Auxiliary supporting device for synchronous withdrawing of double roadways

Abstract

The utility model relates to the technical field of roadways, and discloses an auxiliary supporting device for synchronous withdrawing of double roadways. The auxiliary supporting device for synchronous withdrawing of the double roadways comprises a limiting plate, a connecting shaft is installed at the left end of the limiting plate in a penetrating mode, a supporting rod is installed in the center of the connecting shaft in a penetrating mode, a connecting block is installed in the supporting rod in an embedded mode, and a supporting piston is fixedly installed at the upper end of the connecting block; the connecting bolts penetrate through the hooks to be connected with the supporting rods, the positions of the mounting holes in the front side and the rear side of the limiting frame are matched with the positions of the hooks, the distance between the hooks between the limiting rods on the front side and the rear side can be adjusted in a sliding mode when the limiting frame is hung, and the positions of the hooks are limited through the connecting bolts after hanging is completed to fix the position of the limiting frame. In this way, after the hydraulic structures on the two sides are installed, the position between the hooks can be finely adjusted within a certain range, so that the limiting frame and the metal net are hung above the hooks.

Description

Technical Field

[0001] This utility model relates to the field of tunnel technology, specifically to an auxiliary support device for synchronous retraction of two tunnels. Background Technology

[0002] Tunnel support systems are essential equipment used in underground engineering projects such as coal mines to support and protect the roof of tunnels. They are primarily used to prevent roof collapse caused by geological conditions or stress generated during tunneling, ensuring the safe use of the tunnel. These systems typically include components such as anchor bolts, supports, and safety netting.

[0003] A relevant reference is Chinese utility model patent CN207363683U, which discloses a roadway support device, including a top support bracket, a working face side support bracket, and a coal pillar side support bracket. The working face side support bracket and the coal pillar side support bracket are respectively fixedly connected below the top support bracket. In the downward direction, the working face side support bracket and the coal pillar side support bracket extend inclined in directions away from each other. Multiple pressure-relief pads that can deform under pressure are detachably provided on the outer surfaces of the working face side support bracket and the coal pillar side support bracket. By setting flexible pressure-relief pads, when the coal pillar pressure is concentrated, the pressure-relief pads can deform, providing a space and buffer zone for the coal pillar stress, thus weakening the stress in the coal pillar. If necessary, the pressure-relief pads can be removed to increase the buffer space, further weaken the coal pillar stress, reduce the concentrated stress borne by the support device, and improve the support effect.

[0004] Currently, conventional support devices typically use hydraulic structures located on both sides of the roadway to support the roadway roof. A metal mesh is then suspended between these hydraulic structures to enhance the support effect. During installation, the elongation of the hydraulic structures on both sides needs to be adjusted to ensure they maintain contact with the roadway roof and floor for support. However, existing support devices cannot simultaneously adjust the elongation of the hydraulic structures on both sides, requiring fine-tuning, which is inconvenient. Furthermore, after the support structures are installed, suspending the metal mesh is cumbersome because the position of the support structures cannot be adjusted. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides an auxiliary support device for synchronous retraction of dual-lane tunnels, which has advantages such as easy synchronous adjustment of the height of the support structures on both sides and easy installation of metal mesh, thus solving the aforementioned technical problems.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: an auxiliary support device for synchronous retreat of two tunnels, comprising: a limiting plate, a connecting shaft inserted into the left end of the limiting plate, a support rod inserted into the center of the connecting shaft, a connecting block fitted inside the support rod, a support piston fixedly installed at the upper end of the connecting block, a synchronous shaft inserted into the right end of the limiting plate, a limiting rod inserted above the synchronous shaft, a limiting post fixedly installed on one side of the limiting rod, a hook inserted into the outer side of the limiting post, a connecting bolt inserted below the hook, a limiting frame suspended above the hook, mounting holes provided on the front and rear sides of the limiting frame, and a metal mesh fixedly installed inside the limiting frame; the synchronous shaft facilitates the synchronous rotation of the limiting plates on the front and rear sides.

[0009] As a preferred embodiment of this utility model, the limiting plate is symmetrically installed at the front and rear ends of the connecting shaft with the center of the connecting shaft as the reference, and the connecting shaft and the limiting plate form a fixed connection; the connecting shaft facilitates the rotation of the support rod.

