Tunnel steel arch connecting plate welding positioning device

Abstract

A tunnel steel arch connecting plate welding positioning device comprises a limiting clamping plate and a plurality of limiting screw rods, the limiting clamping plate is in a U shape, the limiting clamping plate is located at one end of a steel arch, the inner side wall of the limiting clamping plate is attached to a wing plate of steel arch I-shaped steel, one side of the limiting clamping plate is attached to the side, close to the steel arch, of a connecting plate, and the limiting screw rods are arranged on the limiting clamping plate. The multiple limiting screws correspond to the multiple bolt holes in the connecting plate in a one-to-one mode, and one ends of the limiting screws penetrate through the bolt holes in the connecting plate and then are connected to one side of the limiting clamping plate. According to the design, the steel arch is clamped through the limiting clamping plate, meanwhile, the connecting plate is limited through the limiting screw rod, and therefore alignment connection of the steel arch and the connecting plate can be rapidly achieved, and when the connecting plate and the steel arch are welded, the steel arch and the connecting plate are closely and flatly connected.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to a welding and positioning device for a tunnel steel arch frame connecting plate. Background Technology

[0002] In tunnel excavation, steel arch supports are often used for initial support, playing a crucial role in stabilizing the surrounding rock. Steel arches are typically fabricated on-site using I-beams. Based on the tunnel's outline dimensions and radius of curvature, a steel arch is generally composed of several I-beam segments, with each segment connected at the ends by connecting plates. However, during installation, a common problem is the misalignment of bolt holes between the connecting plates on two steel arches. A significant reason for this is inaccurate positioning of the connecting plates during welding to the steel arch. This not only greatly complicates construction but also reduces the overall support strength, significantly impacting the overall construction quality. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects and problems of poor welding positioning accuracy in the existing technology, and to provide a welding positioning device for tunnel steel arch frame connecting plates with high welding positioning accuracy.

[0004] To achieve the above objectives, the technical solution of this utility model is: a welding positioning device for a tunnel steel arch frame connecting plate, comprising a limiting plate and multiple limiting screws. The limiting plate is U-shaped, located at one end of the steel arch frame, with its inner sidewall abutting against the flange of the I-beam of the steel arch frame. One side of the limiting plate abuts against the side of the connecting plate closest to the steel arch frame. The multiple limiting screws correspond one-to-one with multiple bolt holes on the connecting plate. One end of each limiting screw passes through a bolt hole on the connecting plate and is connected to one side of the limiting plate.

[0005] A baffle is movably installed on the upper side of the limiting plate, and one side of the baffle abuts against the wing plate of the steel arch frame I-beam.

[0006] The upper side wall of the limiting plate has a slot, and the upper side of the baffle is inserted into the slot.

[0007] The lower side wall of the limiting plate is provided with a positioning groove, and the lower side of the baffle is inserted into the positioning groove.

[0008] A pull rod is connected to the upper side of the baffle.

[0009] The limiting screw is threaded with a limiting nut, which abuts against the side of the connecting plate away from the steel arch frame.

[0010] The limiting plate has a mounting hole, and one end of the limiting screw is connected to the mounting hole.

[0011] A handle is connected to the upper side of the limiting plate.

[0012] The handle is inverted U-shaped, and the two side walls of the handle are connected to the upper side of the limiting plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. In this utility model, a welding positioning device for a tunnel steel arch frame connecting plate is used. A limiting plate engages the steel arch frame, while a limiting screw limits the connecting plate, allowing for rapid alignment and connection between the steel arch frame and the connecting plate. This ensures a close and smooth connection between the steel arch frame and the connecting plate during welding. Therefore, this utility model offers high welding positioning accuracy.

[0015] 2. In this utility model, a welding positioning device for a tunnel steel arch frame connecting plate is provided. By setting a baffle, after the limiting plate is connected to the steel arch frame, the steel arch frame is further limited by inserting the baffle, thereby making the limiting plate relatively stable and achieving high positioning accuracy during the installation of the connecting plate. By setting a pull rod, the baffle can be easily and quickly removed after welding, making it convenient to use. Therefore, this utility model has a simple structure, high positioning accuracy, and is easy to use.

[0016] 3. In this utility model, a welding positioning device for connecting plates of tunnel steel arch frames, when the connecting plate is inserted into the limiting screw, the limiting nut can be screwed in to limit the front and rear directions of the connecting plate, thereby making the welding process more stable. By providing a handle, the positioning device can be easily removed from the steel arch frame after welding, thus facilitating the reuse of the device. Therefore, this utility model is convenient to use and has high positioning accuracy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a cross-sectional schematic diagram of the limiting plate and steel arch frame in this utility model.

[0019] Figure 3 This is a cross-sectional schematic diagram of the limiting plate in this utility model.

[0020] In the diagram: 1. Steel arch frame; 2. Limiting plate; 21. Slot; 22. Positioning groove; 23. Mounting hole; 3. Limiting screw; 4. Limiting nut; 5. Baffle; 6. Handle; 7. Connecting plate; 8. Pull rod. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1:

[0023] See Figures 1 to 3 A welding positioning device for a connecting plate of a tunnel steel arch frame includes a limiting plate 2 and multiple limiting screws 3. The limiting plate 2 is U-shaped and is located at one end of the steel arch frame 1, with its inner sidewall abutting against the flange of the I-beam of the steel arch frame 1. One side of the limiting plate 2 is abutting against the side of the connecting plate 7 near the steel arch frame 1. The multiple limiting screws 3 correspond one-to-one with multiple bolt holes on the connecting plate 7. One end of each limiting screw 3 passes through a bolt hole on the connecting plate 7 and is connected to one side of the limiting plate 2.

