A positioning arch frame for a large diameter dome and a pre-positioning construction method

Abstract

The present application relates to the technical field of dome assembly construction, and proposes a positioning arch frame for a large diameter dome, including a bracket and a support plate mounted on the top of the bracket, the bracket is provided with a main driving assembly driving the support plate to rise and fall, the support plate is provided with limiting parts on both opposite sides, the support plate and the two groups of limiting parts form a limiting groove for the truss beam to be embedded; the support plate is also provided with a secondary driving assembly driving the two groups of limiting parts to slide along the extending direction of the limiting groove, and the limiting part is also provided with an adjusting assembly driving the truss beam to slide along the extending direction of the limiting groove. The present application has the effect of facilitating the movement of the truss beam to the designated installation position.

Description

Technical Field

[0001] The present application relates to the technical field of dome assembly construction, and in particular to a positioning arch frame for a large-diameter dome and a pre-positioning construction method. Background Art

[0002] In related technologies, such as Figure 1 As shown, the large diameter dome includes a smoke exhaust shaft ring truss 1, a ring gallery truss 2 and a lattice structure arranged between the smoke exhaust shaft ring truss 1 and the ring gallery truss 2. The smoke exhaust shaft ring truss 1 is coaxially arranged in the ring gallery truss 2 and is higher than the ring gallery truss 2. The lattice structure includes a plurality of truss beams 3 arranged between the smoke exhaust shaft ring truss 1 and the surrounding railing truss. Both ends of the truss beams 3 are respectively connected between the ring gallery truss 2 and the smoke exhaust shaft ring truss 1, and a plurality of connecting rods 31 are tension-connected between adjacent truss beams 3.

[0003] When constructing the lattice shell structure of a large-diameter dome, first set up a frame to support the smoke exhaust shaft ring truss and the ring gallery truss. After assembling the smoke exhaust shaft ring truss and the ring gallery truss on the frame, use a truck crane to lift the truss beam between the smoke exhaust shaft ring truss and the ring gallery truss, and weld and fix the two ends of the truss beam to the smoke exhaust shaft ring truss and the ring gallery truss. Finally, weld connecting rods between adjacent truss beams to realize the assembly construction of the lattice shell structure.

[0004] Regarding the above-mentioned related technologies, affected by environmental factors such as wind, the truss beam is prone to shaking during the lifting process, which requires construction workers to make repeated adjustments before moving the truss beam to the designated installation position. This makes the construction difficult and affects the overall construction progress of the large-diameter dome. Summary of the invention

[0005] In order to facilitate the assembly construction of large-diameter dome truss beams, the present application provides a positioning arch frame for a large-diameter dome and a pre-positioning construction method.

[0006] The present application provides a positioning arch frame and pre-positioning construction method for a large diameter dome, which adopts the following technical solutions:

[0007] A positioning arch frame for a large-diameter dome includes a bracket and a support plate mounted on the top of the bracket, the bracket is provided with a main driving component for driving the support plate to rise and fall, limiting parts are provided on opposite sides of the support plate, and the support plate and the two groups of limiting parts form a limiting groove for a truss beam to be embedded in; the support plate is also provided with a secondary driving component for driving the two groups of limiting parts to slide in a direction perpendicular to the extension direction of the limiting groove, and the limiting part is also provided with an adjusting component for driving the truss beam to slide in the extension direction of the limiting groove.

[0008] By adopting the above technical scheme, when constructing the truss beam, the truss beam is hoisted into the limit groove formed by the support plate and the two groups of limit parts by the hoisting equipment, and the two groups of limit parts are driven by the auxiliary driving assembly to press against the opposite sides of the truss beam respectively, and the two groups of limit parts are used to limit the shaking of the truss beam to achieve rough positioning of the truss beam; then the two groups of limit parts are driven by the auxiliary driving assembly to drive the truss beam to move in a direction perpendicular to the limit groove; the adjustment assembly drives the truss beam to slide along the extension direction of the limit groove and the main driving assembly drives the support plate to rise and fall to achieve the adjustment of the position of the truss beam, so that the truss beam can be quickly and accurately moved to the designated welding position to achieve the final positioning of the truss beam. Compared with the traditional hoisting truss beam that requires repeated manual adjustment, it is more efficient, and in the process of adjusting the position of the truss beam, the two groups of limit parts are used to always clamp the truss beam, which is convenient for reducing the shaking of the truss beam caused by factors such as wind force, and is convenient for moving the truss beam to the designated position more quickly and conveniently.

