Deformable supporting device for tunnel excavation

Abstract

The utility model provides a deformable supporting device for tunnel excavation, and relates to the technical field of tunnel supporting equipment, the deformable supporting device comprises a middle supporting plate, an extension guard plate, side supporting plates and a lower fixing support, the top of the middle supporting plate is connected with the extension guard plate in a sliding mode, and the side supporting plates are arranged on the two sides of the middle supporting plate. A lower worm-wheel shaft is fixedly arranged at the bottom of the side supporting plate, the head end of the lower worm-wheel shaft is meshed with a driving worm, the tail end of the driving worm is fixedly connected with a main shaft of a driving motor, and the lower worm-wheel shaft is rotationally connected with the upper end of a lower connecting frame in the circumferential direction. After the heights of the middle supporting plate and the side supporting plates are reduced, people can stand to explore the top of the tunnel, and the middle supporting plate and the side supporting plates are attached to be close to the top of the tunnel, so that impact force generated when stones fall can be reduced; the problem that a top baffle of a supporting device is close to the top of a tunnel, and personnel cannot stand at the top of the baffle conveniently to explore the top of the tunnel is solved.

Description

Technical Field

[0001] This utility model relates to the field of tunnel support equipment technology, and in particular to a deformable support device for tunnel excavation. Background Technology

[0002] During tunnel excavation, rocks are excavated and transported out through drilling, charging, and blasting. At the same time, tunneling machines can be used to speed up the excavation process. After the tunnel excavation is completed, concrete is sprayed to support and reinforce the surrounding rock.

[0003] During tunnel excavation, support devices are installed above the tunneling or drilling and blasting equipment to provide temporary protection for personnel and equipment below. The support devices are equipped with baffles at the top to protect against falling rocks. However, the existing support devices have baffles at a fixed height. If the baffles are too close to the tunnel, it is inconvenient for personnel to stand on top of the baffles to conduct exploration work on the tunnel roof. If the baffles are too far from the tunnel, the falling rocks will fall faster and with greater impact force, and the baffles will be easily dented by the rocks. Summary of the Invention

[0004] This disclosure relates to a deformable support device for tunnel excavation. The height of the central support plate and side support plates is reduced to allow personnel to stand on top for exploration work at the tunnel top. The height of the central and side support plates is increased to fit snugly against the tunnel top, while the side support plates simultaneously tilt outwards, changing their shape. The central and side support plates effectively block the tunnel top, protecting construction personnel below. Simultaneously, the close proximity of the central and side support plates to the tunnel top reduces the impact of falling rocks, minimizing the occurrence of dents in the central and side support plates.

[0005] In a first aspect, this disclosure provides a deformable support device for tunnel excavation, specifically including a central support plate, an extension support plate, side support plates, and a lower fixed bracket. The extension support plate is slidably connected to the top of the central support plate, side support plates are provided on both sides of the central support plate, a lower fixed bracket is provided below the central support plate, and a lower connecting column is fixedly provided at the bottom of the central support plate.

[0006] In at least some embodiments, the bottom of the extended guard plate and the telescopic rod of the horizontal telescopic cylinder are fixedly connected, the horizontal telescopic cylinder of the top extended guard plate of the middle support plate is fixedly connected to the middle support plate, and the extended guard plate is positioned above the exploration personnel at the location where excavation is required.

[0007] In at least some embodiments, an extension plate is slidably provided on the upper part of the side support plate, and the horizontal telescopic cylinder of the extension plate at the top of the side support plate is fixedly connected to the side support plate. The middle support plate and the side support plate can block falling rocks from the top of the tunnel.

[0008] In at least some embodiments, a lower worm gear shaft is fixedly provided at the bottom of the side support plate, the first end of the lower worm gear shaft meshes with the drive worm, the tail end of the drive worm is fixedly connected to the main shaft of the drive motor, and the lower worm gear shaft is circumferentially rotatably connected to the upper end of the lower connecting frame.

