserting the positioning rod through the positioning hole into the reserved tunnel, the curved plates 1, 2, and 3 can be defined, thereby facilitating the protection of the coal pillar and preventing collisions that could cause the coal pillar to break, collapse, and create danger.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] The utility model inserts the upper and lower ends of the arc plate one into the arc plate two respectively, and the upper and lower ends of one side of the arc plate one are respectively fixed with fixing plates, the top of the threaded rod passes through the fixing plate and is threadedly connected, and a rotating rod is fixed to the top of the threaded rod, and the top of the rotating rod is rotatably connected to the lower surface of the connecting plate, and one side of the connecting plate is fixed to one side of the outer wall of the arc plate two. When it is necessary to protect the coal pillar left in the coal mine reserved lane, the coal pillar is sleeved in the two arc plates one, and then the threaded rod is rotated so that the arc plate two can move up and down as needed, so that the arc plate three fits the top and bottom ends of the reserved lane, so that the coal pillar can be protected by the arc plate one and the arc plate two, thereby achieving the effect of facilitating the protection of coal pillars of different lengths and preventing the coal pillars from being hit, causing the coal pillars to break, forming collapse, and causing danger. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0015] Figure 2 This is a side structural diagram of the present utility model;

[0016] Figure 3 This is a schematic cross-sectional structural diagram of a curved plate of the present invention;

[0017] Figure 4 This is a schematic cross-sectional view of the limiting plate structure of the present invention;

[0018] Figure 5 This is a schematic cross-sectional structural diagram of the fixing plate of the present invention;

[0019] Figure 6 This is a schematic diagram of the cross-sectional structure of the arc plate of the present invention.

[0020] In the figure: 1. Arc plate 1; 2. Arc plate 2; 3. Arc plate 3; 4. Bracket body; 5. Groove; 6. Arc slot; 7. Rotating shaft; 8. Limiting plate; 9. Bolt; 10. Nut; 11. Threaded hole 1; 12. Turntable; 13. Fixing plate; 14. Threaded rod; 15. Rotating rod; 16. Connecting plate; 17. Threaded hole 2; 18. Positioning rod; 19. Positioning hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0022] See also Figures 1 to 6The utility model provides an embodiment: a transition bracket for a self-retained tunnel, comprising an arc-shaped plate 1, an arc-shaped plate 2, a bracket body 4, a bolt 9, a threaded rod 14, a connecting plate 16 and a positioning rod 18. A groove 5 is provided at the front end of the bracket body 4. The top of the inner wall of the groove 5 is rotatably connected to the rotating shaft 7 on both sides, and the bottom of the inner wall of the groove 5 is rotatably connected to the rotating shaft 7 on both sides. The rotating shaft 7 is fixed to the arc-shaped plate 1, and a limiting plate 8 is fixed at the front end of the arc-shaped plate 1. A threaded hole 11 is provided on one side of the limiting plate 8. One side of the bolt 9 passes through the threaded hole 11 and is threadedly connected. One side of the bolt 9 passes through a nut 10 and is threadedly connected. By passing the bolt 9 through the threaded hole 11 and being threadedly connected, the arc-shaped plates 1 on both sides can be limited, which is convenient for protecting coal pillars of different lengths left in the self-retained tunnel.

[0023] The upper and lower ends of the arc plate 1 are respectively inserted into the arc plate 2 2. The upper and lower ends of the arc plate 1 are respectively provided with an arc slot 6, and the arc plate 2 2 is inserted into the arc slot 6. The width of the arc slot 6 opened by the arc plate 1 matches the width of the arc plate 2 2. At the same time, the arc slot 6 is vertically aligned with the center of the arc plate 2 2. The arc slot 6 facilitates the insertion of the arc plate 2 2 and the adjustment of the up and down movement of the arc plate 2 2, which is convenient for protecting coal pillars of different lengths left in the reserved lane. The width of the arc slot 6 matches the width of the arc plate 2 2, which facilitates the insertion of the arc plate 2 2 into the arc slot 6 and the movement of the arc plate 2 2 up and down in the arc slot 6.