[0009] Preferably, the adjusting assembly includes a driving roller rotatably mounted on the limiting portion, the driving roller being axially perpendicular to the plane where the support plate is located, and the adjusting assembly also includes a driving member arranged on the limiting portion for driving the roller to rotate; the auxiliary driving assembly includes auxiliary driving cylinders arranged on opposite sides of the support plate, the auxiliary driving cylinders being axially parallel to the sliding direction of the limiting portion, the two groups of the limiting portions are respectively located between the two groups of auxiliary driving cylinders and the two groups of auxiliary driving cylinders correspond one by one to the two groups of limiting portions respectively, and the piston rod of the auxiliary driving cylinder is connected to the corresponding limiting portion; the main driving assembly includes a main driving cylinder vertically arranged on the top of the bracket, and the piston rod of the main driving cylinder is connected to the lower surface of the support plate.

[0010] By adopting the above technical solution, after the two groups of auxiliary driving cylinders respectively drive the two groups of limiting parts to press against the truss beam, the driving roller is driven to rotate by the driving member on the limiting part, so that the truss beam can be driven to move along the extension direction of the limiting groove. The height of the truss beam can be adjusted by driving the supporting plate up and down by the main driving cylinder, making the overall position adjustment of the truss beam simpler and more convenient.

[0011] Preferably, a plurality of sliding rollers are rotatably mounted on the upper surface of the support plate, and the axial direction of the sliding rollers is parallel to the sliding direction of the limiting portion.

[0012] By adopting the above technical solution and setting the sliding roller, the friction between the truss beam and the support plate can be reduced by the sliding roller, so that the adjustment component on the limiting part can drive the truss beam to slide on the support plate more smoothly.

[0013] Preferably, a pre-positioning construction method for a positioning arch for a large diameter dome comprises the following steps:

[0014] S1: prefabricated smoke exhaust shaft ring truss, truss beam and ring gallery truss; the smoke exhaust shaft ring truss is assembled from a number of main arc trusses, and the ring gallery truss is assembled from a number of secondary arc trusses;

[0015] S2: supporting a main frame for supporting the main arc truss, a secondary frame for supporting the secondary arc truss, and a positioning arch frame for supporting the truss beam;

[0016] S3: Assembly of smoke exhaust shaft ring truss: hoist the main arc truss to the corresponding main frame through hoisting equipment and weld and fix the adjacent main arc trusses to form the smoke exhaust shaft ring truss;

[0017] S4: Assembly of the ring corridor truss: hoist the secondary arc truss to the corresponding secondary frame by hoisting equipment and weld and fix the adjacent secondary arc trusses to assemble them into the ring corridor truss;

[0018] S5: assembling truss beams: after assembling and fixing a set of secondary arc trusses, the truss beams are hoisted to the corresponding positioning arch frame by hoisting equipment, and after the truss beams are moved to the designated installation position by the positioning arch frame, the two ends of the truss beams are welded to the secondary arc trusses and the main arc trusses respectively;

[0019] S6: Weld connecting rods between adjacent truss beams.

