Tunnel steel arch frame pre-arch precision control processing device

Abstract

The utility model provides a kind of tunnel steel arch support pre-arch precision control processing device, including bottom plate, limiting component and positioning assembly, the both ends of bottom plate are symmetric and detachably equipped with mounting plate, the top of each mounting plate is equipped with mounting block, the both sides of each mounting block are equipped with the first sliding slot, the first sliding block is slidably equipped in each first sliding slot, the end of each first sliding block away from mounting groove is extended mounting groove after being equipped with support plate by connecting column hingedly, each mounting block is equipped with driving assembly, limiting component is detachably arranged on the top of bottom plate, limiting component is used to limit the position of steel arch support, positioning assembly is used to position the connecting plate placed on support plate, it solves the problem that the connecting plate is connected with the connecting plate of other steel arch support after being welded with steel arch support end face due to the deviation of steel arch support size in prior art, and the connecting plate is skewed, affect the quality of support structure after splicing.

Description

Technical Field

[0001] This utility model relates to the field of steel arch frame processing technology, and in particular to a processing device for controlling the pre-arching accuracy of tunnel steel arch frames. Background Technology

[0002] In the design of composite lining tunnels in China, steel arch frames are often used. They are suitable for strong support of the surrounding rock to ensure its stability. The closer the initial support steel frame is to the surrounding rock, the better the support effect. The model, specifications, and geometric dimensions of the steel frame should meet the design requirements, and its shape should be adapted to the excavation section.

[0003] The steel frame is fabricated using a cold bending method. During the cold bending process, the I-beams are subjected to both bending and shear forces, resulting in a cold bending degree. The magnitude of the cold bending degree depends on various factors, including the size and material of the I-beams, the I-beam joints, and the parameters of the cold bending equipment. It often deviates from the designed bending radius. The two ends of the steel arch frame are welded with connecting plates perpendicular to the end faces of the steel arch frame. The steel arch frame is connected to another steel arch frame via these connecting plates. However, due to the difference in bending radii, the connecting plates at the connection points of two steel arch frames often misalign, resulting in skewness. This error is amplified, especially when connecting multiple sections of steel arch frames. Consequently, the connection, verticality, elevation control, and lateral deviation during steel frame installation often fail to meet quality requirements. This significantly impacts the load-bearing structure of the steel arch frame, leading to problems such as initial support deformation and cracking, increasing the risks of tunnel construction. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a tunnel steel arch frame pre-arch precision control processing device, which solves the problem in existing technologies where, during the welding of steel arch frames and connecting plates, the dimensional deviation of the steel arch frame itself causes the connecting plate to be skewed when connected to other steel arch frame connecting plates after welding, thus affecting the quality of the assembled support structure.

[0005] According to an embodiment of this utility model, a tunnel steel arch frame pre-arch precision control processing device includes a base plate, a limiting component, and a positioning component. The base plate has symmetrically and detachably mounted mounting plates at both ends. Each mounting plate has a mounting block on its top. Each mounting block has a first sliding groove on both sides. A first slider is slidably mounted in each first sliding groove. The end of each first slider away from the mounting groove extends out of the groove and is hinged to a support plate via a connecting column. Each mounting block has a driving component for driving the corresponding first slider to move within the first sliding groove. The limiting component is detachably mounted on the top of the base plate and is used to limit the position of the steel arch frame. Each support plate has a positioning component for positioning the connecting plate placed on the support plate.

[0006] Compared with the prior art, this utility model has the following advantages: By pre-defining the distance between two support plates, the steel arch frame to be welded is placed on the base plate and then limited by the limiting component. Then, the tilt angle of the support plate is adjusted by driving the first slider through the driving component. The connecting plate to be installed is in close contact with the support plate, so that the connecting plate is at the required tilt angle. Thus, the two ends of the steel arch frame are welded to the two connecting plates respectively with the connecting plate as the positioning plate. This ensures that there will be no joint seam when the connecting plate of the steel arch frame is connected to the connecting plate of another steel arch frame. Therefore, there is no need to manually adjust the position of the connecting plate of the steel arch frame to achieve the specified curvature, which reduces the adjustment time required during the installation of the steel arch frame, while ensuring that the steel arch frame can play the required force-bearing role.

