Folding type tunnel steel arch quick splicing device

Abstract

The utility model discloses a folding type tunnel steel arch quick splicing device, and belongs to the technical field of tunnel construction. The folding type tunnel steel arch rapid splicing device is characterized by comprising an installation platform and electric lifting tables, the installation platform is of a rectangular frame structure, at least three electric lifting tables are correspondingly arranged on two opposite frame edges of the installation platform respectively, each electric lifting table comprises a fixed end and a movable end, and the fixed ends are connected with the movable ends. The fixed end of the electric lifting table is fixedly connected with the frame edge of the installation platform, an installation table top is fixed to the upper portion of the movable end of the electric lifting table, an obliquely-arranged connecting plate is fixed to the installation table top, and bolt holes are formed in the connecting plate. According to the utility model, the distance and the gradient among the multiple steel arches can be conveniently adjusted, and the connecting ribs among the arch crown section, the arch waist section and the arch lower section of the multiple steel arches can be quickly assembled and welded in a factory.

Description

Technical Field

[0001] The utility model relates to a foldable tunnel steel arch frame quick splicing device, which is mainly used for splicing tunnel steel arch frames and belongs to the technical field of tunnel construction. Background Art

[0002] Tunnel construction in complex environments places higher demands on construction equipment and technology. The adoption of large-scale mechanized construction is an inevitable trend in tunnel engineering development. After tunnel excavation, steel arches must be erected quickly to prevent tunnel deformation. As the primary load-bearing structure, the speed of their installation not only impacts project progress but also directly affects the safety of the tunnel structure. Steel arch installation is an essential step in tunnel construction, but currently, it is mostly done manually on-site, making rapid assembly impossible.

[0003] In order to solve the problem of rapid assembly of tunnel steel arch frames, some technicians have proposed a foldable tunnel steel arch frame. The steel arch frame is divided into sections, and the corresponding sections of multiple steel arch frames are pre-assembled in the factory. The pre-assembled multiple arch top sections and pre-assembled multiple arch waist sections are hinged by hinge shafts and can be folded for easy transportation. After the multiple steel arch frame sections pre-assembled in the factory are transported to the site, they are installed by construction machinery to complete the rapid erection of multiple steel arch frames. At present, when pre-assembling steel arch frames in the factory, simple tooling is mostly used for assembly. During assembly, the spacing and slope between the steel arch frames cannot be quickly adjusted, the assembly process is cumbersome, and the work efficiency is low. Utility Model Content

[0004] In view of the above-mentioned defects in the prior art, the utility model provides a foldable tunnel steel arch frame rapid splicing device suitable for rapid assembly of steel arch frames in a factory, which is easy to adjust and can improve work efficiency.

[0005] The utility model is realized through the following technical scheme: a foldable tunnel steel arch frame rapid splicing device, which is characterized in that: it includes a mounting platform and an electric lifting platform, the mounting platform is a rectangular frame structure, and at least three electric lifting platforms are respectively arranged on two opposite frame edges of the mounting platform, and the electric lifting platform includes a fixed end and a movable end, the fixed end of the electric lifting platform is fixedly connected to the frame edge of the mounting platform, and the upper part of the movable end of the electric lifting platform is fixed with a mounting table, and an inclined connecting plate is fixed on the mounting table, and bolt holes are arranged on the connecting plate.

[0006] In the present invention, the distance between the frame edges of the two connected electric lift platforms of the installation platform is adapted to the cross-sectional dimensions of the tunnel steel arch frame, and the distance between two adjacent electric lift platforms on the frame edge of the installation platform is the same as the design spacing of the two adjacent steel arch frames. The connecting plate on the installation surface of the electric lift platform is used to connect with the steel arch frame to be assembled, and the electric lift platform can be raised and lowered. The slope between the steel arch frames can be adjusted by raising and lowering the electric lift platform to meet the design requirements. The present invention can be used to quickly complete the splicing of the top sections of multiple steel arch frames, the waist sections of multiple steel arch frames, and the lower sections of multiple steel arch frames in the factory.

[0007] Furthermore, a plurality of electric lift fixing positions are provided on the frame edge of the mounting platform connected to the electric lift. By selecting the fixing positions of the electric lift, the distance between the steel arches can be quickly adjusted.

[0008] Furthermore, the installation platform is made of I-beam.

[0009] Furthermore, in order to facilitate the installation and movement of the electric lift platform, the fixed end of the electric lift platform is connected to the frame edge of the installation platform by bolts.

