Quick connecting structure for multiple arch frames

Abstract

The utility model provides a quick connecting structure for multiple arch frames, and relates to the field of tunnel construction. The arch frame is composed of two arch foot sections, two side arch sections and a top arch section. A connecting plate A used for connecting the side arch sections is welded on a web plate of the top arch section, and a positioning pin and a plurality of connecting holes are arranged on the connecting plate A; connecting plates B used for being connected with the arch foot sections are welded to webs of the side arch sections, and a plurality of long-strip-shaped holes used for adjusting the installation heights of the arch foot sections are formed in the connecting plates B; the quick arch frame connecting structure comprises a connecting rod, two ends of the connecting rod are provided with bends, and two ends of a positioning pin are provided with radial holes for inserting the bent parts of the connecting rod. According to the utility model, the partial degree of freedom of the side arch section in a suspension state is limited by adopting a positioning mode of the positioning pin, so that the alignment of the bolt hole and the connecting hole is easy to operate. According to the utility model, quick connection of multiple arch frames can be realized, and the mounting height of the arch frames can be adjusted.

Description

Technical Field

[0001] This utility model is specifically a quick connection structure for multiple arch frames, relating to the field of tunnel construction technology. Background Technology

[0002] Arch frames are an important means of tunnel support. For ease of transport, existing arch frames are composed of three segments spliced ​​together. Before installation, the arch frames are typically assembled on a trolley, and the three arch frames are connected together by welding steel mesh. Then, a robotic arm installs the three arch frames inside the tunnel. This method of arch frame installation has the following problems:

[0003] 1. Existing arch frames typically use flange connections for splicing. Since the segments need to be lifted up for splicing, it is difficult to align the connection holes.

[0004] 2. The distance between the three arch frames is difficult to guarantee, resulting in the arch frames not being installed properly;

[0005] 3. Errors in the height of the arch frame installation base may cause the arch foot to be suspended, affecting the support effect. Utility Model Content

[0006] To overcome the shortcomings of the prior art, this utility model discloses a quick connection structure for multiple arch frames, adopting the following technical solution:

[0007] A quick-connection structure for multiple arch frames is disclosed. The arch frame consists of two arch foot segments, two side arch segments, and one top arch segment. A connecting plate A for connecting the side arch segments is welded to the web of the top arch segment. The connecting plate A has a positioning pin and multiple connecting holes. A connecting plate B for connecting the arch foot segments is welded to the web of the side arch segments. The connecting plate B has multiple elongated holes for adjusting the installation height of the arch foot segments. The connection structure includes a connecting rod with bends at both ends. Radial holes for inserting the bends of the connecting rod are provided at both ends of the positioning pin.

[0008] Further improve the technical solution: Four connection holes are provided on the connecting plate A, and the four connection holes are distributed at the four corners of the positioning pin.

[0009] Further improve the technical solution: the length of the connecting rod is 1.8-2.0 meters.

[0010] Further improve the technical solution: Four elongated holes are provided on the connecting plate B, and the four elongated holes are set vertically.

[0011] Further technical improvements: An installation plate is welded to the bottom of the arch foot segment.

[0012] Further improve the technical solution: the arc length of the side arch segment is 3-5 times the arc length of the arch foot segment.

[0013] After implementing the above technical solution, the beneficial effects of this utility model compared to the prior art are:

[0014] 1. This utility model uses a positioning pin to pre-position the side arch segment, which restricts some of the degrees of freedom of the side arch segment in the suspended state, making it easier to align the bolt holes with the connection holes.

[0015] 2. The connecting rod of this utility model has three functions: first, it serves as a fixed length to ensure the installation distance between each arch frame; second, it serves as a connector to quickly connect each arch frame together; and third, it serves as a radial pin to prevent the positioning pin from coming out of the pin hole.