[0024] In this embodiment, the limiting plate 2 is made of a 20cm thick steel plate, which is cut into shape using a plasma cutting machine; the limiting screw 3 is made of a 22cm diameter round steel bar, which is inserted into the I-beam of the steel arch frame 1 through the limiting plate 2, so that the limiting plate 2 is placed at the end of the I-beam. The limiting plate 2 and the I-beam should be in close contact. Then, the bolt holes on the connecting plate 7 are inserted into the limiting screw 3. After the connecting plate 7 is in close contact with the end of the I-beam, the connecting plate 7 and the I-beam are initially spot welded and fixed by electric welding. After the fixing is completed, the device is removed, and finally all welding work is completed.

[0025] Example 2:

[0026] The basic content is the same as in Example 1, except that:

[0027] See Figure 1 and Figure 2 A baffle 5 is movably installed on the upper side of the limiting plate 2. One side of the baffle 5 abuts against the wing plate of the I-beam of the steel arch frame 1. A slot 21 is provided on the upper side wall of the limiting plate 2, and the upper side of the baffle 5 is inserted into the slot 21. A positioning groove 22 is provided on the lower side wall of the limiting plate 2, and the lower side of the baffle 5 is inserted into the positioning groove 22. A pull rod 8 is connected to the upper side of the baffle 5.

[0028] In this embodiment, the slot 21 and the positioning groove 22 can be adjusted according to the actual size of the I-beam of the steel arch frame 1. The limiting plate 2 is inserted from one side of the I-beam until the flange of the I-beam is in contact with the inner bottom wall of the limiting plate 2. Then, the baffle 5 is inserted into the slot 21 and simultaneously inserted into the positioning groove 22. After welding is completed, the baffle 5 is removed by the pull rod 8.

[0029] Example 3:

[0030] The basic content is the same as in Example 1, except that:

[0031] See Figure 1 and Figure 3The limiting screw 3 is threaded with a limiting nut 4, which abuts against the side of the connecting plate 7 away from the steel arch frame 1. The limiting plate 2 has an installation hole 23, and one end of the limiting screw 3 is connected to the installation hole 23.

[0032] In this embodiment, the diameter of the limiting screw 3 and the spacing of the mounting holes 23 can be adjusted according to requirements. The external thread size of the limiting screw 3 should be smaller than the size of the bolt holes on the connecting plate 7. The limiting screw 3 can be connected to the limiting plate 2 by plugging in or by welding.

[0033] Example 4:

[0034] The basic content is the same as in Example 1, except that:

[0035] See Figure 1 and Figure 2 The upper side of the limiting plate 2 is connected to a handle 6, which is inverted U-shaped, and the two side walls of the handle 6 are connected to the upper side of the limiting plate 2.

[0036] In this embodiment, the handle 6 is made of 10cm diameter round steel as the main material and is welded to the limiting plate 2.

Claims

1. A welding and positioning device for connecting plates of tunnel steel arch frames, characterized in that: The device includes a limiting plate (2) and multiple limiting screws (3). The limiting plate (2) is U-shaped and is located at one end of the steel arch frame (1). Its inner sidewall is in contact with the flange of the I-beam of the steel arch frame (1). One side of the limiting plate (2) is in contact with the side of the connecting plate (7) near the steel arch frame (1). The multiple limiting screws (3) correspond one-to-one with the multiple bolt holes on the connecting plate (7). One end of the limiting screw (3) passes through the bolt hole on the connecting plate (7) and is connected to one side of the limiting plate (2).

2. The welding and positioning device for connecting plates of tunnel steel arch frames according to claim 1, characterized in that: A baffle (5) is movably installed on the upper side of the limiting plate (2), and one side of the baffle (5) abuts against the wing plate of the I-beam of the steel arch frame (1).

3. The tunnel steel arch frame connecting plate welding positioning device according to claim 2, characterized in that: The upper side wall of the limiting plate (2) is provided with a slot (21), and the upper side of the baffle (5) is inserted into the slot (21).

4. The welding and positioning device for connecting plates of tunnel steel arch frames according to claim 2, characterized in that: The lower side wall of the limiting plate (2) is provided with a positioning groove (22), and the lower side of the baffle (5) is inserted into the positioning groove (22).

5. The welding and positioning device for connecting plates of tunnel steel arch frames according to claim 3, characterized in that: A pull rod (8) is connected to the upper side of the baffle (5).

6. The welding and positioning device for connecting plates of tunnel steel arch frames according to claim 1, characterized in that: The limiting screw (3) is threaded with a limiting nut (4), which abuts against the side of the connecting plate (7) away from the steel arch frame (1).

7. The welding and positioning device for connecting plates of tunnel steel arch frames according to claim 1, characterized in that: The limiting plate (2) has an installation hole (23), and one end of the limiting screw (3) is connected to the installation hole (23).

8. The welding and positioning device for connecting plates of tunnel steel arch frames according to claim 1, characterized in that: A handle (6) is connected to the upper side of the limiting plate (2).

9. A welding positioning device for a tunnel steel arch frame connecting plate according to claim 8, characterized in that: The handle (6) is inverted U-shaped, and the two side walls of the handle (6) are connected to the upper side of the limiting plate (2).

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