[0010] The beneficial effects of the utility model are as follows: the utility model has a simple structure and is easy to operate. By adjusting the installation position of the electric lifting platform on the installation frame and adjusting the lifting height of the electric lifting platform, the spacing and slope adjustment between multiple steel arch frames can be easily achieved. The connecting ribs between the arch top section, arch waist section and arch lower section of multiple steel arch frames can be quickly assembled and welded in the factory. The operation is simple and the assembly is convenient, which can greatly improve the assembly speed of the steel arch frames. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic structural diagram of the foldable tunnel steel arch quick splicing device in the utility model;

[0012] Figure 2 It is a side view of the installation frame in the utility model;

[0013] Figure 3 This is a schematic diagram of the main view of the electric lifting platform in the utility model;

[0014] Figure 4 It is a top view schematic diagram of the electric lifting platform in the utility model;

[0015] Figure 5 It is a side view schematic diagram of the electric lifting platform in the utility model;

[0016] Figure 6 This is a schematic diagram of the transmission structure of the electric lifting platform in the utility model;

[0017] Figure 7is Figure 6 A-A cross-sectional view in Fig.

[0018] Figure 8 is the connection diagram of multiple steel arch frame vault segments;

[0019] Figure 9 is the folding diagram of steel arch frame;

[0020] Figure 10 is the splicing diagram of multiple steel arch frames (vault segment, two haunch segments);

[0021] In the figure, 1 is a mounting platform, 2 is an electric lifting platform, 4 is a vault segment of a steel arch frame, 5 is a hinge shaft, 6 is a haunch segment of a steel arch frame, 7 is a connecting rib, and 8 is a connecting plate of a steel arch frame.

[0022] 1.1 is a bolt hole.

[0023] 2.1 is a mounting table, 2.2 is a connecting plate, 2.3 is a stand column, 2.4 is a bolt hole, 2.5 is a motor reducer, 2.6 is a transmission shaft, 2.7 is a shaft coupling, 2.8 is a worm gear screw rod elevator, 2.9 is a mounting frame, and 2.10 is a mounting plate.

[0024] 2.3.1 is a movable joint of a stand column, and 2.3.2 is a fixed joint of a stand column.

[0025] 2.8.1 is a lifting screw rod of a worm gear screw rod elevator. DETAILED DESCRIPTION

[0026] The utility model will be further described below through non-restrictive examples and in combination with the drawings:

[0027] As shown in the accompanying drawings, a foldable tunnel steel arch rapid splicing device includes an installation platform 1 and an electric lift platform 2. The installation platform 1 is a rectangular frame structure made of I-beams. At least three electric lift platforms 2 are respectively installed on two opposite frame edges of the installation platform 1. The electric lift platforms 2 include a fixed end and a movable end. The fixed end of the electric lift platform 2 is fixedly connected to the frame edge of the installation platform 1. The movable end of the electric lift platform 2 is fixed to the upper portion of the mounting table 2.1. The mounting table 2.1 is fixed to an inclined connecting plate 2.2, and the connecting plate 2.2 is provided with bolt holes 2.4. The lifting mechanism of the electric lifting platform 2 in the present invention is the existing technology. The lifting mechanism used in this embodiment is a worm gear screw lift. A hollow column 2.3 is provided at each of the four corners of the lower part of the mounting table 2.1 of the electric lifting platform 2.3. Each column 2.3 includes a fixed section 2.3.2 at the lower part and a movable section 2.3.1 at the upper part. The movable section 2.3.1 is set in the fixed section 2.3.2. The upper ends of the four movable sections 2.3.1 are fixedly connected to the mounting table 2.1. A set of worm gear screw lifts 2.8 is provided in each column 2.3. The fixed end of the worm gear screw lift is fixed on the mounting frame 2.9, and the mounting frame 2.9 is fixed in the fixed section 2.3.2 of the column 2.3. The upper end of the lifting screw 2.8.1 of the worm gear screw lift is connected to the mounting table 2.1, and the other end is a movable end. Each of the two columns 2.3 uses a motor reducer 2.5 to drive the worm gear elevator 2.8 within. The motor reducer 2.5 is fixedly mounted on the mounting plate 2.10 between the two columns 2.3 and has dual output shafts. The two output shafts of the motor reducer 2.5 are connected to the input shaft of the worm gear elevator 2.8 via a transmission shaft 2.6 and a coupling 2.7. The two motor reducers 2.5 can drive the movable ends of the four columns to move upward and downward. The side walls of the movable joint are provided with strip grooves to prevent interference with the mounting bracket 2.9 and the input shaft of the worm gear elevator. The worm gear elevator 2.8 and the motor reducer 2.5 are both existing technologies and can be purchased commercially. Of course, the structure of the electric lift platform in this utility model can also adopt other structural forms.