[0009] In at least some embodiments, the drive motor and the lower connecting frame are fixedly connected. When the drive worm rotates, the side support plate rotates around the lower worm wheel shaft as the center. The lower worm wheel shaft and the side support plate synchronously change their tilt shape. The side support plate also tilts outward to adjust its angle. The middle support plate and the side support plate form a structure that is high in the middle and low on both sides. The middle support plate and the side support plate achieve a close fit to the arched top of the tunnel.

[0010] In at least some embodiments, a lower connecting slide is provided in the middle and on both sides of the lower fixed bracket, a vertical telescopic cylinder is fixedly provided on the outer side of the lower connecting slide, and a lower support gantry is fixedly provided below the lower fixed bracket.

[0011] In at least some embodiments, the lower connecting slide and the lower connecting column in the middle of the lower fixed bracket are slidably connected, the vertical telescopic cylinder telescopic rod of the lower connecting slide in the middle of the lower fixed bracket is fixedly connected to the lower connecting column, the lower connecting slides on both sides of the lower fixed bracket are slidably connected to the lower connecting frame, the vertical telescopic cylinder telescopic rod of the lower connecting slides on both sides of the lower fixed bracket is fixedly connected to the lower connecting frame, and the vertical telescopic cylinder supports the lower connecting frame and the side support plate to move down synchronously, thereby reducing the height of the side support plate.

[0012] This utility model provides a deformable support device for tunnel excavation, which has the following beneficial effects:

[0013] After the height of the central and side support plates is reduced, it is possible for people to stand on top to conduct exploration work at the top of the tunnel. The height of the central and side support plates is increased to fit against the top of the tunnel, and the side support plates are tilted outwards to change their shape. The central and side support plates block the top of the tunnel and protect the construction personnel below. At the same time, the close fit between the central and side support plates and the top of the tunnel can reduce the impact force when rocks fall and reduce the possibility of deformation and pitting of the central and side support plates.

[0014] During the pre-construction exploration, the extended support plate is moved to the front of the middle support plate to expand the protection range. The extended support plate covers the construction position in front and protects the personnel who need to explore the excavation position in front. The extended support plate is moved to the top of the middle support plate to make room for the tunneling equipment. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0016] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0017] In the attached diagram:

[0018] Figure 1 A schematic diagram of the overall structure of this application is shown;

[0019] Figure 2 A structural schematic diagram of the side support plate in the inclined state of this application is shown;

[0020] Figure 3 This invention illustrates a structural schematic diagram of the extended guard plate moving away from the middle support plate.

[0021] Figure 4 A schematic diagram of the lower fixed support structure of this application is shown;

[0022] Figure 5 A schematic diagram of the side support plate structure of this application is shown;

[0023] Figure 6 This invention presents a structural schematic diagram showing the lower connecting column and the lower connecting slide in their separated states.

[0024] List of reference numerals

[0025] 1. Middle support plate; 101. Lower connecting column;

[0026] 2. Extended guard plate; 201. Horizontal telescopic cylinder;

[0027] 3. Side support plate; 301. Lower worm gear shaft; 302. Drive worm; 303. Drive motor; 304. Lower connecting frame;

[0028] 4. Lower fixed bracket; 401. Lower connecting slide; 402. Vertical telescopic cylinder; 403. Lower supporting gantry. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] Example 1: Please refer to Figures 1 to 6 :