[0016] 3. This utility model is provided with an arch foot segment and an elongated hole on the connecting plate B of the side arch segment, so that the installation height of the arch foot segment on the mounting base can be adjusted by bolts and nuts. Attached Figure Description

[0017] Appendix Figure 1 The diagram shown is a schematic of the splicing structure of this arch frame.

[0018] Appendix Figure 2 The diagram shown is a structural schematic of the top arch segment.

[0019] Appendix Figure 3 The diagram shown is a structural schematic of the side arch segment.

[0020] Appendix Figure 4 The diagram shown is a structural schematic of the arch foot segment.

[0021] Appendix Figure 5 The diagram shown is a structural schematic of the connecting rod.

[0022] Appendix Figure 6 The diagram shown illustrates the connection of the three arch frames.

[0023] In the attached diagram: 1. Arch frame; 11. Arch foot segment; 111. Mounting plate; 112. Bolt hole B; 12. Side arch segment; 121. Connecting plate B; 122. Long hole; 123. Pin hole; 124. Bolt hole A; 13. Top arch segment; 131. Connecting plate A; 132. Connecting hole; 133. Locating pin; 134. Radial hole; 2. Connecting rod; 21. Bending part. Detailed Implementation

[0024] The preferred embodiments of this utility model are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of this utility model and are not intended to limit the scope of protection of this utility model. It should be noted that in the description of this utility model, terms such as "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation and positional relationship, and therefore should not be construed as a limitation of this utility model. It should also be noted that in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] A rapid connection structure for multiple arch frames is disclosed, relating to the field of tunnel construction. It is primarily used to solve the problems of arch frame splicing, as well as the connection and installation between three arch frames. The composition and working principle of this invention are described in detail below.

[0026] See attached document Figure 1 The arch frame 1 has an I-shaped cross-section and is welded from an upper flange, a web, and a lower flange. Unlike existing three-segment arch frames, this arch frame 1 consists of five segments: two arch foot segments 11, two side arch segments 12, and one top arch segment 13. The two arch foot segments 11 and the two side arch segments 12 are arranged symmetrically on both sides. The arc length of the side arch segment 12 is approximately equal to the arc length of the top arch segment 13, and the arc length of the side arch segment 12 is 3-5 times the arc length of the arch foot segment 11.

[0027] See attached document Figure 2 , attached Figure 2 The diagram shown is a structural schematic of the top arch segment 13. (See attached diagram.) Figure 2 It can be seen that connecting plates A131 for connecting the side arch segments 12 are welded to both ends of the web of the top arch segment 13. A locating pin 133 and four connecting holes 132 are provided on the extended part of the connecting plate A131. The four connecting holes 132 are distributed at the four corners of the locating pin 133. In addition, a radial hole 134 is provided at each end of the locating pin 133.

[0028] See attached document Figure 3 , attached Figure 3 The diagram shown is a structural schematic of the side arch segment 12. (See attached diagram.) Figure 3It can be seen that a connecting plate B121 for connecting the arch foot segment 11 is welded to the lower part of the web of the side arch segment 12. Four elongated holes 122 for adjusting the installation height of the arch foot segment 11 are provided on the extended part of the connecting plate B121. The four elongated holes 122 are vertically arranged. A pin hole 123 and four bolt holes A124 are provided on the upper part of the web of the side arch segment 12. The pin hole 123 corresponds to the positioning pin 133 on the top arch segment 13, and the four bolt holes A124 correspond to the connecting holes 132 on the top arch segment 13.

[0029] See attached document Figure 4 , attached Figure 4 The diagram shown is a structural schematic of arch foot segment 11. (See attached diagram.) Figure 4 It can be seen that an mounting plate 111 is welded to the bottom of the arch foot segment 11, and four bolt holes B112 are provided on the web of the arch foot segment 11. The four bolt holes B112 are corresponding to the four elongated holes 122 on the side arch segment 12.

