Steel arch connecting structure for tunnel primary support

Abstract

The utility model relates to the technical field of tunnels, and discloses a steel arch frame connecting structure of a tunnel primary support, which comprises a steel arch frame, square plates are fixedly connected with the left end and the right end of the steel arch frame, a connecting assembly is arranged at one end, far away from the steel arch frame, of each square plate, a positioning hole is formed in each square plate, and each connecting assembly comprises a fixing block. A cylindrical block is fixedly connected into the fixing block in a penetrating mode, and a threaded rod is connected into the cylindrical block in a threaded mode. The connecting rod transmits the borne thrust to the sliding block, the sliding block is stressed to move towards the outer side along the opening of the cylindrical block, the arc-shaped concave plate is pushed by the sliding block to make contact with the inner wall of the positioning hole of the square plate, at the moment, the square plate is fixed, the arc-shaped concave plate can adapt to positioning holes with different diameters and fix the positioning holes, and the positioning holes with different diameters can be fixed through the arc-shaped concave plate. The practicability is high, and the situation that when screws are used for installation and fixation, the screws are difficult to take out from the positioning holes due to rusting is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnels, in particular to a steel arch frame connection structure for initial support of a tunnel. Background Art

[0002] Most of the steel arch frames currently used are fixed with screws, but the screws will gradually rust with increasing use and due to the humid environment inside the tunnel. The rusted screws will have a great impact on the disassembly work, and due to the different positioning holes, different types of screws are needed to fix the steel arch frames, which will also affect the installation work to a certain extent. For this reason, we proposed a steel arch frame connection structure for the initial support of the tunnel. Utility Model Content

[0003] The utility model aims to provide a steel arch connection structure for initial support of a tunnel, so as to solve the problems raised in the above-mentioned background technology.

[0004] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0005] The utility model discloses a steel arch frame connection structure for initial support of a tunnel, comprising a steel arch frame, wherein the left and right ends of the steel arch frame are fixedly connected with a square plate, an end of the square plate away from the steel arch frame is provided with a connection assembly, and a positioning hole is opened inside the square plate.

[0006] The connecting assembly includes a fixed block, wherein the fixed block is fixedly connected with a cylindrical block passing through the inside of the fixed block, a threaded rod is threadedly connected to the inside of the cylindrical block, an end of the threaded rod away from the cylindrical block is fixedly connected to a hexagonal block, the hexagonal block is fixedly connected to a circular plate on the side close to the threaded rod, the threaded rod away from the hexagonal block is rotatably connected to a circular push plate, the bottom of the circular push plate is fixedly connected to a connecting block 1, the connecting block 1 is rotatably connected to a connecting rod, the outer surface of the cylindrical block is provided with an opening, the opening is slidably connected with a sliding block, the end of the connecting rod away from the connecting block 1 is rotatably connected to the sliding block, the end of the sliding block away from the connecting rod passes through the opening and extends to the outside, the end of the sliding block away from the connecting rod is fixedly connected to an arc-shaped concave plate, and the outer surface of the arc-shaped concave plate is in contact with the inner wall of the positioning hole.

[0007] Furthermore, a spring 1 is sleeved on the outside of the cylindrical block, one end of the spring 1 is fixedly connected to the fixed block, and the other end of the spring 1 is in contact with the square plate, and the outer surface of the circular push plate is in contact with the inner surface of the cylindrical block.

[0008] Furthermore, a circular column is slidably connected to the central axis inside the fixed block, a square groove is opened inside the fixed block, the upper and lower ends of the inner wall of the square groove are in contact with square plates, and a second spring is fixedly installed on the side where the two square plates are close to each other.

[0009] Furthermore, a slide groove is provided on the outer surface of the circular column, a circular groove is provided at the central axis inside the square plate, a clamping block is fixedly connected to the inner wall of the circular groove, the inner wall of the circular groove and the outer wall of the circular column are adapted to each other, and the slide groove and the clamping block are adapted to each other.