[0010] As a preferred embodiment of this utility model, the left end of the support rod is provided with an opening structure that fits into the connecting shaft. The support rod is inserted and installed at the center of the connecting shaft. The support rod is rotatably connected to the limiting plate through the connecting shaft. The bottom end of the support rod contacts the bottom surface of the tunnel to provide support.

[0011] As a preferred embodiment of this utility model, the lower left side and upper right side of the limiting plate are provided with opening structures that fit into the connecting block. The connecting block and the limiting plate are rotatably connected, and the connecting block is rotatably connected to the support rod and the limiting rod. The limiting plate can restrict the relative position between the support rod and the limiting rod.

[0012] As a preferred technical solution of this utility model, the supporting piston is movably installed on the upper and lower sides of the limiting plate through connecting blocks. The connecting blocks are installed symmetrically at the upper and lower ends of the supporting piston with the center of the supporting piston as the reference. The connecting blocks facilitate the rotation of the supporting piston.

[0013] As a preferred embodiment of this utility model, the top end of the supporting piston above the limiting plate is rotatably connected to the limiting rod via a connecting block, and the lower end of the supporting piston below the limiting plate is rotatably connected to the supporting rod via a connecting block; the supporting piston can adjust the included angle between the limiting plate and the supporting rod, and between the limiting rod and the limiting rod.

[0014] As a preferred embodiment of this utility model, the limiting rod is rotatably connected to the right end of the limiting plate via a synchronous shaft, the hook is slidably connected to the limiting post, and the connecting bolt passes through the hook and connects it to the support rod; the connecting bolt can adjust the position of the hook.

[0015] Compared with the prior art, this utility model provides an auxiliary support device for simultaneous withdrawal of two tunnels, which has the following beneficial effects:

[0016] 1. This utility model, through the setting of a synchronous shaft, has two limiting plates symmetrically installed at the front and rear ends of the synchronous shaft, forming a fixed connection between the limiting plates and the synchronous shaft. The limiting rod is rotatably connected to the right end of the limiting plate through the synchronous shaft. The supporting piston is movably installed on the upper and lower sides of the limiting plate through connecting blocks. The connecting blocks are mirror-symmetrically installed at the upper and lower ends of the supporting piston with the center of the supporting piston as the reference. The top end of the supporting piston above the limiting plate is rotatably connected to the limiting rod through the connecting block, and the lower end of the supporting piston below the limiting plate is rotatably connected to the supporting rod through the connecting block. By extending the supporting piston, the angle between the limiting plate and the supporting rod is adjusted, allowing the support device to unfold and its height to change, so that the upper limiting rod can contact the top surface of the roadway, thereby providing support for the top surface of the roadway. Since the synchronous shaft is fixedly connected to the limiting plates at both ends, the limiting plates on both sides change angles simultaneously under the restriction of the synchronous shaft, so that the height of the limiting rods on both sides can change synchronously, thus eliminating the need for fine-tuning operations on the hydraulic structures on both sides, facilitating installation.

[0017] 2. This utility model uses limiting posts, which are equidistantly installed on the left and right sides in front of the rear limiting rod and behind the front limiting rod. The hook and the limiting post form a sliding connection. The connecting bolt passes through the hook and connects it to the support rod. The positions of the mounting holes on the front and rear sides of the limiting frame match the positions of the hooks. When suspending the limiting frame, the distance between the hooks between the front and rear limiting rods can be adjusted by sliding. After suspension, the position of the hooks is fixed by the connecting bolts. This method allows the position between the hooks to be finely adjusted within a certain range after the hydraulic structure on both sides is installed, so that the limiting frame and the metal mesh can be suspended above the hooks. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the installation structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of this utility model;