[0030] When assembling arch frame 1, first hoist the top arch segment 13 onto the trolley, then hoist the side arch segment 12, and fit the pin hole 123 onto the positioning pin 133 on the side arch segment 12 to complete the pre-positioning of the side arch segment 12. Then rotate the side arch segment 12 so that the four bolt holes A124 are aligned with the connecting holes 132 on the top arch segment 13, and use bolts and nuts to connect the side arch segment 12 and the top arch segment 13 together. Finally, lift the arch foot segment 11 and use bolts and nuts to connect the arch foot segment 11 to the side arch segment 12, completing the assembly of arch frame 1.

[0031] In existing technologies, the biggest challenge in arch frame splicing lies in the connection between segments. This is because segments are heavy and long, and have many degrees of freedom when suspended. Aligning one hole is easy, but aligning all holes and inserting bolts is difficult. This invention uses a positioning pin method to pre-position the side arch segment 12, restricting some of the degrees of freedom of the side arch segment 12 in the suspended state, making the alignment of the four bolt holes A124 with the four connecting holes 132 easier to operate.

[0032] After the arch frames are assembled, the three arch frames need to be connected together by welding steel mesh. To ensure the installation distance between the arch frames, this connection structure also includes connecting rod 2.

[0033] See attached document Figure 5 , attached Figure 5The diagram shows the structure of the connecting rod 2. The connecting rod 2 is 1.8-2.0 meters long and has bent portions 21 at both ends. The connecting rod 2 has three functions: first, it serves as a standard length to ensure the installation distance between each arch frame 1; second, it serves as a connector to quickly connect each arch frame 1 together; and third, it serves as a radial pin to prevent the positioning pin 133 from coming out of the pin hole 123.

[0034] See attached document Figure 6 , attached Figure 6 The diagram shows the connection of three arch frames. Since radial holes 134 are provided at both ends of the locating pin 133, when connecting the arch frames, the bent portions 21 at both ends of the connecting rod 2 are inserted into the radial holes 134 on adjacent arch frames to connect the three arch frames together, ensuring the installation distance between the three arch frames. Finally, a steel mesh is welded between the three arch frames.

[0035] During tunnel construction, errors in the height of the arch frame installation base are inevitable. This utility model provides an arch foot segment 11 and elongated holes 122 on the connecting plate B121 of the side arch segment 12. Therefore, the installation height of the arch foot segment 11 on the installation base can be adjusted by bolts and nuts to ensure that the arch frame can be installed smoothly.

[0036] It is worth noting that the content not described in detail in the above embodiments is prior art. It is also worth noting that any additions, subtractions, substitutions, and improvements made by those skilled in the art based on the structure and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A quick-connect structure for multiple arch frames, characterized in that: The arch frame consists of two arch foot segments, two side arch segments, and one top arch segment. A connecting plate A for connecting the side arch segments is welded to the web of the top arch segment. The connecting plate A has a positioning pin and multiple connecting holes. A connecting plate B for connecting the arch foot segments is welded to the web of the side arch segments. The connecting plate B has multiple elongated holes for adjusting the installation height of the arch foot segments. The connecting structure includes a connecting rod with bends at both ends. Radial holes for inserting the bends of the connecting rod are provided at both ends of the positioning pin.

2. The multi-arch frame quick-connection structure as described in claim 1, characterized in that: Four connection holes are provided on the connecting plate A, and the four connection holes are distributed at the four corners of the positioning pin.

3. The multi-arch frame quick-connection structure as described in claim 1, characterized in that: The length of the connecting rod is 1.8-2.0 meters.

4. The multi-arch frame quick-connection structure as described in claim 1, characterized in that: Four elongated holes are provided on the connecting plate B, and the four elongated holes are set vertically.

5. The multi-arch frame quick-connection structure as described in claim 1, characterized in that: An mounting plate is welded to the bottom of the arch foot segment.

6. The multi-arch frame quick-connection structure as described in claim 1, characterized in that: The arc length of the side arch segment is 3-5 times that of the arc length of the arch foot segment.

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