Intelligent hydraulic walking equipment for fixing large-span tunnel secondary lining steel bars

Abstract

The invention relates to intelligent hydraulic walking equipment for fixing large-span tunnel second lining steel bars, and belongs to the technical field of tunnel construction devices.The intelligent hydraulic walking equipment comprises a mounting frame, a first walking frame and a second walking frame, and the first walking frame and the second walking frame are mounted on the lower side of the mounting frame; a second hydraulic cylinder is arranged on the lower side of the second walking frame; a guide groove is formed in the bottom of the mounting frame, a rotatable two-way screw rod is arranged in the guide groove in the length direction of the guide groove, a forward thread part and a reverse thread part are arranged on the two-way screw rod, and when the two-way screw rod rotates, the first sliding block and the second sliding block drive the first walking frame and the second walking frame to be close to each other or away from each other; by means of the thread transmission principle of the two-way lead screw and the sliding block and in combination with the supporting and driving functions of the hydraulic cylinder, automatic adjustment of the distance between the walking frames and stable walking are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel construction equipment, and in particular relates to an intelligent hydraulic walking device for fixing secondary lining steel bars of a large-span tunnel. Background Art

[0002] During the tunnel excavation process, as the excavation progresses, in order to ensure convenient operation, a support frame needs to be set up in the tunnel to facilitate the excavation operation. The common practice now is to manually set up an excavation work platform in the excavation part of the tunnel so that workers can stand on the platform and perform manual operations such as drilling holes and placing explosives in the tunnel. As the tunnel excavation continues to move forward, the work platform will also move forward.

[0003] For example, the utility model patent with patent authorization announcement number: CN217440036U discloses an autonomously movable tunnel construction platform, including a first working platform and a second working platform, the tops of the first working platform and the second working platform are slidably connected by a guide rail device, and two moving devices are arranged at the bottoms of the first working platform and the second working platform, the moving devices include a hydraulic jacking device, a first walking body connected to the first working platform, and a second walking body connected to the second working platform, the first walking body and the second walking body are slidably connected, a first screw is arranged on the first walking body, and a second screw is arranged on the second walking body, the first screw and the second screw are arranged opposite to each other and mesh with each other, and hydraulic jacking devices are arranged at the bottoms of the first walking body and the second walking body.

[0004] Based on the search of the above patent authorization announcement number and the shortcomings found therein:

[0005] The walking equipment in the prior art relies heavily on manual operation. However, in tunnel construction sites with complex environments, manual operation is unstable and detrimental to the safety of construction workers. Summary of the invention

[0006] In order to solve the problem that the existing walking equipment relies heavily on manual operation, but in tunnel construction sites with complex environments, manual operation is unstable and is not conducive to the safety of construction workers, the present invention provides an intelligent hydraulic walking equipment for fixing the secondary lining steel bars of large-span tunnels.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] An intelligent hydraulic walking device for fixing the second lining steel bars of a large-span tunnel comprises a mounting frame and a first walking frame and a second walking frame mounted on the lower side of the mounting frame, a first hydraulic cylinder is arranged on the lower side of the first walking frame on the lower side of the mounting frame, and a second hydraulic cylinder is arranged on the lower side of the second walking frame; a guide groove is provided at the bottom of the mounting frame, a rotatable bidirectional screw rod is arranged in the guide groove along its length direction, a forward threaded portion and a reverse threaded portion are respectively provided on the bidirectional screw rod, a first slider is screwed on the forward threaded portion, the first slider is fixed to the first walking frame, a second slider is screwed on the reverse threaded portion, and the second slider is fixed to the second walking frame, when the bidirectional screw rod rotates, the first slider and the second slider drive the first walking frame and the second walking frame to approach or move away from each other.

[0009] As a preferred technical solution of the present invention, a control box is provided on the mounting frame, and the control box has a built-in drive motor that is transmission-connected to the bidirectional screw rod. The control box is provided with a switch operating member that is electrically connected to the drive motor, and the switch operating member is used to control the drive motor to start or stop working.