[0022] The components are: 1. Limiting plate; 11. Connecting shaft; 12. Support rod; 13. Connecting block; 14. Support piston; 15. Synchronous shaft; 16. Limiting rod; 17. Limiting post; 18. Hook; 19. Connecting bolt; 110. Limiting frame; 111. Mounting hole; 112. Metal mesh. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0024] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Please see Figure 1 - Figure 4In this embodiment, an auxiliary support device for synchronous retreat of two tunnels includes: a limiting plate 1, a connecting shaft 11 inserted at the left end of the limiting plate 1, a support rod 12 inserted at the center of the connecting shaft 11, a connecting block 13 fitted inside the support rod 12, a support piston 14 fixedly installed at the upper end of the connecting block 13, a synchronous shaft 15 inserted at the right end of the limiting plate 1, a limiting rod 16 inserted above the synchronous shaft 15, a limiting post 17 fixedly installed on one side of the limiting rod 16, a hook 18 inserted outside the limiting post 17, a connecting bolt 19 inserted below the hook 18, a limiting frame 110 suspended above the hook 18, mounting holes 111 provided on the front and rear sides of the limiting frame 110, and a metal mesh 112 fixedly installed inside the limiting frame 110.

[0027] The limiting plate 1 is symmetrically installed at the front and rear ends of the connecting shaft 11 with the center of the connecting shaft 11 as the reference, and the connecting shaft 11 and the limiting plate 1 form a fixed connection.

[0028] The left end of the support rod 12 is provided with an opening structure that fits into the connecting shaft 11. The support rod 12 is inserted and installed in the center of the connecting shaft 11. The support rod 12 is rotatably connected to the limiting plate 1 through the connecting shaft 11.

[0029] The lower left side and upper right side of the limiting plate 1 are provided with opening structures that fit into the connecting block 13. The connecting block 13 and the limiting plate 1 are rotatably connected, and the connecting block 13 is rotatably connected to the support rod 12 and the limiting rod 16.

[0030] The support piston 14 is movably mounted on the upper and lower sides of the limiting plate 1 via the connecting block 13. The connecting block 13 is mounted symmetrically at the upper and lower ends of the support piston 14 with the center of the support piston 14 as the reference.

[0031] The top end of the piston 14 above the limiting plate 1 is rotatably connected to the limiting rod 16 through the connecting block 13, and the lower end of the piston 14 below the limiting plate 1 is rotatably connected to the support rod 12 through the connecting block 13.

[0032] The limiting rod 16 is rotatably connected to the right end of the limiting plate 1 via the synchronous shaft 15, and the hook 18 is slidably connected to the limiting post 17. The connecting bolt 19 passes through the hook 18 and connects to the support rod 12.

[0033] Specifically, the limiting plate 1 can limit the relative position between the support rod 12 and the limiting rod 16, the connecting shaft 11 can facilitate the rotation of the support rod 12, the bottom end of the support rod 12 can provide support by contacting the bottom surface of the roadway, the connecting block 13 can facilitate the rotation of the support piston 14, the support piston 14 can adjust the included angle between the limiting plate 1 and the support rod 12 and the limiting rod 16, the synchronous shaft 15 can facilitate the synchronous rotation of the limiting plates 1 on both the front and rear sides, the limiting rod 16 can provide support for the top surface of the roadway, the limiting post 17 can limit the movement direction of the hook 18, the hook 18 can change the position of the suspension limiting frame 110, the connecting bolt 19 can adjust the position of the hook 18, the limiting frame 110 can limit the position of the metal mesh 112, the mounting hole 111 can facilitate the suspension of the limiting frame 110 above the hook 18, and the metal mesh 112 can provide protection.