[0031] This utility model proposes a deformable support device for tunnel excavation, comprising: a central support plate 1, an extension support plate 2, side support plates 3, and a lower fixed bracket 4. A lower connecting column 101 is fixedly installed at the bottom of the central support plate 1. The lower fixed bracket 4 is installed below the central support plate 1. Lower connecting slides 401 are installed in the middle and on both sides of the lower fixed bracket 4. A vertical telescopic cylinder 402 is fixedly installed on the outer side of the lower connecting slide 401. A lower support gantry 403 is fixedly installed below the lower fixed bracket 4. The extension support plate 2 is slidably connected to the top of the central support plate 1. The bottom of the extension support plate 2 is fixedly connected to the telescopic rod of the horizontal telescopic cylinder 201. The horizontal telescopic cylinder 201 of the extension support plate 2 at the top of the central support plate 1 is fixedly connected to the central support plate 1. 2. Cover the construction site ahead. The extended guard plate 2 is positioned above the exploration personnel at the excavation site ahead to protect against falling rocks. Side guard plates 3 are installed on both sides of the central support plate 1. The extended guard plate 2 is slidably installed on the upper part of the side support plate 3. The horizontal telescopic cylinder 201 of the extended guard plate 2 at the top of the side support plate 3 is fixedly connected to the side support plate 3. The central support plate 1 and the side support plate 3 block falling rocks from the top of the tunnel and protect the construction personnel below. The bottom of the side support plate 3 is fixedly installed with a lower worm gear shaft 301. The first end of the lower worm gear shaft 301 meshes with the drive worm 302. The tail end of the drive worm 302 is fixedly connected to the main shaft of the drive motor 303. The lower worm gear shaft 301 and the upper end of the lower connecting frame 304 are circumferentially rotatably connected.

[0032] In this embodiment, the drive motor 303 and the lower connecting frame 304 are fixedly connected. When the drive worm 302 rotates, the side support plate 3 rotates around the lower worm gear shaft 301. The lower worm gear shaft 301 and the side support plate 3 change their tilt shape synchronously. The side support plate 3 tilts outward at the same time to adjust its angle. The middle support plate 1 and the side support plate 3 form a structure that is high in the middle and low on both sides. The middle support plate 1 and the side support plate 3 achieve fit with the arched top of the tunnel. The tilted side support plate 3 can also guide the falling rocks to slide to both sides.

[0033] In this embodiment, the lower connecting slide 401 and the lower connecting column 101 in the middle of the lower fixed bracket 4 are slidably connected. The telescopic rod of the vertical telescopic cylinder 402 of the lower connecting slide 401 in the middle of the lower fixed bracket 4 is fixedly connected to the lower connecting column 101. The lower connecting slides 401 and the lower connecting frame 304 on both sides of the lower fixed bracket 4 are slidably connected. The telescopic rod of the vertical telescopic cylinder 402 of the lower connecting slides 401 on both sides of the lower fixed bracket 4 is fixedly connected to the lower connecting frame 304. The vertical telescopic cylinder 402 supports the lower connecting frame 304 and the side support plate 3 to move down synchronously. After the height of the side support plate 3 is reduced, the side support plate 3 is offset from the middle support plate 1 after the height is reduced, so as to avoid the side support plate 3 being stuck by the middle support plate 1 and unable to continue tilting when one side of the side support plate 3 moves up and approaches the middle support plate 1.

[0034] In Example 2, based on Example 1, a motor-driven wheel hub is installed at the lower part of the lower support gantry 403 for movement. Alternatively, the lower support gantry 403 can be omitted, and the lower fixed bracket 4 is directly fixed on the gantry-shaped main frame of the integrated drilling and blasting trolley. The lower connecting slides 401 on both sides of the lower fixed bracket 4 are horizontally slidably connected and supported by the vertical telescopic cylinder 402. The side support plate 3 adjusts its distance from the middle support plate 1 as the lower connecting slides 401 move horizontally. The coverage area of ​​the side support plate 3 and the middle support plate 1 is adjusted, and the gap between the top extension plate 2 of the side support plate 3 and the middle support plate 1 is adjusted to reduce the gap.