[0007] Furthermore, each drive assembly includes: a first lead screw, which is horizontally and rotatably disposed in the mounting groove, and the first lead screw is threadedly connected to a corresponding first slider in the mounting groove. One end of each first lead screw extends out of the mounting groove and is provided with a first rotating handle.

[0008] Furthermore, the positioning component includes: a positioning strip, a second slide groove on each mounting plate, a second slider slidably disposed in each second slide groove, a positioning strip at the end of the second slider away from the second slide groove, a second lead screw rotatably disposed in the second slide groove, the second lead screw being threadedly connected to the second slider, and a second rotating handle at one end of the second lead screw after it passes through the second slide groove.

[0009] Furthermore, the base plate has several threaded holes, and the mounting plate can be detachably connected to the threaded holes on the base plate by bolts.

[0010] Furthermore, the limiting component includes: a connecting platform, which is detachably mounted on the base plate, with a threaded screw threaded through the horizontal connecting platform, and a third rotating handle at the end of the screw away from the base plate.

[0011] Furthermore, each screw has an arc-shaped surface at the end furthest from the third shank.

[0012] Furthermore, each support plate is equipped with an extension plate at its top, and an angle measuring instrument is mounted on the extension plate. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0014] Figure 2 This is a top view of an embodiment of the present utility model.

[0015] Figure 3 This is a schematic diagram of the installation of the drive component according to an embodiment of the present invention.

[0016] Figure 4 This is a front view of the driving component according to an embodiment of the present utility model.

[0017] Figure 5 This is a schematic diagram of the positioning component structure according to an embodiment of the present utility model.

[0018] In the above figures: 1. Base plate; 2. Mounting plate; 3. Mounting block; 4. First slider; 5. Connecting column; 6. Support plate; 7. First lead screw; 8. First rotating handle; 9. Positioning strip; 10. Second slider; 11. Second lead screw; 12. Second rotating handle; 13. Threaded hole; 14. Connecting platform; 15. Screw; 16. Third rotating handle; 17. Arc-shaped surface; 18. Extension plate; 19. Angle measuring instrument. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0020] like Figures 1 to 3As shown in the figure, this utility model embodiment proposes a tunnel steel arch frame pre-arch precision control processing device, including a base plate 1, a limiting component, and a positioning component. The base plate 1 is symmetrically and detachably provided with mounting plates 2 at both ends. Each mounting plate 2 is provided with a mounting block 3 on its top. Each mounting block 3 is provided with a first sliding groove on both sides. A first slider 4 is slidably provided in each first sliding groove. The end of each first slider 4 away from the mounting groove extends out of the mounting groove and is hinged to a support plate 6 through a connecting column 5. Each mounting block 3 is provided with a driving component for driving the corresponding first slider 4 to move in the first sliding groove. The limiting component is detachably provided on the top of the base plate 1 and is used to limit the position of the steel arch frame. Each support plate 6 is provided with a positioning component and is used to position the connecting plate placed on the support plate 6. When welding the steel arch frame and the connecting plate, the steel arch frame to be welded is placed flat on the base plate 1 between two mounting blocks 3. The distance between the two mounting blocks 3 and the tilt angle of each support plate 6 are pre-adjusted. The position of the steel arch frame is limited and fixed by the limiting component. Then, the connecting plate is placed on the side of each support plate 6 so that the two ends of the steel arch frame abut against the support plate 6. The tilt angle of the support plate 6 is readjusted, and then the steel arch frame and the support plate 6 are welded. Specifically, the connecting column 5 and the support plate 6 are connected by a ball joint. When adjusting the tilt angle of the support plate 6, the drive component is activated, which pushes the corresponding first slider 4 to move. As needed, the two first sliders 4 on the same mounting block 3 can move one after the other, thereby tilting the corresponding support plate 6. The required tilt angle of the support plate 6 is calculated according to the actual needs, and its size is related to the number of steel arch frames to be connected on site and the bending radius of the steel arch frames. Preferably, a scale can be set on the top of the base plate 1 to facilitate the adjustment of the position of the two mounting blocks 3. It should be noted that when it is necessary to connect the end of the steel arch frame to the middle of the square connecting plate, a pad can be placed under the steel arch frame. For different height requirements, pads of the required height can be made separately.