[0020] By adopting the above technical scheme and setting a positioning arch frame, before constructing the truss beam, the two groups of limiting parts are driven away from each other by the auxiliary driving assembly, so that the truss beam can be hoisted between the two groups of limiting parts by the hoisting equipment; after the truss beam is placed in the limiting groove formed by the support plate and the two groups of limiting parts, the two groups of limiting parts are driven by the auxiliary driving assembly to respectively press against the opposite sides of the truss beam, so as to limit the shaking of the truss beam and realize the rough positioning of the truss beam; then, the two groups of limiting parts are driven by the auxiliary driving assembly to drive the truss beam to move in a direction perpendicular to the extension direction of the limiting groove, the adjustment assembly drives the truss beam to move in a direction parallel to the limiting groove, and the main driving assembly drives the support plate to drive the truss beam to move in a vertical direction, so as to realize the precise positioning of the truss beam, so as to quickly move the truss beam to the specified installation position, which is more efficient than the traditional method that requires manual repeated adjustment of the truss beam and is convenient for the installation of the truss beam. The smoke exhaust shaft ring truss is spliced ​​by a number of main arc trusses, and the ring gallery truss is spliced ​​by a number of secondary arc trusses, so that the smoke exhaust shaft ring truss and the ring gallery truss do not need to be formed in one piece, which is convenient for the manufacture and transportation of the smoke exhaust shaft ring truss and the ring gallery truss.

[0021] Preferably, among the plurality of said secondary arc-shaped trusses, one group of the secondary arc-shaped trusses is a closing section, and the secondary arc-shaped trusses adjacent to the closing section are the terminal standard sections;

[0022] In step S4, constructing the closing section of the ring corridor truss includes the following steps:

[0023] S4.1: Before assembling the last standard section of the secondary arc-shaped truss, install the main lifting assembly and the secondary lifting assembly on the secondary frames corresponding to the last standard section and the folding section respectively;

[0024] S4.2: After hoisting the last standard section to the corresponding auxiliary tire frame, connect the main lifting assembly to the bottom of the last standard section near the closing section;

[0025] S4.3: Lift up the end of the last standard section close to the closing section through the main lifting assembly;

[0026] S4.4: Lift the closing section between the two sets of terminal standard sections;

[0027] S4.5: Connect the auxiliary lifting assembly to the bottom of the closing section;

[0028] S4.6: The main lifting assembly and the auxiliary lifting assembly are used to respectively drive the standard end of the last section and the closing section to move downward until the standard end section and the closing section are placed in position;

[0029] S4.7: Weld and fix the two ends of the last standard section to the installed and fixed secondary arc truss and closing section respectively.

[0030] By adopting the above technical solution, when installing the closing section, the main lifting assembly is used to lift up one end of the last section standard section close to the closing section, so that the two groups of last section standard sections can form an expansion with the opening facing upward, which is convenient for hoisting the closing section between the two groups of last section standard sections. After the closing section is hoisted into the expansion between the two groups of last section standard sections and the auxiliary lifting assembly is connected to the bottom of the closing section, the main lifting assembly and the auxiliary lifting assembly are used to respectively drive the last section standard section and the closing section to move downward, so as to realize the installation of the closing section, making the installation of the closing section simpler and more convenient. By connecting the auxiliary lifting assembly to the bottom end of the closing section, it is helpful to limit the situation in which the closing section is squeezed out by the two adjacent last section standard sections during the downward movement of the closing section and the last section standard section, resulting in displacement.

[0031] Preferably, the main lifting assembly includes a main lifting cylinder arranged on the auxiliary tire frame, the bottom end of the main lifting cylinder is ball-jointed on the auxiliary tire frame, and the top end of the main lifting cylinder is ball-jointed with a main connecting plate; the auxiliary lifting assembly includes an auxiliary lifting cylinder vertically arranged on the auxiliary tire frame, and the top end of the piston rod of the auxiliary lifting cylinder is vertically fixed with a auxiliary connecting plate.

[0032] By adopting the above technical scheme, after the main connecting plate on the piston rod of the main lifting cylinder is connected to the end of the last standard section close to the closing section, the main lifting cylinder drives its own piston rod to extend and retract, so as to lift or move down the end of the last standard section close to the closing section; by fixing the auxiliary connecting plate of the piston rod at the top of the piston rod of the auxiliary lifting cylinder to the bottom of the closing section, the closing section can be driven to move downward by the auxiliary lifting cylinder, thereby realizing the installation and placement of the closing section. This structure is simple, practical and easy to operate.