[0035] The working principle of this embodiment is as follows: The vertical telescopic cylinder 402 shortens, supporting the lower connecting frame 304 and the lower connecting column 101 to move downwards. Simultaneously, the middle support plate 1, side support plates 3, and extension support plate 2 move downwards. After the height of the middle support plate 1 and side support plates 3 decreases, they remain horizontal, allowing personnel to stand on top of the middle support plate 1, side support plates 3, and extension support plate 2 for tunnel top exploration. The height of the middle support plate 1 and side support plates 3 is raised to conform to the curved top of the tunnel, and the drive motor 303 drives the drive worm gear 302 to rotate. The rotation drives the worm gear 302 to mesh and drive the lower worm wheel shaft 301 to rotate. The lower worm wheel shaft 301 and the side support plate 3 tilt and change shape synchronously. The side support plate 3 tilts outward at the same time to adjust its angle. The middle support plate 1 and the side support plate 3 form a structure that is high in the middle and low on both sides. The middle support plate 1 and the side support plate 3 can block falling rocks from the top of the tunnel and protect the construction personnel below. At the same time, the middle support plate 1 and the side support plate 3 are close to the top of the tunnel, which can reduce the impact force when rocks fall and reduce the possibility of deformation and pitting caused by falling rocks.

[0036] During the pre-construction exploration, the horizontal telescopic cylinder 201 extends and supports the extension guard plate 2, which moves to the front of the middle support plate 1 to expand the protection range. The extension guard plate 2 covers the construction position in front and protects the personnel who need to explore the excavation position in front. During construction, the extension guard plate 2 moves to the top of the middle support plate 1 to make room for the subsequent construction of tunneling equipment.

[0037] The following points should be noted in this article:

[0038] 1. The accompanying drawings of the embodiments disclosed herein only involve structures relevant to the embodiments disclosed herein; other structures may refer to general designs.

[0039] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0040] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A deformable support device for tunnel excavation, comprising: The central support plate (1), the extension support plate (2), the side support plate (3) and the lower fixed bracket (4) are characterized in that the top of the central support plate (1) is slidably connected to the extension support plate (2), the two sides of the central support plate (1) are provided with side support plates (3), the bottom of the side support plate (3) is fixedly provided with a lower worm gear shaft (301), the head end of the lower worm gear shaft (301) meshes with the drive worm (302), the tail end of the drive worm (302) is fixedly connected to the main shaft of the drive motor (303), and the lower worm gear shaft (301) is circumferentially rotatably connected to the upper end of the lower connecting bracket (304).

2. The deformable support device for tunnel excavation according to claim 1, characterized in that, A lower fixed bracket (4) is provided below the middle support plate (1), and a lower connecting column (101) is fixedly provided at the bottom of the middle support plate (1).

3. The deformable support device for tunnel excavation according to claim 1, characterized in that, The bottom of the extended guard plate (2) and the telescopic rod of the horizontal telescopic cylinder (201) are fixedly connected, and the horizontal telescopic cylinder (201) of the top extended guard plate (2) of the middle support plate (1) and the middle support plate (1) are fixedly connected.

4. The deformable support device for tunnel excavation according to claim 3, characterized in that, An extension guard plate (2) is slidably provided on the upper part of the side support plate (3), and the horizontal telescopic cylinder (201) of the extension guard plate (2) at the top of the side support plate (3) is fixedly connected to the side support plate (3).

5. A deformable support device for tunnel excavation according to claim 2, characterized in that, The drive motor (303) and the lower connecting frame (304) are fixedly connected. When the drive worm (302) rotates, the side support plate (3) rotates around the lower worm wheel shaft (301) as the center.

6. A deformable support device for tunnel excavation according to claim 5, characterized in that, The lower fixed bracket (4) is provided with a lower connecting slide (401) in the middle and on both sides. A vertical telescopic cylinder (402) is fixedly provided on the outer side of the lower connecting slide (401). A lower support gantry (403) is fixedly provided below the lower fixed bracket (4).

7. A deformable support device for tunnel excavation according to claim 6, characterized in that, The lower connecting slide (401) and the lower connecting column (101) in the middle of the lower fixed bracket (4) are slidably connected. The telescopic rod of the vertical telescopic cylinder (402) of the lower connecting slide (401) in the middle of the lower fixed bracket (4) is fixedly connected to the lower connecting column (101). The lower connecting slides (401) and the lower connecting frame (304) on both sides of the lower fixed bracket (4) are slidably connected. The telescopic rod of the vertical telescopic cylinder (402) of the lower connecting slides (401) on both sides of the lower fixed bracket (4) is fixedly connected to the lower connecting frame (304).

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