[0028] To facilitate adjustment of the distance between the electric lift platforms 2, the frame edge of the mounting platform 1, to which the electric lift platforms 2 are connected, is provided with multiple mounting locations for the electric lift platforms. The mounting location of the electric lift platforms 2 on the mounting frame can be selected as needed. In this embodiment, the electric lift platforms 2 are secured to the frame edge of the mounting platform 1 using bolts. The frame edge of the mounting platform 1 is provided with multiple bolt holes 1.1 for connecting the electric lift platforms 2.

[0029] The folding tunnel steel arch frame is composed of multiple steel arch frames connected by a number of connecting ribs 7. Each steel arch frame is divided into 5 sections, including a crown section 4, two left and right arch waist sections 6, and two left and right arch lower sections. The two arch waist sections 6 of each steel arch frame are hinged to the two ends of the crown section 4 through hinge shafts 5 respectively. The connecting ends of each section of the steel arch frame are welded with connecting plates 8, and the hinge shafts 5 are connected to the connecting plates 8. Bolt holes are provided on the connecting plates 8. In the factory, the folding tunnel steel arch frame rapid splicing device described above can be used to complete the welding of the connecting reinforcement of the arch crown section of multiple steel arch frames, the connecting reinforcement welding of the arch waist section of multiple steel arch frames, and the connecting reinforcement welding of the arch lower section of multiple steel arch frames: first, the arc shape and segment length of the arch frame are designed according to the design drawings, and a single-section steel arch frame of the required size is processed; when welding the connecting reinforcement of the arch crown section of multiple steel arch frames, the fixed position and lifting height of the corresponding electric lifting platform 2 are adjusted according to the spacing and slope of the steel arch frames to be assembled, and the two ends of the arch crown section of the multiple steel arch frames to be assembled are fixedly connected to the corresponding connecting plates 2.2 on the electric lifting platform 2, and then the connecting reinforcement between the steel arch frames is welded according to the designed spacing. , complete the assembly of the arch top sections of multiple steel arch frames; when welding the connecting reinforcements of the arch waist sections of multiple steel arch frames, fix the lower ends of the arch waist sections of the multiple steel arch frames to be assembled to the connecting plates 2.2 on the corresponding electric lifting platforms 2, review the lifting height of each electric lifting platform 2, and then weld the connecting reinforcements between the steel arch frames according to the designed spacing to complete the assembly of the arch waist sections of multiple steel arch frames; when welding the connecting reinforcements of the arch lower sections of multiple steel arch frames, fix the lower ends of the arch lower sections of the multiple steel arch frames to be assembled to the connecting plates 2.2 on the corresponding electric lifting platforms 2, review the lifting height of each electric lifting platform, and then weld the connecting reinforcements between the steel arch frames according to the designed spacing to complete the assembly of the arch lower sections of multiple steel arch frames.

[0030] The crown section and two waist sections of the assembled multiple steel arch frames can be hingedly connected after welding the hinge shaft 5 in the factory, so as to be conveniently folded and transported.

[0031] After the pre-assembled multiple steel arch frames are transported to the work surface by transportation equipment, they can be erected using construction machinery, which can complete the rapid erection of multiple steel arch frames and speed up the construction progress.

[0032] The utility model has a simple structure. By adjusting the installation position of the electric lifting platform on the installation frame and adjusting the lifting height of the electric lifting platform, the spacing and slope adjustment between multiple steel arch frames can be conveniently achieved. The connecting reinforcements between the arch top section, arch waist section and arch lower section of multiple steel arch frames can be quickly assembled and welded, with fast assembly speed and high work efficiency.

[0033] The other parts of this embodiment are all existing technologies and will not be described in detail here.

Claims

1. A foldable tunnel steel arch rapid splicing device, characterized by: It includes a mounting platform and an electric lifting platform. The mounting platform is a rectangular frame structure. At least three electric lifting platforms are respectively arranged on two opposite frame edges of the mounting platform. The electric lifting platform includes a fixed end and a movable end. The fixed end of the electric lifting platform is fixedly connected to the frame edge of the mounting platform. The upper part of the movable end of the electric lifting platform is fixed with a mounting table, and an inclined connecting plate is fixed on the mounting table, and bolt holes are arranged on the connecting plate.

2. The foldable tunnel steel arch rapid splicing device according to claim 1 is characterized by: A plurality of electric lift platform fixing positions are arranged on the frame edge of the installation platform connected to the electric lift platform.

3. The foldable tunnel steel arch rapid splicing device according to claim 1 is characterized by: The installation platform is made of I-beam.

4. The foldable tunnel steel arch rapid splicing device according to claim 1, 2 or 3, characterized in that: The fixed end of the electric lifting platform is connected to the frame edge of the mounting platform with bolts.

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