[0033] Preferably, in step S2, a plurality of embedded parts are first embedded in the ground; when the main tire frame, the auxiliary tire frame and the positioning arch frame are subsequently supported, the main tire frame, the auxiliary tire frame and the bottom end of the positioning arch frame are welded and fixed to the embedded parts.

[0034] By adopting the above technical solution and setting the embedded parts, it is convenient to improve the stability of the main tire frame, the auxiliary tire frame and the positioning arch frame.

[0035] Preferably, two groups of clamping rods are vertically arranged at the top of the main tire frame, and the main tire frame and the two groups of clamping rods form a clamping groove for the main arc truss to be embedded.

[0036] By adopting the above technical solution, the main arc truss is limited to move above the main frame by using the clamping groove, so that after the subsequent smoke exhaust shaft ring is assembled, it is difficult for the smoke exhaust shaft ring to separate from the main frame.

[0037] In summary, the present application includes at least one of the following beneficial technical effects:

[0038] 1. A support plate and a main driving assembly for driving the support plate to be lifted and lowered are provided on the bracket, limiting parts are provided on opposite sides of the support plate, and the support plate and the two groups of limiting parts form limiting grooves. The support plate is also provided with an auxiliary driving assembly for driving the two groups of limiting parts to slide in a direction perpendicular to the extension direction of the limiting grooves. The limiting part is provided with an adjusting assembly for driving the truss beam to slide in the extension direction of the limiting grooves. After the truss beam is hoisted into the limiting grooves, the two groups of limiting parts are driven by the auxiliary driving assembly to press against the truss beam to limit the shaking of the truss beam, and then the two groups of limiting parts are driven by the auxiliary driving assembly to drive the truss beam to slide in a direction perpendicular to the limiting grooves, the adjusting assembly drives the truss beam to slide in the extension direction of the limiting grooves, and the main driving assembly drives the support plate to drive the truss beam to move in the vertical direction, so as to realize fast and accurate movement of the truss beam to the designated installation position.

[0039] 2. When hoisting the closing section of the ring corridor truss, first lift the standard end of the last section through the main lifting assembly, so that the two sets of last section standard sections can form an upward expansion, which is convenient for placing the closing section between the two last section standard sections.

[0040] 3. When constructing the closing section, connect the auxiliary lifting assembly to the bottom of the closing section to prevent the closing section from being squeezed out by the two adjacent groups of terminal standard sections during the downward movement of the closing section. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram used to illustrate a dome in an embodiment of the present application.

[0042] Figure 2 It is a schematic diagram of the embodiment of the present application used to illustrate the state of assembling truss beams.

[0043] Figure 3 yes Figure 2 Enlarged schematic diagram of part A in the middle.

[0044] Figure 4 yes Figure 2 Enlarged schematic diagram of part B in the middle.

[0045] Figure 5 It is a schematic diagram of the embodiment of the present application used to illustrate the state of assembling the closed sections of the ring corridor trusses.

[0046] Description of reference numerals:

[0047] 1. Smoke exhaust shaft ring truss; 11. Main arc truss; 2. Ring gallery truss; 21. Auxiliary arc truss; 211. Closing section; 212. Last section standard section; 3. Truss beam; 31. Connecting rod; 4. Bracket; 41. Support plate; 42. Slide roller; 43. Auxiliary driving cylinder; 44. Limiting part; 45. Adjusting assembly; 451. Driving roller; 452. Driving member; 46. Main driving cylinder; 5. Auxiliary tire frame; 51. Main lifting cylinder; 511. Main connecting plate; 52. Auxiliary lifting cylinder; 522. Auxiliary connecting plate; 6. Main tire frame; 61. Clamping rod. DETAILED DESCRIPTION

[0048] The following is combined with Figure 1-5 This application is described in further detail.

