A temporary support device for small tunnels

Abstract

This utility model relates to the technical field of tunnel support devices, and discloses a temporary support device suitable for small tunnels, including a support frame. A second fixed plate is provided at the top of the support frame, and a second connecting plate is fixedly connected to the top of the inner wall of the second fixed plate. A movable sleeve is fixedly connected to the inner wall of the second connecting plate. A first fixed plate is provided at the top of the support frame, and a first connecting plate is fixedly connected to the top of the inner wall of the first fixed plate. A servo motor is fixedly connected to the right end of the first connecting plate, and a transmission screw is installed at the left end of the first connecting plate. When the width of the device needs to be adjusted, the servo motor starts, and its output end drives the transmission screw to rotate through the transmission mechanism inside the first connecting plate. Because there is a transmission connection between the transmission screw and the movable sleeve, the movable sleeve moves axially under the rotation of the screw, thereby driving the second connecting plate and the second fixed plate to move laterally, thus realizing the adjustment of the device width.

Description

Technical Field

[0001] This utility model relates to the technical field of tunnel support devices, and in particular to a temporary support device suitable for small tunnels. Background Technology

[0002] During the construction of small tunnels, due to the small tunnel cross-sectional dimensions, limited construction space, and poor stability of the surrounding rock, temporary support devices are required to ensure construction safety and quality. Traditional temporary support devices typically employ steel arches, wooden supports, or other fixed structural forms.

[0003] Traditional support devices typically have fixed dimensions and cannot be quickly adjusted to different tunnel cross-sections. For example, in the construction of small tunnels, the tunnel width may vary between 0.8 meters and 2.2 meters, and fixed-size support devices need to be designed and manufactured individually for each size, which not only increases material costs but also prolongs construction preparation time. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a temporary support device suitable for small tunnels.

[0005] This utility model is achieved using the following technical solution: A temporary support device suitable for small tunnels includes a support frame. A second fixed plate is provided at the top of the support frame. A second connecting plate is fixedly connected to the top of the inner wall of the second fixed plate. A movable sleeve is fixedly connected to the inner wall of the second connecting plate. A first fixed plate is provided at the top of the support frame. A first connecting plate is fixedly connected to the top of the inner wall of the first fixed plate. A servo motor is fixedly connected to the right end of the first connecting plate. A transmission screw is installed at the left end of the first connecting plate. The output end of the left end of the servo motor is connected to the right end of the transmission screw through the inside of the first connecting plate. The surface of the transmission screw is connected to the inner wall of the movable sleeve. A limit ring is fixedly connected to the left end of the transmission screw.

[0006] Through the above technical solution, the servo motor provides power for the width adjustment of the device. Its precise control performance ensures the accuracy of the rotational speed and angle of the transmission screw. The transmission screw is connected to the servo motor, converting the motor's rotational motion into the linear motion of the moving sleeve. Through the transmission connection between the screw and the moving sleeve, a large range of lateral movement can be achieved to meet the adjustment needs of different small tunnel widths. At the same time, the screw drive has self-locking properties, maintaining the position of the moving sleeve after the servo motor stops working, ensuring the stability of the device width. The transmission connection between the inner wall of the moving sleeve and the surface of the transmission screw ensures the smoothness and reliability of the movement, making the width adjustment process smooth and without jamming. The limit ring can limit the axial movement range of the transmission screw, preventing it from excessively extending or falling off during operation.

[0007] As a further improvement to the above solution, two support frames are provided, and four connecting columns are fixedly connected to the bottom ends of the two support frames. Four self-locking casters are fixedly connected to the bottom ends of the four connecting columns.

[0008] The above technical solution uses four self-locking casters to push the entire device to the designated position. Once in position, stepping on the self-locking pedal locks the wheels, preventing slippage.

[0009] As a further improvement to the above solution, hydraulic rods are fixedly connected to the top of the two support frames. There are four hydraulic rods, and support plates are fixedly connected to the top of the four hydraulic rods. There are two support plates. The top of one of the two support plates is fixedly connected to the bottom of a fixed plate, and the top of the other support plate is fixedly connected to the bottom of a fixed plate.

[0010] The above technical solution involves installing a hydraulic rod at the top of the support frame to adjust the height of the device. Controlled by the hydraulic system, the hydraulic rod can extend and retract, thereby moving the support plate up and down. This allows the device to adapt to different tunnel top heights, providing stable support for the tunnel. The hydraulic rod has a large load-bearing capacity and good stability, capable of withstanding the pressure of the surrounding rock in the tunnel, ensuring the safety and reliability of the support device during construction.

[0011] As a further improvement to the above solution, a connecting plate is fixedly connected to the top of the first fixing plate, and a connecting plate is fixedly connected to the top of the second fixing plate. There are two connecting plates, and an elastic protective net is fixedly connected to the top of the two connecting plates.

