Tunnel primary support sprayed concrete flatness optimizing device

Abstract

The utility model relates to a flatness optimizing device, belongs to the technical field of concrete construction, and particularly relates to a tunnel primary support sprayed concrete flatness optimizing device which comprises an arch-shaped framework, a threaded groove is formed in the bottom of the arch-shaped framework, and a rigid dazzle scraping hoop is fixedly installed at the end of the arch-shaped framework. Pulleys are rotationally mounted at the two end parts of the arch-shaped framework; the utility model achieves the effect of improving the overall flatness of sprayed concrete so as to improve the quality and efficiency of tunnel construction, and solves the problems that although the prior art can be matched with a mechanical arm to achieve the effect of spraying and leveling while spraying, the use space of the mechanical arm has a certain requirement, and the use space of the mechanical arm is limited during tunnel construction. And for a construction environment with a small space, normal work is not facilitated, and the practicability is low.

Description

Technical Field

[0001] This utility model relates to the field of concrete construction technology, and in particular to a device for optimizing the flatness of shotcrete in the initial support of tunnels. Background Technology

[0002] The smoothness of the shotcrete in the initial support of the tunnel directly affects the appearance quality of the tunnel and the smooth progress of subsequent construction. In common construction methods, the smoothness of the shotcrete mainly depends on the operating experience and proficiency of the construction personnel. However, this method is prone to causing a large amount of rebound in the shotcrete and serious waste of materials.

[0003] A search revealed Chinese patent CN220451895U, which discloses a tunnel shotcrete surface leveling device, including a scraper, a connector, and a wing plate. Used in conjunction with a wet spraying robot, it effectively controls the initial support flatness and significantly improves construction efficiency. During the layered and segmented spraying process of the wet spraying robot, the scraper repeatedly scrapes the surface to remove protruding concrete from the steel frame or initial support, ensuring a flat initial support surface. Finally, the surface is finished on the relatively flat initial support surface, resulting in a final initial support surface flatness that meets specifications. The leveling device can be installed simply by connecting the wing plate to the front end of the robot arm and the connector to the nozzle base. The scraper begins to level the initial support surface as the robot arm operates, making construction convenient and significantly more efficient than the previous method of manually leveling concrete surfaces with a shovel.

[0004] Based on the above search results combined with existing technologies;

[0005] Although the aforementioned patent can be used in conjunction with a robotic arm to achieve the effect of spraying and smoothing simultaneously, the robotic arm has certain space requirements. In tunnel construction, it is not conducive to normal operation in some small construction environments, resulting in low practicality and thus certain limitations. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model proposes a device for optimizing the flatness of shotcrete in the initial support of tunnels, which improves the overall flatness of the shotcrete, thereby enhancing the quality and efficiency of tunnel construction.

[0007] The technical solution to achieve the purpose of this utility model is: a device for optimizing the flatness of shotcrete in tunnel initial support, comprising an arched frame, a threaded groove at the bottom of the arched frame, a rigid scraper hoop fixedly installed at the end of the arched frame, and pulleys rotatably installed at both ends of the arched frame.

[0008] In some embodiments, the end of the bow-shaped frame is threadedly connected to a long steel pipe via a threaded groove, and an anti-slip handle is fixedly installed at one end of the long steel pipe.

[0009] In some embodiments, the end of the bow-shaped frame is connected to a connecting sleeve by a thread, and a plurality of clamping strips are fixedly installed at equal intervals on the end of the connecting sleeve.

[0010] In some embodiments, the ends of the plurality of clamping bars are provided with a first clamping ring and a second clamping ring, and an arc bolt is fixedly installed between the first clamping ring and the second clamping ring.

[0011] In some embodiments, the first snap-fit ​​ring has a storage groove, and the end of the second snap-fit ​​ring slides into the storage groove.

[0012] Compared with existing technologies, the significant advantages of this invention are:

[0013] Firstly, this utility model uses a rigid scraper hoop to level the shotcrete, which is applicable to tunnel curved surfaces at different angles; the small pulleys on both sides facilitate control of the concrete protective layer; large areas of leveling can be done using a robotic arm, while areas with narrow operating space can be leveled manually using a detachable device, greatly improving the practicality of the device.

[0014] Secondly, this utility model uses economical materials, is safe and reliable in construction, is easy to promote and apply, and the optimized application of the device can effectively improve the smoothness of the initial support shotcrete in tunnels, reduce material waste, and improve construction efficiency and quality.