[0049] The present application discloses a positioning arch frame and a pre-positioning construction method for a large diameter dome, referring to Figure 2 and Figure 3 A positioning arch frame for a large diameter dome includes a bracket 4. In this embodiment, the bracket 4 is a Bailey beam structure. A support plate 41 is arranged on the top of the bracket 4. A main driving component that drives the support plate 41 to rise and fall in the vertical direction is also arranged on the top of the support plate 41. Limiting parts 44 are arranged on opposite sides of the support plate 41. The support plate 41 and the limiting parts 44 on both sides form a limiting groove for the truss beam 3 to be embedded. The support plate 41 is provided with a secondary driving component that drives the two groups of limiting parts 44 to slide in a direction perpendicular to the extension direction of the limiting groove; the limiting parts 44 are provided with an adjusting component 45 that drives the truss beam 3 to move in the extension direction of the limiting groove;

[0050] Reference Figure 2 and Figure 3A rectangular opening is provided on the upper surface of the support plate 41, and two sets of rollers 42 are rotatably connected to the rectangular opening. The two sets of rollers 42 are arranged axially parallel and the axial direction of the rollers 42 is perpendicular to the extension direction of the limit groove. The rollers 42 protrude from the upper surface of the support plate 41. The arrangement of the rollers 42 is conducive to reducing the friction between the truss beam 3 and the support plate 41.

[0051] Reference Figure 2 and Figure 3 The main driving assembly includes two groups of main driving cylinders 46 vertically fixed on the top of the bracket 4. The piston rods of the main driving cylinders 46 are fixed to the lower surface of the support plate 41. The main driving cylinders 46 drive their own piston rods to extend and retract to drive the support plate 41 to move up and down. The auxiliary driving assembly includes auxiliary driving cylinders 43 fixed on opposite sides of the support plate 41. The axial direction of the auxiliary driving cylinders 43 is perpendicular to the extension direction of the limit groove. The two groups of limit parts 44 are located between the two groups of auxiliary driving cylinders 43 and the two groups of limit parts 44 correspond to the two groups of auxiliary driving cylinders 43 respectively. The piston rods of the auxiliary driving cylinders 43 are connected to the corresponding limit parts 44 respectively.

[0052] Reference Figure 2 and Figure 3 The adjustment component 45 includes a driving roller 451 rotatably connected to the limiting portion 44. The driving rollers 451 of the two groups of limiting portions 44 are arranged opposite to each other. The outer periphery of the driving rollers 451 is wrapped with a rubber layer to facilitate improving the friction between the driving rollers 451 and the truss beam 3. The adjustment component 45 also includes a driving member 452 arranged at the top of the limiting portion 44 for driving the driving rollers 451 to rotate. In this embodiment, the driving member 452 is a motor, and the output shaft of the motor is coaxially fixed to the top of the driving roller 451.

[0053] A pre-positioning construction method for a positioning arch frame for a large diameter dome, referring to Figure 2 and Figure 3 , including the following steps:

[0054] S1: prefabricated smoke exhaust shaft ring truss 1, truss beam 3 and ring gallery truss 2;

[0055] The smoke exhaust shaft ring truss 1 is assembled from four groups of main arc trusses 11, and the ring gallery truss 2 is assembled from eight groups of secondary arc trusses 21; the smoke exhaust shaft ring truss 1 and the ring gallery truss 2 do not need to be manufactured in one piece, which is convenient for reducing the manufacturing difficulty of both the smoke exhaust shaft ring truss 1 and the ring gallery truss 2, and at the same time, it is convenient for transporting both the smoke exhaust shaft ring truss 1 and the ring gallery truss 2. One of the eight groups of secondary arc trusses 21 is a closing section 211, and the two groups of secondary arc trusses 21 adjacent to the closing section 211 are the terminal standard sections 212.

[0056] S2: Supporting the main frame 6 for supporting the main arc truss 11, the auxiliary frame 5 for supporting the auxiliary arc truss 21 and the positioning arch frame for supporting the truss beam 3; the specific operation steps are as follows:

[0057] S2.1: Pre-embed and fix several embedded parts on the ground;

[0058] S2.2: When supporting the main tire frame 6, the auxiliary tire frame 5 and the positioning arch frame, the three are welded and fixed to the embedded parts pre-buried in the ground; it is convenient to improve the stability of the main tire frame 6, the auxiliary tire frame 5 and the positioning arch frame through the embedded parts.