[0010] As a preferred technical solution of the present invention, the bottom side of the mounting frame is respectively provided with a first limit block and a second limit block, the first limit block is installed at the extreme position of the first walking frame away from the second walking frame, and when the first walking frame is away from the second walking frame to the extreme position, it abuts against the first limit block for limiting position, and the second limit block is installed at the extreme position of the second walking frame away from the first walking frame, and when the second walking frame is away from the first walking frame to the extreme position, it abuts against the second limit block for limiting position.

[0011] As a preferred technical solution of the present invention, a first reversal trigger structure is provided on the side of the first walking frame facing the first limit block, and a first reversal response structure is provided on the side of the first limit block facing the first walking frame. The first reversal response structure is electrically connected to the drive motor. When the first walking frame abuts against the first limit block for limit, the first reversal response structure is connected to the first reversal trigger structure and sends a reversal signal to the drive motor to change the power direction of the drive motor.

[0012] As a preferred technical solution of the present invention, a first cylinder retraction response structure is further provided on the side of the first walking frame facing the first limit block, and a first cylinder retraction trigger structure is further provided on the side of the first limit block facing the first walking frame. The first cylinder retraction response structure is electrically connected to the first hydraulic cylinder. When the first walking frame abuts against the first limit block for limiting the position, the first cylinder retraction response structure is connected to the first cylinder retraction trigger structure and sends a contraction signal to the first hydraulic cylinder to retract the telescopic end of the first hydraulic cylinder.

[0013] As a preferred technical solution of the present invention, a first extension cylinder response structure is provided on the side of the second walking frame facing the second limit block, and a first extension cylinder trigger structure is provided on the side of the second limit block facing the second walking frame. The first extension cylinder response structure is electrically connected to the second hydraulic cylinder. When the second walking frame abuts against the second limit block for limiting, the first extension cylinder response structure is connected to the first extension cylinder trigger structure and sends an extension signal to the second hydraulic cylinder to extend the telescopic end of the second hydraulic cylinder.

[0014] As a preferred technical solution of the present invention, a third limit block is provided on the bottom side of the mounting frame, and the third limit block is installed at the extreme position where the first walking frame and the second walking frame are close to each other. When the first walking frame and the second walking frame are close to each other to the extreme position, the two sides of the third limit block are respectively abutted against the first walking frame and the second walking frame for limiting position.

[0015] As a preferred technical solution of the present invention, a second reversal trigger structure is provided on the side of the first walking frame facing the third limit block, and a second reversal response structure is provided on the side of the third limit block facing the first walking frame. The second reversal response structure is electrically connected to the drive motor. When the first walking frame abuts against the third limit block for limit, the second reversal response structure is connected to the second reversal trigger structure and sends a reversal signal to the drive motor to change the power direction of the drive motor.

[0016] As a preferred technical solution of the present invention, a second extension cylinder response structure is provided on the side of the first walking frame facing the third limit block, and a second extension cylinder trigger structure is provided on the side of the third limit block facing the first walking frame. The second extension cylinder response structure is electrically connected to the first hydraulic cylinder. When the first walking frame abuts against the third limit block for limiting, the second extension cylinder response structure is connected to the second extension cylinder trigger structure and sends an extension signal to the first hydraulic cylinder to extend the telescopic end of the second hydraulic cylinder.

[0017] As a preferred technical solution of the present invention, a second cylinder retraction response structure is provided on the side of the second walking frame facing the third limit block, and a second cylinder retraction trigger structure is also provided on the side of the third limit block facing the second walking frame. The second cylinder retraction response structure is electrically connected to the second hydraulic cylinder. When the second walking frame abuts against the third limit block for limiting the position, the second cylinder retraction response structure is connected to the second cylinder retraction trigger structure and sends a contraction signal to the second hydraulic cylinder to retract the telescopic end of the second hydraulic cylinder.