[0021] This device pre-defines the distance between two support plates 6, and then adjusts the tilt angle of the support plates 6, using the connecting plate as a positioning point, to weld the steel arch frame onto the connecting plate. This differs from the traditional method of directly welding the connecting plate perpendicular to the end face of the steel arch frame. This ensures that there will be no seam when the steel arch frame is connected to the connecting plate of another steel arch frame, thus eliminating the need for manual adjustment of the position of the steel arch frame connecting plate to achieve the specified curvature, reducing the installation time of the steel arch frame, and ensuring that the steel arch frame can play the required load-bearing role.

[0022] like Figure 3 and Figure 4As shown, each driving component further includes: a first lead screw 7, which is horizontally and rotatably disposed in the mounting groove. The first lead screw 7 is threadedly connected to a corresponding first slider 4 in the mounting groove. One end of each first lead screw 7 extends out of the mounting groove and is provided with a first rotating handle 8. When adjusting the movement of the corresponding first slider 4, the rotating handle is rotated, which drives the first lead screw 7 to rotate. The rotation of the first lead screw 7 drives the first slider 4 threadedly connected to it to move in the sliding groove. In this embodiment, it is necessary to adjust the inner side of the support plate 6 to tilt towards the steel arch frame and the outer side of the support plate 6 to tilt towards the end of the base plate 1. At this time, the first slider 4 located on the inner side moves towards the steel arch frame, and the first slider 4 located on the outer side moves towards the end of the base plate 1.

[0023] like Figure 5 As shown, the positioning component further includes: a positioning strip 9; a second slide groove is provided on each mounting plate 2; a second slider 10 is slidably provided in each second slide groove; the positioning strip 9 is provided at the end of the second slider 10 away from the second slide groove; a second lead screw 11 is rotatably provided in the second slide groove; the second lead screw 11 is threadedly connected to the second slider 10; one end of the second lead screw 11 extends out of the second slide groove and is provided with a second rotating handle 12. By turning the second rotating handle 12, the second lead screw 11 is driven to rotate, and the second lead screw 11 drives the second slider 10, which is threadedly connected to it, to move in the second slide groove, thereby changing the position of the positioning strip 9 on the support plate 6, adapting to the positioning of connecting plates of different specifications and models. During the welding operation of the steel arch frame and the connecting plate, welding operations are generally carried out in small batches. To facilitate processing, the positioning strip 9 is used to position one side of the connecting plate to be welded, while the other side of the connecting plate to be welded can be referenced to the base plate 1, facilitating batch welding operations and improving production efficiency.

[0024] like Figure 1 As shown, furthermore, the base plate 1 has several threaded holes 13, and the mounting plate 2 is detachably connected to the threaded holes 13 on the base plate 1 by bolts. The base plate 1 has threaded holes 13 at equal intervals; to adjust the position of the mounting plate 2 and the mounting block 3, simply release the bolts. The position adjustment of the mounting plate 2 is stepped. When the support plate 6 supports the connecting plate, if the connecting plate does not reach a position where it is tightly against the steel arch frame, this distance can be compensated by simultaneously driving the first sliders 4 on both sides of the same mounting block 3 to move in the same direction.