[0010] Furthermore, one end of the circular column away from the fixed block is fixedly connected to a connecting block 2, the outer surface of the connecting block 2 is rotatably connected to a support plate 1, and one end of the connecting block 2 away from the circular column is provided with a connecting block 3, the outer surface of the connecting block 3 is rotatably connected to the support plate 2, and one end of the connecting block 3 away from the fixed block is fixedly connected to a support frame plate, and the support frame plate is in contact with the square plate.

[0011] Furthermore, hollow grooves are provided inside the support plate one and the support plate two, short rods are passed through the hollow grooves, the left and right ends of the short rods are rotatably connected to a connecting frame, a rotating shaft is rotatably connected to the central axis inside the connecting frame, a circular block is fixedly connected to the outer surface of the rotating shaft, and gear teeth are fixedly connected to the outer surface of the circular block, and a gear groove is provided on the side where the support plate one and the support plate two are close to each other, and the gear groove is meshed with the gear teeth.

[0012] The utility model has the following beneficial effects:

[0013] (1) In the utility model, the connecting rod transmits the thrust received to the sliding block, and the sliding block is forced to move outward along the opening of the cylindrical block. The arc-shaped concave plate is pushed by the sliding block and contacts the inner wall of the positioning hole of the square plate, thereby completing the fixation of the square plate. The arc-shaped concave plate can adapt to positioning holes of different diameters and fix them, and is highly practical. It avoids the situation in which the screws are difficult to remove from the positioning holes due to rust when being installed and fixed with screws.

[0014] (2) In the present invention, the support frame can provide a certain degree of toughness support to the square plate and the steel arch frame, so that the steel arch frame has a certain degree of adjustability instead of being unable to move after being fixed in the traditional way, thereby improving the steel arch frame's ability to withstand external impact forces.

[0015] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the overall structure of the connection assembly of the utility model;

[0019] Figure 3 This is a schematic diagram of the overall structure of the fixed block of the utility model;

[0020] Figure 4 It is a schematic diagram of the overall structure of the cylindrical block of the utility model;

[0021] Figure 5 For this utility model Figure 4 A is a partial enlarged schematic diagram;

[0022] Figure 6 This is a schematic diagram of the internal structure of the fixed block of the utility model;

[0023] Figure 7 This is a schematic diagram of the overall structure of the square frame plate of the utility model;

[0024] Figure 8 For this utility model Figure 7 A partial enlarged schematic diagram of B in the figure.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] In the figure: 1, steel arch frame; 2, square plate; 3, connecting assembly; 31, fixed block; 32, cylindrical block; 321, threaded rod; 322, hexagonal block; 323, circular plate; 324, circular push plate; 325, connecting block one; 326, connecting rod; 327, sliding block; 328, arc concave plate; 33, circular column; 34, square plate; 35, connecting block two; 36, supporting plate two; 37, connecting block three; 38, supporting plate one; 39, supporting frame plate; 40, short rod; 401, connecting frame; 402, rotating shaft; 403, circular block; 404, gear teeth. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-Figure 8 As shown, the utility model is a steel arch connection structure for initial support of a tunnel, comprising a steel arch 1, a square plate 2 is fixedly connected to the left and right ends of the steel arch 1, a connection assembly 3 is arranged at one end of the square plate 2 away from the steel arch 1, and a positioning hole is opened inside the square plate 2.

[0029] The connecting assembly 3 includes a fixed block 31, a cylindrical block 32 is fixedly connected to the fixed block 31, a threaded rod 321 is threadedly connected to the cylindrical block 32, an end of the threaded rod 321 away from the cylindrical block 32 is fixedly connected to a hexagonal block 322, a side of the hexagonal block 322 close to the threaded rod 321 is fixedly connected to a circular plate 323, an end of the threaded rod 321 away from the hexagonal block 322 is rotatably connected to a circular push plate 324, and a connecting block 325 is fixedly connected to the bottom of the circular push plate 324. A connecting rod 326 is rotatably connected inside the connecting block 325, an opening is opened on the outer surface of the cylindrical block 32, and a sliding block 327 is slidably connected inside the opening. The end of the connecting rod 326 away from the connecting block 325 is rotatably connected to the sliding block 327, and the end of the sliding block 327 away from the connecting rod 326 passes through the opening and extends to the outside. The end of the sliding block 327 away from the connecting rod 326 is fixedly connected to an arc-shaped concave plate 328, and the outer surface of the arc-shaped concave plate 328 is in contact with the inner wall of the positioning hole.