[0018] The beneficial effects of the present invention are:

[0019] This solution ensures the smoothness and stability of the equipment during walking through the synchronous movement of the bidirectional lead screw and the dynamic adjustment of the hydraulic cylinder. The adjustment mechanism of the first hydraulic cylinder and the second hydraulic cylinder enables the equipment to adapt to different terrain conditions and walking requirements, thereby improving the flexibility and adaptability of the equipment. By integrating the synchronous movement of the bidirectional lead screw, the dynamic adjustment of the first hydraulic cylinder and the second hydraulic cylinder and their triggering mechanism, the operation process is simplified and the degree of automation is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a structural schematic diagram of an intelligent hydraulic walking device for fixing the secondary lining steel bars of a large-span tunnel according to the present invention;

[0022] Figure 2 This is a schematic diagram of the first state structure of an intelligent hydraulic walking device for fixing the secondary lining steel bars of a large-span tunnel according to the present invention;

[0023] Figure 3 This is a schematic diagram of the second state structure of an intelligent hydraulic walking device for fixing the secondary lining steel bars of a large-span tunnel according to the present invention;

[0024] Figure 4 This is a schematic diagram of the third state structure of an intelligent hydraulic walking device for fixing the secondary lining steel bars of a large-span tunnel according to the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the fourth state of an intelligent hydraulic walking device for fixing the secondary lining steel bars of a large-span tunnel according to the present invention;

[0026] Figure 6 This is a schematic diagram of the fifth state structure of an intelligent hydraulic walking device for fixing the secondary lining steel bars of a large-span tunnel according to the present invention;

[0027] Figure 7 This is a sixth state structural schematic diagram of an intelligent hydraulic walking device for fixing the secondary lining steel bars of a large-span tunnel according to the present invention;

[0028] Description of main symbols

[0029] In the figure: 1. mounting frame; 11. first limit block; 12. second limit block; 13. third limit block; 2. first traveling frame; 21. first hydraulic cylinder; 3. second traveling frame; 31. second hydraulic cylinder; 4. bidirectional screw rod; 41. forward threaded portion; 42. reverse threaded portion; 5. control box. DETAILED DESCRIPTION

[0030] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0031] See also Figure 1-7 The present embodiment provides an intelligent hydraulic walking device for fixing the second lining steel bars of a large-span tunnel, comprising a mounting frame 1 and a first walking frame 2 and a second walking frame 3 installed on the lower side of the mounting frame 1. A first hydraulic cylinder 21 is arranged on the lower side of the first walking frame 2 on the lower side of the mounting frame 1, and a second hydraulic cylinder 31 is arranged on the lower side of the second walking frame 3; a guide groove is provided at the bottom of the mounting frame 1, and a rotatable bidirectional screw rod 4 is arranged in the guide groove along its length direction, and a forward threaded portion 41 and a reverse threaded portion 42 are respectively provided on the bidirectional screw rod 4, a first slider is screwed on the forward threaded portion 41, the first slider is fixed to the first walking frame 2, and a second slider is screwed on the reverse threaded portion 42, and the second slider is fixed to the second walking frame 3. When the bidirectional screw rod 4 rotates, the first slider and the second slider drive the first walking frame 2 and the second walking frame 3 to approach or move away from each other.

[0032] It can be understood that in this embodiment, the thread transmission principle of the bidirectional screw 4 and the first slider and the second slider is used, combined with the support and driving functions of the first hydraulic cylinder 21 and the second hydraulic cylinder 31, to achieve automatic adjustment of the distance between the first walking frame 2 and the second walking frame 3 and stable walking. The forward threaded portion 41 and the reverse threaded portion 42 on the bidirectional screw 4 are respectively screwed with the first slider and the second slider. When the bidirectional screw 4 rotates, the first slider and the second slider will move relative to or away from each other along the length direction of the screw, thereby driving the first walking frame 2 and the second walking frame 3 fixed on the first slider and the second slider to move closer to or away from each other. At the same time, by controlling the extension and retraction of the first hydraulic cylinder 21 and the second hydraulic cylinder 31, the height and support force of the walking frame can be adjusted to ensure the stability and safety of the equipment during walking.

[0033] Furthermore, the mounting frame 1 is provided with a control box 5, which has a built-in drive motor that is transmission-connected to the bidirectional screw rod 4, and a switch operating member that is electrically connected to the drive motor is provided on the control box 5, and the switch operating member is used to control the drive motor to start or stop working. In actual applications, construction workers generally perform construction work on the upper side of the mounting frame 1. In this embodiment, the control box 5 is arranged on the upper side of the mounting frame 1, so that the construction workers can control whether the overall walking device is started or not on the upper side of the mounting frame 1, which is more convenient for the construction workers to operate at the construction site.