[0025] like Figures 1 to 2As shown, the limiting component further includes a connecting platform 14, which is detachably mounted on the base plate 1. A screw 15 is threadedly threaded onto the connecting platform 14, and a third rotating handle 16 is provided at the end of the screw 15 away from the base plate 1. Specifically, the connecting platform 14 is also threadedly connected to the base plate 1 through a threaded hole 13 on the base plate 1. By rotating the third rotating handle 16, the screw 15 is rotated. By screwing the screw 15 into or out of the connecting platform 14, the position of the steel arch frame when it abuts the end of the screw 15 is adjusted, thereby achieving the purpose of positioning the steel arch frame and facilitating batch operations.

[0026] like Figure 2 As shown, furthermore, each screw 15 has an arc-shaped surface 17 at the end away from the third rotating handle 16. The arc-shaped surface 17 at the end of the screw 15 helps to fit the arc shape of the steel arch frame, thus adapting to the arc structure of the steel arch frame.

[0027] like Figure 1 and Figure 2 As shown, each support plate 6 is further provided with an extension plate 18 at its top, and an angle measuring instrument 19 is provided on the extension plate 18. Specifically, the angle measuring instrument 19 is existing technology and is an angle measuring instrument 19 capable of measuring the rotation angle, thereby controlling the tilt angle of the support plate 6 and adjusting the tilt angle of the support plate 6 to the required angle.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A machining device for controlling the pre-arching accuracy of tunnel steel arch frames, characterized in that, include: The base plate (1) has mounting plates (2) symmetrically and detachably provided at both ends. Each mounting plate (2) has a mounting block (3) on its top. Each mounting block (3) has a first sliding groove on both sides. Each first sliding groove has a first slider (4) slidably provided in it. Each first slider (4) extends out of the mounting groove and is hinged to a support plate (6) via a connecting column (5). Each mounting block (3) has a driving component for driving the corresponding first slider (4) to move in the first sliding groove. A limiting component is detachably mounted on the top of the base plate (1) and is used to limit the position of the steel arch frame. Positioning components are provided on each support plate (6), which are used to position the connecting plate placed on the support plate (6).

2. The tunnel steel arch frame pre-arch accuracy control processing device as described in claim 1, characterized in that, Each drive assembly includes: a first lead screw (7), which is horizontally and rotatably disposed in the mounting groove. The first lead screw (7) is threadedly connected to the corresponding first slider (4) in the mounting groove. One end of each first lead screw (7) extends out of the mounting groove and is provided with a first rotating handle (8).

3. The tunnel steel arch frame pre-arching accuracy control processing device as described in claim 2, characterized in that: The positioning component includes: a positioning strip (9), a second slide groove is provided on each mounting plate (2), a second slider (10) is slidably provided in each second slide groove, a positioning strip (9) is provided at the end of the second slider (10) away from the second slide groove, a second lead screw (11) is rotatably provided in the second slide groove, the second lead screw (11) is threadedly connected to the second slider (10), and a second rotating handle (12) is provided at one end of the second lead screw (11) after it passes through the second slide groove.

4. The tunnel steel arch frame pre-arching accuracy control processing device as described in claim 1, characterized in that: The base plate (1) has several threaded holes (13), and the mounting plate (2) is detachably connected to the threaded holes (13) on the base plate (1) by bolts.

5. The tunnel steel arch frame pre-arching accuracy control processing device as described in claim 1, characterized in that, The limiting component includes: a connecting platform (14), which is detachably mounted on the base plate (1). A screw (15) is threaded through the connecting platform (14) horizontally, and a third handle (16) is provided at the end of the screw (15) away from the base plate (1).

6. The tunnel steel arch frame pre-arching accuracy control processing device as described in claim 5, characterized in that, Each screw (15) has an arc-shaped surface (17) at the end away from the third shank (16).

7. The tunnel steel arch frame pre-arching accuracy control processing device as described in claim 1, characterized in that: Each support plate (6) has an extension plate (18) on its top, and an angle measuring instrument (19) is provided on the extension plate (18).

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