[0030] A spring 1 is sleeved on the outside of the cylindrical block 32 , one end of the spring 1 is fixedly connected to the fixed block 31 , and the other end of the spring 1 is in contact with the square plate 2 , and the outer surface of the circular push plate 324 is in contact with the inner surface of the cylindrical block 32 .

[0031] A circular column 33 is slidably connected to the central axis of the fixed block 31. A square groove is provided inside the fixed block 31. The upper and lower ends of the inner wall of the square groove are in contact with square plates 34. A spring 2 is fixedly installed on one side where the two square plates 34 are close to each other.

[0032] A slide groove is provided on the outer surface of the circular column 33, and a circular groove is provided at the central axis of the square plate 34. A clamping block is fixedly connected to the inner wall of the circular groove. The inner wall of the circular groove and the outer wall of the circular column 33 are adapted to each other, and the slide groove and the clamping block are adapted to each other.

[0033] One end of the circular column 33 away from the fixed block 31 is fixedly connected to a connecting block 2 35, and the outer surface of the connecting block 2 35 is rotatably connected to a support plate 1 38. One end of the connecting block 2 35 away from the circular column 33 is provided with a connecting block 37, and the outer surface of the connecting block 37 is rotatably connected to a support plate 2 36. The end of the connecting block 37 away from the fixed block 31 is fixedly connected to a support frame plate 39, and the support frame plate 39 is in contact with the square plate 2.

[0034] A hollow groove is provided inside the support plate 1 38 and the support plate 2 36, and a short rod 40 passes through the hollow groove. The left and right ends of the short rod 40 are rotatably connected to a connecting frame 401, and a rotating shaft 402 is rotatably connected to the central axis inside the connecting frame 401. A circular block 403 is fixedly connected to the outer surface of the rotating shaft 402, and a gear tooth 404 is fixedly connected to the outer surface of the circular block 403. A gear groove is provided on the side where the support plate 1 38 and the support plate 2 36 are close to each other, and the gear groove is meshed with the gear tooth 404.

[0035] When in use, the staff puts the cylindrical block 32 in the positioning hole of the square plate 2, then puts the wrench on the outside of the hexagonal block 322 and rotates it. The threaded rod 321 is forced to move the circular push plate 324 toward the inside of the cylindrical block 32, and the connecting block 1 325 is pushed by the circular push plate 324. The connecting rod 326 transmits the thrust received to the sliding block 327. The sliding block 327 is forced to move outward along the opening of the cylindrical block 32. The arc-shaped concave plate 328 is pushed by the sliding block 327 and contacts the inner wall of the positioning hole of the square plate 2. At this time, the square plate 2 is fixed. The arc-shaped concave plate 328 can adapt to positioning holes of different diameters and fix them. It is very practical and avoids the situation where the screws are rusted and difficult to remove from the positioning holes when using screws for installation and fixing.

[0036] The support frame plate 39 can provide a certain degree of toughness support to the square plate 2 and the steel arch frame 1, so that the steel arch frame 1 has a certain degree of adjustability. It is not that it cannot move after being fixed in the traditional way. The steel arch frame 1 has improved its ability to withstand external impact. When the steel arch frame 1 is stressed, the square plate 2 will be stressed synchronously. The square plate 2 will transmit the pressure it receives to the support frame plate 39. The connecting block 37 is stressed and drives the supporting plate 2 36 to move downward. The circular block 403 is affected by the gear 404 and rotates when the supporting plate 2 36 moves downward, and drives the supporting plate 1 38 located below to move upward. The supporting plate 1 38 moves upward with the circular column 33 through the connecting block 2 35. The supporting plate 1 38 and the supporting plate 2 36 on the other side will move to opposite positions. However, since the connecting component 3 is located between the two steel arch frames 1, the moving distance of the supporting plate 1 38 and the supporting plate 2 36 is shorter.