[0012] Through the above technical solution, the elastic protective net is installed on the top of the connecting plate to form a protective barrier. During construction, the elastic protective net can prevent falling rocks, debris, and other objects from the tunnel ceiling from injuring construction workers, thus playing a safety protection role, ensuring the personal safety of construction workers, and reducing construction risks.

[0013] As a further improvement to the above solution, a movable plate is fixedly connected to the right end of the second fixed plate, and a movable groove is opened at the left end of the first fixed plate. The surface of the movable plate is slidably connected to the inner wall of the movable groove. A threaded groove is opened at the front end of the first fixed plate. There are four threaded grooves. A limit bolt is installed at the front end of the first fixed plate. The limit bolt is threadedly connected to the inner wall of one of the four threaded grooves.

[0014] With the above technical solution, the movable plate is fixed to the right end of the second fixed plate and slidably connected to the movable groove at the left end of the first fixed plate. This design allows the movable plate to slide smoothly within the movable groove during the lateral movement of the second fixed plate, ensuring the smoothness of the width adjustment process. It also helps to limit the direction of movement of the second fixed plate, improving the structural stability of the device. The limiting bolts further lock the position of the second fixed plate after the device width is adjusted to the correct position, preventing accidental movement of the second fixed plate due to external forces or other factors, thus ensuring the stability of the device during operation.

[0015] As a further improvement to the above solution, a placement box is fixedly connected to the right end of the inner wall of the second fixing plate.

[0016] The above technical solution, with the storage box fixed to the right end of the inner wall of the second fixing plate, provides a convenient tool storage space for construction workers. It can hold measuring tools, small repair tools, notebooks, and other items, allowing construction workers to easily access them, improving work efficiency, and also avoiding the risk of tool loss in complex construction environments, thus ensuring the smooth progress of construction.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This utility model uses a servo motor to drive the transmission screw to rotate, which in turn causes the moving sleeve and the fixed plate to slide laterally. This allows for flexible adjustment of the device's width to adapt to tunnel cross-sections of different sizes, thus improving the device's versatility and adaptability.

[0019] This invention uses four hydraulic rods to adjust the height of the device, allowing it to better fit the top of the tunnel and ensure the stability of the support. The four hydraulic rods also allow for quick height adjustment, thereby increasing the practicality of the device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the left end structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the bottom structure of this utility model;

[0023] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0024] Explanation of key symbols:

[0025] 1. Support frame; 2. Connecting column; 3. Self-locking caster wheel; 4. Hydraulic rod; 5. Support plate; 6. Fixing plate one; 7. Fixing plate two; 8. Connecting plate; 9. Elastic protective net; 10. Movable plate; 11. Movable groove; 12. Connecting plate one; 13. Connecting plate two; 14. Servo motor; 15. Transmission screw; 16. Moving sleeve; 17. Limiting ring; 18. Threaded groove; 19. Limiting bolt; 20. Placement box. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] Example:

[0028] Please combine Figure 1-4 This embodiment provides a temporary support device suitable for small tunnels, including a support frame 1. A second fixed plate 7 is provided at the top of the support frame 1. A second connecting plate 13 is fixedly connected to the top of the inner wall of the second fixed plate 7. A movable sleeve 16 is fixedly connected to the inner wall of the second connecting plate 13. A first fixed plate 6 is provided at the top of the support frame 1. A first connecting plate 12 is fixedly connected to the top of the inner wall of the first fixed plate 6. A servo motor 14 is fixedly connected to the right end of the first connecting plate 12. A transmission screw 15 is installed at the left end of the first connecting plate 12. The output end of the left end of the servo motor 14 is connected to the right end of the transmission screw 15 through the inside of the first connecting plate 12. The surface of the transmission screw 15 is connected to the inner wall of the movable sleeve 16. A limit ring 17 is fixedly connected to the left end of the transmission screw 15.

[0029] There are two support frames 1. The bottom of the two support frames 1 is fixedly connected to the connecting column 2. There are four connecting columns 2. The bottom of the four connecting columns 2 is fixedly connected to the self-locking caster wheel 3. There are four self-locking caster wheels 3.

[0030] Two support frames 1 are fixedly connected to the top of hydraulic rods 4. There are four hydraulic rods 4. The top of the four hydraulic rods 4 are fixedly connected to support plates 5. There are two support plates 5.

[0031] The top end of one of the two support plates 5 is fixedly connected to the bottom end of the first fixed plate 6, and the top end of the other support plate 5 is fixedly connected to the bottom end of the second fixed plate 7.

[0032] Fixed plate 6 has a connecting plate 8 fixedly connected to its top end, and fixed plate 7 has a connecting plate 8 fixedly connected to its top end. There are two connecting plates 8, and elastic protective nets 9 are fixedly connected to the top ends of the two connecting plates 8.