[0059] Reference Figure 2 and Figure 4 Two groups of clamping rods 61 are welded and fixed vertically upward on the top of the main tire frame 6. The two groups of clamping rods 61 are arranged opposite to each other. The main tire frame 6 and the two groups of clamping rods 61 form a clamping groove for the main arc truss 11 to be embedded. In this embodiment, the main tire frame 6 is a Bailey beam structure, and the clamping rods 61 are I-beams. The clamping groove formed by the main tire frame 6 and the two groups of clamping rods 61 limits the displacement of the smoke exhaust shaft annular truss, so that the smoke exhaust shaft annular truss 1 is more firmly supported on the main tire frame 6.

[0060] S3: Assembling the smoke exhaust shaft ring truss 1: hoisting the main arc truss 11 onto the corresponding main frame 6 by a truck crane and welding and fixing the adjacent main arc trusses 11 to form the smoke exhaust shaft ring truss 1 by splicing.

[0061] S4: Assembling the annular corridor truss 2: The secondary arc-shaped trusses 21 are hoisted onto the corresponding secondary tire frames 5 by a truck crane, and the adjacent secondary arc-shaped trusses 21 are welded and fixed to form the annular corridor truss 2.

[0062] Reference Figure 2 and Figure 5 In step S4, assembling the closing section 211 of the corridor truss 2 includes the following steps:

[0063] S4.1: Before assembling the last standard section 212 of the secondary arc-shaped truss 21 , the main lifting assembly and the secondary lifting assembly are respectively installed on the secondary frame 5 corresponding to the last standard section 212 and the closing section 211 .

[0064] The main lifting assembly includes two groups of main lifting cylinders 51 arranged on the auxiliary tire frame 5 corresponding to the last standard section 212. The bottom end of the main lifting cylinder 51 is ball-jointed on the auxiliary tire frame 5, and the top end of the piston rod of the main lifting cylinder 51 is ball-jointed with a main connecting plate 511; the auxiliary lifting assembly includes two groups of auxiliary lifting cylinders 52 vertically arranged on the auxiliary tire frame 5 corresponding to the closure section 211, and the top end of the piston rod of the auxiliary lifting cylinder 52 is vertically fixed with an auxiliary connecting plate 522.

[0065] S4.2: After the last standard section 212 is hoisted to the corresponding auxiliary tire frame 5 by a truck crane, the main connecting plate 511 on the piston rod of the main lifting cylinder 51 is fixed to the bottom side of the last standard section 212 near the end of the closing section 211 by bolts;

[0066] S4.3: The main lifting cylinder 51 drives its own piston rod to extend to lift up one end of the last standard section 212 close to the closing section 211, so that the two groups of last standard sections 212 can form an expansion with the opening facing upward.

[0067] S4.4: The closing section 211 is hoisted between the two sets of terminal standard sections 212 by a vehicle; then the auxiliary lifting cylinder 52 is driven to extend its piston rod until the auxiliary connecting plate 522 of the auxiliary lifting cylinder 52 abuts against the bottom of the closing section 211 .

[0068] S4.5: Fix the auxiliary connecting plate 522 at the top of the piston rod of the auxiliary lifting cylinder 52 to the bottom of the closing section 211 by means of bolts, so as to realize the connection between the auxiliary lifting assembly and the closing section 211 .

[0069] S4.6: The main lifting cylinder 51 and the auxiliary lifting cylinder 52 are used to respectively drive the last standard section 212 and the closing section 211 to move downward until the last standard section 212 and the closing section 211 are completely positioned.

[0070] S4.7: Weld and fix the two ends of the last standard section 212 to the installed and fixed secondary arc truss 21 and the closing section 211 respectively.

[0071] By fixing the auxiliary connecting plate 522 at the bottom of the closing section 211, on the one hand, it is convenient to drive the closing section 211 downward through the auxiliary lifting cylinder 52, and at the same time, it can also prevent the closing section 211 from being squeezed out by the two adjacent end standard sections 212 during the downward movement.