[0037] When the circular column 33 moves upward, it will drive the square plate 34 located at the bottom of the inner wall of the square groove to move upward. Since the distance between the two square plates 34 is shortened, the spring 2 will be squeezed, and the spring 2 will share a certain amount of pressure, thereby reducing the pressure on the supporting frame plate 39, and the circular column 33 can be restored to its original position when the pressure disappears.

[0038] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A steel arch connection structure for initial tunnel support, comprising a steel arch (1), wherein the left and right ends of the steel arch (1) are fixedly connected to a square plate (2), an end of the square plate (2) away from the steel arch (1) is provided with a connection assembly (3), and a positioning hole is provided inside the square plate (2), characterized in that: The connection assembly (3) comprises a fixed block (31), a cylindrical block (32) is fixedly connected to the fixed block (31), a threaded rod (321) is threadedly connected to the cylindrical block (32), an end of the threaded rod (321) away from the cylindrical block (32) is fixedly connected to a hexagonal block (322), a side of the hexagonal block (322) close to the threaded rod (321) is fixedly connected to a circular plate (323), an end of the threaded rod (321) away from the hexagonal block (322) is rotatably connected to a circular push plate (324), and the bottom of the circular push plate (324) is fixedly connected to a connection block ( 325), a connecting rod (326) is rotatably connected inside the connecting block (325), an opening is opened on the outer surface of the cylindrical block (32), a sliding block (327) is slidably connected inside the opening, one end of the connecting rod (326) away from the connecting block (325) is rotatably connected to the sliding block (327), one end of the sliding block (327) away from the connecting rod (326) passes through the opening and extends to the outside, one end of the sliding block (327) away from the connecting rod (326) is fixedly connected to an arc-shaped concave plate (328), and the outer surface of the arc-shaped concave plate (328) is in contact with the inner wall of the positioning hole.

2. The steel arch connection structure for initial tunnel support according to claim 1, characterized in that: A spring 1 is sleeved on the outside of the cylindrical block (32), one end of the spring 1 is fixedly connected to the fixed block (31), and the other end of the spring 1 is in contact with the square plate (2), and the outer surface of the circular push plate (324) is in contact with the inner surface of the cylindrical block (32).

3. The steel arch connection structure for initial tunnel support according to claim 2, characterized in that: A circular column (33) is slidably connected to the central axis of the fixed block (31), a square groove is provided inside the fixed block (31), the upper and lower ends of the inner wall of the square groove are in contact with square plates (34), and a second spring is fixedly installed on the side where the two square plates (34) are close to each other.

4. The steel arch connection structure for initial tunnel support according to claim 3 is characterized in that: The outer surface of the circular column (33) is provided with a slide groove, the inner central axis of the square plate (34) is provided with a circular groove, the inner wall of the circular groove is fixedly connected with a clamping block, the inner wall of the circular groove and the outer wall of the circular column (33) are mutually adapted, and the slide groove and the clamping block are mutually adapted.

5. The steel arch connection structure for initial tunnel support according to claim 4, characterized in that: The end of the circular column (33) away from the fixed block (31) is fixedly connected to a second connecting block (35), and the outer surface of the second connecting block (35) is rotatably connected to a first supporting plate (38). The end of the second connecting block (35) away from the circular column (33) is provided with a third connecting block (37), and the outer surface of the third connecting block (37) is rotatably connected to a second supporting plate (36). The end of the third connecting block (37) away from the fixed block (31) is fixedly connected to a supporting frame plate (39), and the supporting frame plate (39) is in contact with the square plate (2).

6. The steel arch connection structure for initial tunnel support according to claim 5, characterized in that: The support plate 1 (38) and the support plate 2 (36) are provided with hollow grooves, and a short rod (40) passes through the hollow grooves. The left and right ends of the short rod (40) are rotatably connected to a connecting frame (401), and a rotating shaft (402) is rotatably connected to the central axis of the connecting frame (401). A circular block (403) is fixedly connected to the outer surface of the rotating shaft (402), and a gear tooth (404) is fixedly connected to the outer surface of the circular block (403). A gear groove is provided on the side of the support plate 1 (38) and the support plate 2 (36) that are close to each other, and the gear groove is meshed with the gear tooth (404).

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