[0034] Furthermore, the bottom side of the mounting frame 1 is provided with a first limit block 11 and a second limit block 12, respectively. The first limit block 11 is installed at the limit position of the first traveling frame 2 away from the second traveling frame 3, and when the first traveling frame 2 is away from the second traveling frame 3 to the limit position, it abuts against the first limit block 11 for limiting position. The second limit block 12 is installed at the limit position of the second traveling frame 3 away from the first traveling frame 2, and when the second traveling frame 3 is away from the first traveling frame 2 to the limit position, it abuts against the second limit block 12 for limiting position. When the first traveling frame 2 and the second traveling frame 3 move under the drive of the bidirectional screw 4, once they reach their limit positions away from each other, they will abut against the first limit block 11 and the second limit block 12, respectively, thereby preventing them from continuing to move. By limiting the moving range of the first traveling frame 2 and the second traveling frame 3, equipment damage or safety accidents caused by excessive movement are prevented, thereby improving the safety of the equipment.

[0035] Specifically, the first walking frame 2 is provided with a first reversal trigger structure on one side toward the first limit block 11, and the first limit block 11 is provided with a first reversal response structure on one side toward the first walking frame 2, and the first reversal response structure is electrically connected to the drive motor. When the first walking frame 2 is in contact with the first limit block 11, the first reversal response structure is connected with the first reversal trigger structure and sends a reversal signal to the drive motor to change the power direction of the drive motor. It can be selected that the first reversal response structure is an electrical component (such as a micro switch, a proximity sensor, etc.), which is electrically connected to the drive motor. When the first reversal trigger structure is connected with the first reversal response structure, the first reversal response structure will send a reversal signal to the drive motor. After the drive motor receives the reversal signal, it will change its power direction, thereby driving the bidirectional screw rod 4 to reverse, so that the first walking frame 2 and the second walking frame 3 move in the direction opposite to the original motion direction. Optionally, when the first reversal response structure is triggered, a forward rotation instruction is sent to the drive motor, and when the drive motor rotates forward, the bidirectional screw rod 4 will be driven to drive the first walking frame 2 and the second walking frame 3 to approach each other. Therefore, when the first traveling frame 2 and the second traveling frame 3 move away from each other to the extreme position, the moving direction will be automatically adjusted to move toward the direction of approaching each other.

[0036] See also Figures 2 to 7, a first cylinder retraction response structure is also provided on the side of the first traveling frame 2 facing the first limit block 11, and a first cylinder retraction trigger structure is also provided on the side of the first limit block 11 facing the first traveling frame 2. The first cylinder retraction response structure is electrically connected to the first hydraulic cylinder 21. When the first traveling frame 2 abuts against the first limit block 11, the first cylinder retraction response structure is connected to the first cylinder retraction trigger structure and sends a contraction signal to the first hydraulic cylinder 21, so that the telescopic end of the first hydraulic cylinder 21 is retracted. Optionally, the first cylinder retraction response structure is an electrical component (such as a micro switch, a proximity sensor, etc.), which is electrically connected to the control system of the first hydraulic cylinder 21. When the first cylinder retraction trigger structure is connected to the first cylinder retraction response structure, the control system of the first hydraulic cylinder 21 will receive a contraction signal, and then control the valve of the first hydraulic cylinder 21 to open, so that the hydraulic oil in the first hydraulic cylinder 21 refluxes, causing the telescopic end of the first hydraulic cylinder 21 to contract until the extension distance of the telescopic end of the first hydraulic cylinder 21 is the shortest.

[0037] Furthermore, a first extension cylinder response structure is provided on the side of the second traveling frame 3 facing the second limit block 12, and a first extension cylinder trigger structure is provided on the side of the second limit block 12 facing the second traveling frame 3. The first extension cylinder response structure is electrically connected to the second hydraulic cylinder 31. When the second traveling frame 3 abuts against the second limit block 12 to limit, the first extension cylinder response structure is connected to the first extension cylinder trigger structure and sends an extension signal to the second hydraulic cylinder 31 to extend the telescopic end of the second hydraulic cylinder 31. Optionally, the first extension cylinder response structure is an electrical component (such as a micro switch, a proximity sensor, etc.), which is electrically connected to the control system of the second hydraulic cylinder 31. When the first extension cylinder trigger structure is connected to the first extension cylinder response structure, the control system of the second hydraulic cylinder 31 will receive an extension signal, and then control the valve of the second hydraulic cylinder 31 to open, so that the hydraulic oil enters the high-pressure chamber of the second hydraulic cylinder 31, and pushes the telescopic end of the second hydraulic cylinder 31 to extend until the extension distance of the telescopic end of the second hydraulic cylinder 31 is the longest.