[0024] A fixing plate 13 is fixed to the upper and lower ends of one side of the arc-shaped plate 1, and the top of the threaded rod 14 passes through the fixing plate 13 and is threadedly connected. A threaded hole 17 is provided on the lower surface of the fixing plate 13, and the top of the threaded rod 14 passes through the threaded hole 17 and is threadedly connected. A turntable 12 is fixed to the bottom of the threaded rod 14, and the threaded hole 17 facilitates the threaded rod 14 to pass through and be threadedly connected, so that the height of the arc-shaped plate 2 can be adjusted by rotating the threaded rod 14, which is convenient for protecting coal pillars of different heights. A rotating rod 15 is fixed to the top of the threaded rod 14, and the top of the rotating rod 15 is connected to the connecting plate 1 6 is rotatably connected on the lower surface, one side of the connecting plate 16 is fixed to one side of the outer wall of the arc-shaped plate 2, the upper surface of the arc-shaped plate 2 is fixed with the arc-shaped plate 3, and the lower surface of the arc-shaped plate 3 is provided with a positioning hole 19. The top end of the positioning rod 18 passes through the positioning hole 19, and the upper and lower arc-shaped plates 3 are respectively fitted with the top and bottom ends of the self-retained lane, and then the positioning rod 18 passes through the positioning hole 19 and is inserted into the self-retained lane, so that the arc-shaped plates 1, 2 and 3 can be limited, which is convenient for protecting the coal pillar and preventing it from being hit, causing the coal pillar to break, forming a collapse and causing danger.

[0025] When it is necessary to protect the coal pillar left in the private lane of the coal mine, the coal pillar is sleeved between the two curved plates 1, and then a bolt 9 is inserted through the threaded hole 11 and threadedly connected. The bolt 9 is then inserted through the nut 10 and threadedly connected. The turntable 12 is manually rotated to rotate the threaded rod 14, and the curved plate 2 2 can be moved up and down as needed, so that the curved plates 3 3 at the upper and lower ends can respectively fit the top and bottom ends of the inner wall of the private lane. Then, the positioning rod 18 is inserted through the positioning hole 19 and inserted into the private lane, so that the curved plates 1 and 2 can protect the coal pillar. This achieves the effect of easily protecting coal pillars of different lengths and preventing the coal pillars from being hit, causing the coal pillars to break, collapse, and other dangerous situations.

[0026] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A transition bracket for a reserved lane, comprising an arc plate 1 (1), an arc plate 2 (2), a bracket body (4), a bolt (9), a threaded rod (14), a connecting plate (16) and a positioning rod (18), characterized in that: The front end of the bracket body (4) is provided with a groove (5), and the two sides of the top end of the inner wall of the groove (5) are respectively rotatably connected to the rotating shaft (7), and the two sides of the bottom end of the inner wall of the groove (5) are respectively rotatably connected to the rotating shaft (7), and the rotating shaft (7) is fixed to the arc plate one (1), and the upper and lower ends of the arc plate one (1) are respectively inserted into the arc plate two (2), and the upper and lower ends of one side of the arc plate one (1) are respectively fixed with a fixed plate (13), and the top end of the threaded rod (14) passes through the fixed plate (13) and is threadedly connected, and the top end of the threaded rod (14) is fixed with a rotating rod (15), and the top end of the rotating rod (15) is rotatably connected to the lower surface of the connecting plate (16), and one side of the connecting plate (16) is fixed to one side of the outer wall of the arc plate two (2).

2. A transition support for a reserved tunnel according to claim 1, characterized in that: The arc-shaped plate 1 (1) is provided with arc-shaped slots (6) at the upper and lower ends respectively, and the arc-shaped slots (6) are inserted into the arc-shaped plate 2 (2).

3. A transition support for a reserved tunnel according to claim 2, characterized in that: The width of the arc-shaped slot (6) formed on the arc-shaped plate 1 (1) matches the width of the arc-shaped plate 2 (2), and the arc-shaped slot (6) is vertically aligned with the center of the arc-shaped plate 2 (2).

4. A transition support for a reserved tunnel according to claim 1, characterized in that: A limiting plate (8) is fixed to the front end of the arc-shaped plate (1), a threaded hole (11) is opened on one side of the limiting plate (8), a bolt (9) passes through the threaded hole (11) and is threadedly connected, and a bolt (9) passes through a nut (10) and is threadedly connected.

5. The transition support for a reserved tunnel according to claim 1, characterized in that: The lower surface of the fixing plate (13) is provided with a second threaded hole (17), the top end of the threaded rod (14) passes through the second threaded hole (17) and is threadedly connected, and the bottom end of the threaded rod (14) is fixed with a turntable (12).

6. The transition support for a reserved tunnel according to claim 1, characterized in that: The upper surface of the arc-shaped plate 2 (2) is fixed with the arc-shaped plate 3 (3), the lower surface of the arc-shaped plate 3 (3) is provided with a positioning hole (19), and the top end of the positioning rod (18) passes through the positioning hole (19).

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