[0015] This solves the problem that while existing technologies can be used in conjunction with robotic arms to achieve the effect of spraying and smoothing simultaneously, the robotic arms have certain space requirements. In tunnel construction, they are not conducive to normal operation in some small construction environments, resulting in low practicality. Attached Figure Description

[0016] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a schematic diagram of the bow-shaped skeleton structure provided in one embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the overall three-dimensional structure provided in one embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the overall three-dimensional structure of the present invention provided in two embodiments;

[0020] Figure 4 This is a schematic diagram of the snap ring structure provided in two embodiments of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Arch-shaped frame; 2. Threaded groove; 3. Rigid scraper hoop; 4. Pulley; 5. Long steel pipe; 6. Anti-slip handle cover; 7. Connecting sleeve; 8. Clamping strip; 9. Snap-fit ​​ring one; 10. Snap-fit ​​ring two; 11. Storage groove; 12. Arc bolt. Detailed Implementation

[0023] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0024] This utility model provides an improved device for optimizing the smoothness of shotcrete in tunnel initial support. The technical solution of this utility model is as follows:

[0025] Example 1

[0026] like Figures 1-2 As shown, a device for optimizing the flatness of shotcrete in the initial support of a tunnel includes an arched frame 1. The bottom of the arched frame 1 is provided with a threaded groove 2. A rigid scraper hoop 3 is fixedly installed at the end of the arched frame 1. Pulleys 4 are rotatably installed at both ends of the arched frame 1. The arched frame 1 and the rigid scraper hoop 3 can be used to adapt to the curved surface of the tunnel at different angles, and the pulleys 4 facilitate the control of the concrete protective layer.

[0027] like Figures 1-2 As shown, the end of the bow-shaped frame 1 is threadedly connected to a long steel pipe 5 through a threaded groove 2. One end of the long steel pipe 5 is fixedly installed with an anti-slip handle 6. The long steel pipe 5 and the anti-slip handle 6 make it easier for construction workers to use their hands to perform scraping construction in a small space, thereby reducing the traditional workload and improving construction efficiency and quality.

[0028] Based on the tunnel initial support shotcrete smoothness optimization device provided in the first embodiment of this application, the second embodiment of this application proposes another tunnel initial support shotcrete smoothness optimization device. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0029] The second embodiment of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0030] like Figures 3-4As shown, the end of the bow-shaped frame 1 is connected to the connecting sleeve 7 by a thread. Multiple clamping strips 8 are fixedly installed at equal intervals on the end of the connecting sleeve 7. The connecting sleeve 7 can fix the leveling optimization device to the sprayed concrete robotic arm, thereby ensuring that in tunnel construction, for tunnels with high internal spaces, the robotic arm can carry the scraper device to perform leveling operations, improving the efficiency and quality of leveling.

[0031] like Figures 3-4 As shown, the ends of the multiple clamping bars 8 are provided with snap ring 1 9 and snap ring 2 10. An arc bolt 12 is fixedly installed between snap ring 1 9 and snap ring 2 10. The clamping bars 8 can improve the stability of the connection between the connecting sleeve 7 and the robotic arm. The snap ring 1 9 and snap ring 2 10, through the arc bolt 12, can greatly improve the clamping effect of the multiple clamping bars 8.

[0032] like Figures 3-4 As shown, a storage groove 11 is provided inside the snap ring 19. The end of the snap ring 2 10 slides in the storage groove 11. The storage groove 11 can effectively store the end of the snap ring 2 10 into the snap ring 19, which facilitates adjustment according to different robot arm diameters and ensures clamping stability.

[0033] The specific working method is as follows: When constructing in the tunnel, after the shotcrete is sprayed, this device is connected to the mechanical arm of the spraying device through the connecting sleeve 7, and the clamping strip 8 at the end is contracted through the arc bolt 12, thereby improving the connection effect between the connecting sleeve 7 and the mechanical arm. This ensures that the device can work stably during the leveling operation. When constructing in a small space, the mechanical arm cannot work flexibly. Simply remove the connecting sleeve 7 from the arc frame 1, connect the long steel pipe 5, and then manually hold it with the anti-slip handle 6. This ensures that the leveling operation of the overall shotcrete in the tunnel is carried out smoothly, thereby improving the overall construction efficiency and quality.

[0034] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of equivalent substitutions of the above technical features. Matters not covered in this utility model are common knowledge to those skilled in the art.

Claims

1. A device for optimizing the smoothness of shotcrete in the initial support of a tunnel, comprising an arched frame (1), wherein the bottom of the arched frame (1) is provided with a threaded groove (2), characterized in that: The end of the bow-shaped frame (1) is fixedly installed with a rigid scraper hoop (3), and both ends of the bow-shaped frame (1) are rotatably installed with pulleys (4).

2. The device for optimizing the smoothness of shotcrete in the initial support of a tunnel according to claim 1, characterized in that: The end of the bow-shaped frame (1) is threadedly connected to a long steel pipe (5) through a threaded groove (2), and a non-slip handle (6) is fixedly installed at one end of the long steel pipe (5).

3. The tunnel initial support shotcrete smoothness optimization device according to claim 1, characterized in that: The end of the bow-shaped frame (1) is connected to a connecting sleeve (7) by a thread, and multiple clamping strips (8) are fixedly installed at equal intervals on the end of the connecting sleeve (7).

4. The tunnel initial support shotcrete smoothness optimization device according to claim 3, characterized in that: The ends of the multiple clamping bars (8) are provided with a first clamping ring (9) and a second clamping ring (10), and an arc bolt (12) is fixedly installed between the first clamping ring (9) and the second clamping ring (10).

5. The tunnel initial support shotcrete smoothness optimization device according to claim 4, characterized in that: The first snap ring (9) has a storage groove (11) inside, and the end of the second snap ring (10) is slidably engaged with the storage groove (11).

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