[0038] In this embodiment, the distance from the first slider to the center of the bidirectional screw rod 4 is equal to the distance from the second slider to the center of the bidirectional screw rod 4. Therefore, when the first traveling frame 2 abuts against the first limit block 11, the second traveling frame 3 must also abut against the second limit block 12. At this time, due to the contraction of the first hydraulic cylinder 21 and the extension of the second hydraulic cylinder 31, the first traveling frame 2 will be at a low height and the second traveling frame 3 will be at a high height. That is, at this time, the main weight of the equipment relies on the support of the first traveling frame 2. At this time, if the bidirectional screw rod 4 drives the first traveling frame 2 and the second traveling frame 3 to approach each other, the first traveling frame 2 and the ground are relatively stationary, and the second traveling frame 3 and the entire equipment move toward the direction of the first traveling frame 2 to realize the walking displacement of the entire equipment.

[0039] Furthermore, a third limit block 13 is provided on the bottom side of the mounting frame 1. The third limit block 13 is installed at the limit position where the first walking frame 2 and the second walking frame 3 approach each other. When the first walking frame 2 and the second walking frame 3 approach each other to the limit position, the two sides of the third limit block 13 respectively contact and limit the first walking frame 2 and the second walking frame 3. In this embodiment, the first walking frame 2 and the second walking frame 3 begin to approach each other under the drive of the bidirectional screw 4. Due to the supporting effect of the first walking frame 2, it remains relatively still with the ground during the movement. When the first walking frame 2 and the second walking frame 3 approach each other and move to the limit position, they contact the third limit block 13 respectively. The third limit block 13 applies resistance to the continued approach of the first walking frame 2 and the second walking frame 3, preventing them from continuing to move. At this time, the first walking frame 2 and the second walking frame 3 are fixed at the limit position and can no longer approach each other.

[0040] Specifically, the first walking frame 2 is provided with a second reversal trigger structure towards one side of the third limit block 13, and the third limit block 13 is provided with a second reversal response structure towards one side of the first walking frame 2, and the second reversal response structure is electrically connected to the drive motor. When the first walking frame 2 is in contact with the third limit block 13, the second reversal response structure is connected with the second reversal trigger structure and sends a reversal signal to the drive motor to change the power direction of the drive motor. It can be selected that the second reversal response structure is an electrical component (such as a micro switch, a proximity sensor, etc.), which is electrically connected to the drive motor. When the second reversal trigger structure is connected with the second reversal response structure, the second reversal response structure will send a reversal signal to the drive motor. After the drive motor receives the reversal signal, it will change its power direction, thereby driving the bidirectional screw rod 4 to reverse, so that the first walking frame 2 and the second walking frame 3 move in the direction opposite to the original motion direction. Optionally, when the second reversal response structure is triggered, a reversal instruction is sent to the drive motor, and when the drive motor turns reverse, the bidirectional screw rod 4 will be driven to drive the first walking frame 2 and the second walking frame 3 away from each other. Therefore, when the first traveling frame 2 and the second traveling frame 3 approach each other to the limit position, the moving direction will be automatically adjusted to move in the direction away from each other.

[0041] See also Figures 2 to 7, a second extension cylinder response structure is provided on the side of the first traveling frame 2 facing the third limit block 13, a second extension cylinder trigger structure is provided on the side of the third limit block 13 facing the first traveling frame 2, the second extension cylinder response structure is electrically connected to the first hydraulic cylinder 21, when the first traveling frame 2 is in contact with the third limit block 13, the second extension cylinder response structure is connected to the second extension cylinder trigger structure and sends an extension signal to the first hydraulic cylinder 21, so that the telescopic end of the second hydraulic cylinder 31 is extended. Optionally, the second extension cylinder response structure is an electrical component (such as a micro switch, a proximity sensor, etc.), which is electrically connected to the control system of the first hydraulic cylinder 21, when the second extension cylinder trigger structure is connected to the second extension cylinder response structure, the control system of the first hydraulic cylinder 21 will receive an extension signal, and then control the valve of the first hydraulic cylinder 21 to open, so that the hydraulic oil enters the high-pressure chamber of the first hydraulic cylinder 21, and pushes the telescopic end of the first hydraulic cylinder 21 to extend until the extension distance of the telescopic end of the first hydraulic cylinder 21 is the longest.