[0072] S5: Assembling the truss beam 3: After each set of secondary arc trusses 21 is installed and fixed, a set of truss beams 3 is hoisted to the corresponding positioning arch frame by a car crane, and after the truss beams 3 are moved to the designated installation position by the positioning arch frame, the two ends of the truss are respectively welded and fixed to the secondary arc trusses 21 and the main arc trusses 11. The specific operations are as follows:

[0073] S5.1: driving the two sets of limiting parts 44 away from each other through the auxiliary driving assembly;

[0074] S5.2: Use a truck crane to lift the truss beam 3 between the two sets of limit parts 44 so that the bottom of the truss beam 3 abuts against the sliding roller 42 on the support plate 41;

[0075] S5.3: Rough positioning of the truss beam 3: The auxiliary driving assembly drives the driving rollers 451 on the two sets of limiting parts 44 to press against the opposite sides of the truss beam 3 respectively;

[0076] S5.4: Precise positioning of the truss beam 3: With the total station, the auxiliary drive assembly drives the two sets of limit parts 44 to drive the truss beam 3 to move along the extension direction perpendicular to the limit slot, the adjustment assembly 45 drives the truss beam 3 to move along the extension direction of the limit slot, and the main drive assembly drives the support plate 41 to drive the truss beam 3 to move along the vertical direction until the truss beam 3 is moved to the designated installation position;

[0077] S5.5: Weld the two ends of the truss beam 3 to the secondary arc truss 21 and the main arc truss 11 respectively.

[0078] S6: welding connecting rods 31 between adjacent truss beams 3 .

[0079] The present application sets a positioning arch frame. When installing the truss beam 3, the positioning arch frame is used to limit the shaking of the truss beam 3. At the same time, the positioning arch frame is used to adjust the position of the truss beam 3, so that the truss beam 3 can be easily and quickly moved to the designated installation position, which is convenient for the installation of the truss beam 3 and reduces the construction period of the large-diameter dome.

[0080] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pre-positioning construction method for a positioning arch frame for a large diameter dome, characterized in that: A positioning arch frame for a large-diameter dome, comprising a bracket (4) and a support plate (41) mounted on the top of the bracket (4); the bracket (4) is provided with a main driving component for driving the support plate (41) to rise and fall; two opposite sides of the support plate (41) are provided with limiting portions (44); the support plate (41) and two groups of limiting portions (44) form a limiting groove for a truss beam (3) to be embedded; the support plate (41) is also provided with a secondary driving component for driving the two groups of limiting portions (44) to slide in a direction perpendicular to the extension direction of the limiting groove; the limiting portion (44) is also provided with an adjusting component (45) for driving the truss beam (3) to slide in the extension direction of the limiting groove; The adjusting assembly (45) comprises a driving roller (451) rotatably mounted on the limiting portion (44), wherein the driving roller (451) is axially perpendicular to the plane where the support plate (41) is located, and the adjusting assembly (45) further comprises a driving member (452) arranged on the limiting portion (44) for driving the roller (451) to rotate; the auxiliary driving assembly comprises auxiliary driving cylinders (43) arranged on opposite sides of the support plate (41), wherein the auxiliary driving cylinders (43) are axially parallel to the sliding direction of the limiting portion (44), the two groups of limiting portions (44) are respectively located between the two groups of auxiliary driving cylinders (43), and the two groups of auxiliary driving cylinders (43) correspond to the two groups of limiting portions (44) one by one, and the piston rod of the auxiliary driving cylinder (43) is connected to the corresponding limiting portion (44); the main driving assembly comprises a main driving cylinder (46) vertically arranged on the top of the bracket (4), and the piston rod of the main driving cylinder (46) is connected to the lower surface of the support plate (41); A plurality of sliding rollers (42) are rotatably mounted on the upper surface of the support plate (41), and the axial direction of the sliding rollers (42) is parallel to the sliding direction of the limiting portion (44); A pre-positioning construction method for a positioning arch frame for a large-diameter dome comprises the following steps: S1: prefabricated smoke exhaust shaft ring truss (1), truss beam (3) and ring gallery truss (2); the smoke exhaust shaft ring truss (1) is assembled from a plurality of groups of main arc trusses (11), and the ring gallery truss (2) is assembled from a plurality of groups of secondary arc trusses (21); S2: supporting a main frame (6) for supporting a main arc-shaped truss (11), a secondary frame (5) for supporting a secondary arc-shaped truss (21), and a positioning arch frame for supporting a truss beam (3); S3: Assembling the smoke exhaust shaft ring truss (1): hoisting the main arc truss (11) onto the corresponding main frame (6) by hoisting equipment and welding and fixing the adjacent main arc trusses (11) to form the smoke exhaust shaft ring truss (1); S4: Assembling the annular corridor truss (2): hoisting the secondary arc-shaped trusses (21) onto the corresponding secondary tire frames (5) by means of hoisting equipment and welding and fixing the adjacent secondary arc-shaped trusses (21) to form the annular corridor truss (2); S5: assembling the truss beam (3): after assembling and fixing a set of secondary arc-shaped trusses (21), the truss beam (3) is hoisted to the corresponding positioning arch frame by a hoisting device, and after the truss beam (3) is moved to a designated installation position by the positioning arch frame, the two ends of the truss beam (3) are respectively welded to the secondary arc-shaped trusses (21) and the main arc-shaped trusses (11); S6: Welding connecting rods (31) between adjacent truss beams (3).