[0034] In use, two limiting plates 1 are symmetrically installed at the front and rear ends of the synchronous shaft 15, forming a fixed connection between the limiting plates 1 and the synchronous shaft 15. The limiting rod 16 is rotatably connected to the right end of the limiting plate 1 via the synchronous shaft 15. The support piston 14 is movably installed on the upper and lower sides of the limiting plate 1 via connecting blocks 13. The connecting blocks 13 are symmetrically installed at the upper and lower ends of the support piston 14 with the center of the support piston 14 as the reference. The top end of the support piston 14 above the limiting plate 1 is rotatably connected to the limiting rod 16 via the connecting blocks 13. The lower end of the support piston 14 below the limiting plate 1 is rotatably connected to the support rod 12 via the connecting blocks 13. By extending the support piston 14, the angle between the limiting plate 1, the support rod 12, and the limiting rod 16 is adjusted, causing the support device to unfold and its height to change, so that the upper limiting rod 16 can contact the top surface of the roadway, thereby providing support for the top surface of the roadway. Since the synchronous shaft 15 is fixedly connected to the limiting plates 1 at the front and rear ends, the limiting rod 16 is rotatably connected to the limiting plates 1 at the front and rear ends. This allows the front and rear limit plates 1 to change angles simultaneously under the constraint of the synchronous shaft 15, thereby enabling the height of the front and rear limit rods 16 to change synchronously. This eliminates the need for fine-tuning the hydraulic structures on both sides, facilitating installation. The limit posts 17 are installed equidistantly in front of the rear limit rod 16 and behind the front limit rod 16. The hooks 18 and limit posts 17 form a sliding connection. The connecting bolts 19 pass through the hooks 18 and connect them to the support rods 12. The positions of the mounting holes 111 on the front and rear sides of the limit frame 110 match the positions of the hooks 18. When suspending the limit frame 110, the distance between the hooks 18 and the front and rear limit rods 16 can be adjusted by sliding. After suspension, the position of the hooks 18 is fixed by the connecting bolts 19. This method allows for fine-tuning of the position between the hooks 18 within a certain range after the hydraulic structures on both sides are installed, so that the limit frame 110, along with the metal mesh 112, can be suspended above the hooks 18.

[0035] 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. An auxiliary support device for simultaneous retraction of two tunnels, characterized in that, include: A limiting plate (1) is provided, with a connecting shaft (11) inserted at its left end. A support rod (12) is inserted at the center of the connecting shaft (11). A connecting block (13) is fitted inside the support rod (12). A support piston (14) is fixedly installed at the upper end of the connecting block (13). A synchronous shaft (15) is inserted at the right end of the limiting plate (1). A limiting rod (14) is inserted above the synchronous shaft (15). 6) A limiting post (17) is fixedly installed on one side of the limiting rod (16). A hook (18) is inserted through the outside of the limiting post (17). A connecting bolt (19) is inserted through the bottom of the hook (18). A limiting frame (110) is suspended above the hook (18). Mounting holes (111) are provided on the front and rear sides of the limiting frame (110). A metal mesh (112) is fixedly installed inside the limiting frame (110).

2. The auxiliary support device for synchronous withdrawal of two tunnels according to claim 1, characterized in that: The limiting plate (1) is symmetrically installed at the front and rear ends of the connecting shaft (11) with the center of the connecting shaft (11) as the reference, and the connecting shaft (11) and the limiting plate (1) form a fixed connection.

3. The auxiliary support device for synchronous withdrawal of two tunnels according to claim 1, characterized in that: The left end of the support rod (12) is provided with an opening structure that fits into the connecting shaft (11). The support rod (12) is inserted and installed in the center of the connecting shaft (11). The support rod (12) is rotatably connected to the limiting plate (1) through the connecting shaft (11).

4. The auxiliary support device for synchronous withdrawal of two tunnels according to claim 1, characterized in that: The lower left side and upper right side of the limiting plate (1) are provided with opening structures that fit into the connecting block (13). The connecting block (13) and the limiting plate (1) are rotatably connected. The connecting block (13) is rotatably connected to the support rod (12) and the limiting rod (16).

5. The auxiliary support device for synchronous withdrawal of two tunnels according to claim 1, characterized in that: The supporting piston (14) is movably installed on the upper and lower sides of the limiting plate (1) via the connecting block (13). The connecting block (13) is installed symmetrically at the upper and lower ends of the supporting piston (14) with the center of the supporting piston (14) as the reference.

6. The auxiliary support device for synchronous withdrawal of two tunnels according to claim 1, characterized in that: The top end of the piston (14) above the limiting plate (1) is rotatably connected to the limiting rod (16) through the connecting block (13), and the lower end of the piston (14) below the limiting plate (1) is rotatably connected to the supporting rod (12) through the connecting block (13).

7. The auxiliary support device for simultaneous withdrawal of two tunnels according to claim 1, characterized in that: The limiting rod (16) is rotatably connected to the right end of the limiting plate (1) via the synchronous shaft (15), the hook (18) is slidably connected to the limiting post (17), and the connecting bolt (19) passes through the hook (18) and connects to the support rod (12).

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