[0042] Specifically, a second cylinder retraction response structure is provided on the side of the second traveling frame 3 facing the third limit block 13, and a second cylinder retraction trigger structure is also provided on the side of the third limit block 13 facing the second traveling frame 3. The second cylinder retraction response structure is electrically connected to the second hydraulic cylinder 31. When the second traveling frame 3 is in contact with the third limit block 13, the second cylinder retraction response structure is connected to the second cylinder retraction trigger structure and sends a contraction signal to the second hydraulic cylinder 31, so that the telescopic end of the second hydraulic cylinder 31 is retracted. Optionally, the second cylinder retraction response structure is an electrical component (such as a micro switch, a proximity sensor, etc.), which is electrically connected to the control system of the second hydraulic cylinder 31. When the second cylinder retraction trigger structure is connected to the second cylinder retraction response structure, the control system of the second hydraulic cylinder 31 will receive a contraction signal, and then control the valve of the second hydraulic cylinder 31 to open, so that the hydraulic oil in the second hydraulic cylinder 31 flows back, causing the telescopic end of the second hydraulic cylinder 31 to contract until the extension distance of the telescopic end of the second hydraulic cylinder 31 is the shortest.

[0043] In a possible implementation process, when the walking device of this embodiment is working, the bidirectional screw rod 4 is first driven to reverse, so that the first walking frame 2 and the second walking frame 3 are separated from each other, until the first walking frame 2 and the second walking frame 3 are respectively abutted against the first limit block 11 and the second limit block 12, so that the first hydraulic cylinder 21 is contracted and the second hydraulic cylinder 31 is extended, and the driving motor drives the bidirectional screw rod 4 to rotate forward. At this time, the first walking frame 2 is relatively stationary with the ground as the main supporting structure, and the second walking frame 3 and the mounting frame 1 move toward the first walking frame 2 under the transmission action of the bidirectional screw rod 4. When the first walking frame 2 and the second walking frame 3 are respectively abutted against the third limit block 13, the first hydraulic cylinder 21 is extended and the second hydraulic cylinder 31 is contracted, and the driving motor drives the bidirectional screw rod 4 to reverse. At this time, the second walking frame 3 is relatively stationary with the ground as the main supporting structure, and the first walking frame 2 and the mounting frame 1 move toward the first walking frame 2 under the transmission action of the bidirectional screw rod 4.

[0044] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An intelligent hydraulic walking device for fixing the secondary lining steel bars of large-span tunnels. Features: The invention comprises a mounting frame and a first walking frame and a second walking frame installed at the lower side of the mounting frame, a first hydraulic cylinder is arranged on the lower side of the first walking frame at the lower side of the mounting frame, and a second hydraulic cylinder is arranged on the lower side of the second walking frame; a guide groove is arranged at the bottom of the mounting frame, a rotatable bidirectional screw rod is arranged in the guide groove along its length direction, a forward threaded portion and a reverse threaded portion are respectively arranged on the bidirectional screw rod, a first slider is screwed on the forward threaded portion, the first slider is fixed to the first walking frame, a second slider is screwed on the reverse threaded portion, and the second slider is fixed to the second walking frame, and when the bidirectional screw rod rotates, the first slider and the second slider drive the first walking frame and the second walking frame to approach or move away from each other.

2. According to claim 1, an intelligent hydraulic walking device for fixing the secondary lining steel bars of a large-span tunnel, Features: A control box is provided on the mounting frame, and a drive motor is built in the control box and is transmission-connected to the bidirectional lead screw. A switch operating member is provided on the control box and is electrically connected to the drive motor. The switch operating member is used to control the drive motor to start or stop working.