2. The pre-positioning construction method of the positioning arch for a large-diameter dome according to claim 1 is characterized in that: Among the plurality of the secondary arc-shaped trusses (21), one group of the secondary arc-shaped trusses (21) is a closing section (211), and the secondary arc-shaped trusses (21) adjacent to the closing section (211) are terminal standard sections (212); In step S4, constructing the closing section (211) of the corridor truss (2) includes the following steps: S4.1: Before assembling the last standard section (212) of the secondary arc-shaped truss (21), a main lifting assembly and a secondary lifting assembly are respectively installed on the secondary frame (5) corresponding to the last standard section (212) and the closing section (211); S4.2: After the last standard section (212) is hoisted to the corresponding auxiliary tire frame (5), the main lifting assembly is connected to the bottom of the last standard section (212) close to the closing section (211); S4.3: Lifting one end of the last standard section (212) close to the closing section (211) by the main lifting assembly; S4.4: Hang the closing section (211) between the two sets of terminal standard sections (212); S4.5: Connect the auxiliary lifting assembly to the bottom of the closing section (211); S4.6: The main lifting assembly and the auxiliary lifting assembly are used to respectively drive the standard end of the last section and the closing section (211) to move downward until the standard end section (212) and the closing section (211) are in place; S4.7: The two ends of the last standard section (212) are respectively welded to the installed and fixed secondary arc truss (21) and the closing section (211).

3. The pre-positioning construction method of the positioning arch for a large-diameter dome according to claim 2 is characterized in that: The main lifting assembly comprises a main lifting cylinder (51) arranged on the auxiliary tire frame (5), the bottom end of the main lifting cylinder (51) is ball-jointed on the auxiliary tire frame (5), and the top of the main lifting cylinder (51) is ball-jointed with a main connecting plate (511); the auxiliary lifting assembly comprises an auxiliary lifting cylinder (52) vertically arranged on the auxiliary tire frame (5), and the top end of the piston rod of the auxiliary lifting cylinder (52) is vertically fixed with an auxiliary connecting plate (522).

4. The pre-positioning construction method of the positioning arch for a large-diameter dome according to claim 3 is characterized in that: In step S2, a number of embedded parts are first embedded in the ground; when the main tire frame (6), the auxiliary tire frame (5) and the positioning arch frame are subsequently supported, the main tire frame (6), the auxiliary tire frame (5) and the bottom end of the positioning arch frame are welded and fixed to the embedded parts.

5. The pre-positioning construction method of the positioning arch for a large-diameter dome according to claim 4 is characterized in that: Two groups of clamping rods (61) are vertically arranged at the top of the main tire frame (6), and the main tire frame (6) and the two groups of clamping rods (61) form a clamping groove for the main arc truss (11) to be embedded.

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