[0033] A movable plate 10 is fixedly connected to the right end of the fixed plate 2 7, and a movable groove 11 is opened on the left end of the fixed plate 1 6. The surface of the movable plate 10 is slidably connected to the inner wall of the movable groove 11.

[0034] The front end of the fixing plate 6 has a threaded groove 18, and there are four threaded grooves 18. A limit bolt 19 is installed at the front end of the fixing plate 6, and the limit bolt 19 is threadedly connected to the inner wall of one of the four threaded grooves 18.

[0035] A placement box 20 is fixedly connected to the right end of the inner wall of the fixed plate 27.

[0036] The implementation principle of a temporary support device suitable for small tunnels in this embodiment is as follows: When the width of the device needs to be adjusted, the servo motor 14 starts, and its output end drives the transmission screw 15 to rotate through the transmission mechanism inside the connecting plate 8. Since there is a transmission connection between the transmission screw 15 and the movable sleeve 16, the movable sleeve 16 will move along its axial direction under the rotation of the screw, thereby driving the connecting plate 8 and the fixed plate 7 to move laterally, thus realizing the adjustment of the device width. When the device width is adjusted to a suitable position, the servo motor 14 stops working and is limited by the limit bolt 19 to ensure that the device remains stable during operation and will not change in width due to external forces. When the height of the device needs to be adjusted, the four hydraulic rods 4 work simultaneously. When the top of the tunnel needs support, the hydraulic rods 4 extend, pushing the support plate 5 upward until the support plate 5 is tightly attached to the top of the tunnel, providing stable support for the tunnel. Conversely, when it is necessary to lower the device height or dismantle it, the hydraulic rod 4 retracts, causing the support plate 5 to move downwards, thereby achieving flexible adjustment of the device height. The storage box 20 is fixed to the right end of the inner wall of the fixing plate 7, providing workers with convenient tool storage space. During tunnel construction, workers can place measuring tools, small maintenance tools, notebooks, and other items in the storage box 20 for easy access, improving work efficiency and avoiding the risk of tool loss in complex construction environments.

[0037] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A temporary support device suitable for small tunnels, characterized in that, The system includes a support frame (1), a fixed plate 2 (7) at the top of the support frame (1), a connecting plate 2 (13) fixedly connected to the top of the inner wall of the fixed plate 2 (7), a movable sleeve (16) fixedly connected to the inner wall of the connecting plate 2 (13), a fixed plate 1 (6) at the top of the support frame (1), a connecting plate 1 (12) fixedly connected to the top of the inner wall of the fixed plate 1 (6), a servo motor (14) fixedly connected to the right end of the connecting plate 1 (12), a transmission screw (15) installed on the left end of the connecting plate 1 (12), the output end of the left end of the servo motor (14) being connected to the right end of the transmission screw (15) through the inside of the connecting plate 1 (12), the surface of the transmission screw (15) being connected to the inner wall of the movable sleeve (16), and a limit ring (17) fixedly connected to the left end of the transmission screw (15).

2. A temporary support device for small tunnels according to claim 1, characterized in that: There are two support frames (1), and the bottom ends of the two support frames (1) are fixedly connected to connecting columns (2). There are four connecting columns (2), and the bottom ends of the four connecting columns (2) are fixedly connected to self-locking casters (3). There are four self-locking casters (3).

3. A temporary support system for small tunnels as claimed in claim 1, wherein: Two hydraulic rods (4) are fixedly connected to the top of the two support frames (1). There are four hydraulic rods (4). The top of the four hydraulic rods (4) are fixedly connected to two support plates (5).

4. A temporary support system for small tunnels as claimed in claim 3, wherein: The top end of one of the two support plates (5) is fixedly connected to the bottom end of the first fixing plate (6), and the top end of the other support plate (5) is fixedly connected to the bottom end of the second fixing plate (7).

5. A temporary support system for small tunnels as claimed in claim 4, characterised in that: The top of the first fixing plate (6) is fixedly connected to a connecting plate (8), and the top of the second fixing plate (7) is fixedly connected to a connecting plate (8). There are two connecting plates (8), and the tops of the two connecting plates (8) are fixedly connected to an elastic protective net (9).

6. A temporary support system for small tunnels as claimed in claim 5, characterised in that: The right end of the fixed plate 2 (7) is fixedly connected to the movable plate (10), and the left end of the fixed plate 1 (6) is provided with a movable groove (11). The surface of the movable plate (10) is slidably connected to the inner wall of the movable groove (11).

7. A temporary support system for small tunnels as claimed in claim 5, wherein: The front end of the fixing plate (6) is provided with a threaded groove (18), and there are four threaded grooves (18). A limit bolt (19) is installed at the front end of the fixing plate (6), and the limit bolt (19) is threadedly connected to the inner wall of one of the four threaded grooves (18).

8. A temporary support system for small tunnels as claimed in claim 6, wherein: A placement box (20) is fixedly connected to the right end of the inner wall of the second fixing plate (7).

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