3. According to claim 2, an intelligent hydraulic walking device for fixing the secondary lining steel bars of a large-span tunnel, Features: The bottom sides of the mounting frame are respectively provided with a first limit block and a second limit block. The first limit block is installed at the extreme position of the first walking frame away from the second walking frame, and when the first walking frame is away from the second walking frame to the extreme position, it abuts against the first limit block for limiting position. The second limit block is installed at the extreme position of the second walking frame away from the first walking frame, and when the second walking frame is away from the first walking frame to the extreme position, it abuts against the second limit block for limiting position.

4. According to claim 3, an intelligent hydraulic walking device for fixing the secondary lining steel bars of a large-span tunnel, Features: A first reversal trigger structure is provided on the side of the first walking frame facing the first limit block, and a first reversal response structure is provided on the side of the first limit block facing the first walking frame. The first reversal response structure is electrically connected to the drive motor. When the first walking frame abuts against the first limit block for a limit, the first reversal response structure is connected to the first reversal trigger structure and sends a reversal signal to the drive motor to change the power direction of the drive motor.

5. According to claim 4, an intelligent hydraulic walking device for fixing the secondary lining steel bars of a large-span tunnel, Features: A first cylinder retraction response structure is also provided on the side of the first walking frame facing the first limit block, and a first cylinder retraction trigger structure is also provided on the side of the first limit block facing the first walking frame. The first cylinder retraction response structure is electrically connected to the first hydraulic cylinder. When the first walking frame abuts against the first limit block for limiting the position, the first cylinder retraction response structure is connected to the first cylinder retraction trigger structure and sends a contraction signal to the first hydraulic cylinder to retract the telescopic end of the first hydraulic cylinder.

6. According to claim 5, an intelligent hydraulic walking device for fixing the secondary lining steel bars of a large-span tunnel, Features: A first extension cylinder response structure is provided on the side of the second walking frame facing the second limit block, and a first extension cylinder trigger structure is provided on the side of the second limit block facing the second walking frame. The first extension cylinder response structure is electrically connected to the second hydraulic cylinder. When the second walking frame abuts against the second limit block for limit, the first extension cylinder response structure is connected to the first extension cylinder trigger structure and sends an extension signal to the second hydraulic cylinder to extend the telescopic end of the second hydraulic cylinder.

7. According to claim 2, an intelligent hydraulic walking device for fixing the secondary lining steel bars of a large-span tunnel, Features: A third limit block is provided on the bottom side of the mounting frame, and the third limit block is installed at the extreme position where the first walking frame and the second walking frame are close to each other. When the first walking frame and the second walking frame are close to each other to the extreme position, two sides of the third limit block are respectively abutted against the first walking frame and the second walking frame for limiting position.

8. The intelligent hydraulic walking device for fixing the secondary lining steel bars of a large-span tunnel according to claim 7, Features: A second reversal trigger structure is provided on the side of the first walking frame facing the third limit block, and a second reversal response structure is provided on the side of the third limit block facing the first walking frame. The second reversal response structure is electrically connected to the drive motor. When the first walking frame abuts against the third limit block for limiting, the second reversal response structure is connected to the second reversal trigger structure and sends a reversal signal to the drive motor to change the power direction of the drive motor.

9. The intelligent hydraulic walking device for fixing the secondary lining steel bars of a large-span tunnel according to claim 8, Features: A second extension cylinder response structure is provided on the side of the first walking frame facing the third limit block, and a second extension cylinder trigger structure is provided on the side of the third limit block facing the first walking frame. The second extension cylinder response structure is electrically connected to the first hydraulic cylinder. When the first walking frame abuts against the third limit block for limiting, the second extension cylinder response structure is connected to the second extension cylinder trigger structure and sends an extension signal to the first hydraulic cylinder to extend the telescopic end of the second hydraulic cylinder.

10. An intelligent hydraulic walking device for fixing the secondary lining steel bars of a large-span tunnel according to claim 9, Features: A second cylinder retraction response structure is provided on the side of the second walking frame facing the third limit block, and a second cylinder retraction trigger structure is also provided on the side of the third limit block facing the second walking frame. The second cylinder retraction response structure is electrically connected to the second hydraulic cylinder. When the second walking frame abuts against the third limit block for limiting the position, the second cylinder retraction response structure is connected to the second cylinder retraction trigger structure and sends a contraction signal to the second hydraulic cylinder to retract the telescopic end of the second hydraulic cylinder.

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