A high-altitude assembly system and construction method for a large-span cantilever truss

Abstract

The present invention belongs to the technical field of building construction, and relates to a large-span cantilever truss high-altitude assembly system and construction method, wherein grooves are provided at both ends of a top plate in a steel structure, a same rotating shaft is rotatably penetrated between the inner walls on both sides of the groove, a second connecting block and a first connecting block are fixedly sleeved on the outer walls of the two rotating shafts on the same side, and a same group of connecting components for connection are arranged between the first connecting block and the second connecting block; an auxiliary component for assisting the connection between the first connecting block and the second connecting block is arranged on the top of the second connecting block; an adjustment component for adjusting the angle of the second connecting block and the first connecting block is arranged inside the top support rod; the problem that it is difficult to adjust the position of a unit section of a cantilever truss with a large dead weight after hoisting, resulting in low splicing accuracy of adjacent unit sections is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and relates to a large-span cantilever truss high-altitude assembly system and a construction method. Background Art

[0002] Large sports stadiums and exhibition centers often use large-span steel structures as roofs. In order to improve aesthetics and lighting, cantilever trusses are further used as the main steel structure. In addition, since the supporting strength of cantilever trusses is lower than that of conventional cantilever trusses, higher requirements are placed on the refined assembly of cantilever trusses.

[0003] The assembly of ultra-high and ultra-thin cantilever trusses often adopts segmented splicing construction, that is, the overall ultra-high and ultra-thin cantilever trusses are split into multiple unit sections, and then hoisted one by one to the predetermined position by crane or tower crane, and then installed in the air. When the number of unit sections is large, the number of hoisting times is large and the assembly efficiency is slow. However, when the number of unit sections is small, the number of components in a single unit section is relatively large, the weight of the unit section is large, and the hoisting difficulty is large. After the hoisting is completed, the unit section is heavy and it is difficult to adjust the position of the unit section, resulting in low splicing accuracy of adjacent unit sections. Summary of the invention

[0004] In view of this, in order to solve the problem that it is difficult to adjust the position of the unit segment after hoisting the above-mentioned cantilever truss unit segment with large deadweight, thereby resulting in low splicing accuracy of adjacent unit segments, the present invention provides a large-span cantilever truss high-altitude assembly system and construction method.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A large-span cantilever truss high-altitude assembly system, comprising:

[0007] Multiple steel structures, multiple steel structures spliced ​​together;

[0008] The steel structure includes two symmetrically arranged bottom plates and two symmetrically arranged top plates, the two top plates and the two bottom plates are arranged in parallel, the two top plates are respectively located directly above the two bottom plates, two symmetrically arranged side support rods are fixedly connected between the bottom plates and the corresponding top plates, the same third reinforcing rod and two symmetrically arranged top support rods are fixedly connected between the two top plates, and the two top support rods are respectively located on both sides of the third reinforcing rod;

[0009] Both ends of the top plate are provided with grooves, and a same rotating shaft is rotatably passed through the inner walls of the two sides of the groove, and the outer walls of the two rotating shafts on the same side are respectively fixedly sleeved with a second connecting block and a first connecting block, and the same group of connecting components for connection is provided between the first connecting block and the second connecting block;

[0010] An auxiliary component for assisting the connection between the first connecting block and the second connecting block is arranged on the top of the second connecting block;

[0011] An adjusting component for adjusting the angles of the second connecting block and the first connecting block is arranged inside the top supporting rod.

[0012] Furthermore, the connecting component includes a vertical groove opened on one side of the bottom of the second connecting block, the bottom inner wall of the vertical groove is arc-shaped, and the inner walls on both sides of the vertical groove are opened with a No. 1 rectangular groove, and a protrusion is slidably penetrated inside the No. 1 rectangular groove, and a No. 1 spring is fixedly connected between one end of the protrusion and one side inner wall of the No. 1 rectangular groove, and an extension block is fixedly connected to one end of the first connecting block, and the extension block is used in conjunction with the vertical groove, and limiting grooves are opened on both sides of the extension block, and the limiting grooves are engaged with the protrusions.

[0013] Furthermore, the auxiliary component includes two symmetrically arranged slide grooves opened on the top of the second connecting block, the interior of the slide grooves is slidably connected with sliders, the tops of the two sliders are fixedly connected with the same sliding plate, a tension spring is fixedly connected between one side of the slider and one side inner wall of the slide groove, a cavity is opened inside the sliding plate, a first clamping block slides through one side of the bottom of the cavity, a second rectangular groove is opened on the top of the first connecting block, and the first clamping block is used in conjunction with the second rectangular groove.

[0014] Furthermore, the auxiliary component also includes a connecting plate slidably connected to the inside of the cavity, the bottom of the connecting plate is fixedly connected to the top of the first clamping block, a second clamping block is fixedly connected to one side of the bottom of the connecting plate, one end of the second clamping block slides through the cavity, a transverse groove is provided on the top of the second connecting block, a connected clamping groove is provided on the bottom inner wall of the transverse groove, both the transverse groove and the clamping groove are used to clamp the second clamping block, and two symmetrically arranged No. 2 springs are fixedly connected between the top of the connecting plate and the top inner wall of the cavity.

[0015] Furthermore, the adjustment component includes a strip groove opened inside the top support rod, a side groove is opened inside the top plate, the two ends of the strip groove are respectively connected with the two side grooves, the inside of the strip groove is slidably connected with a strip plate, the inner wall of one side of the strip groove is rotatably connected with a screw rod, one end of the screw rod extends to one side of the top support rod and is fixedly connected to a limiting block, and the screw rod thread passes through the strip plate.

[0016] Furthermore, a rectangular block is slidably connected inside the side groove, one side of the rectangular block is fixedly connected to one end of the strip groove, one end of the rotating shaft extends to the inside of the side groove, a gear is fixedly sleeved on the outer wall of the rotating shaft, one side of the rectangular block is fixedly connected to a rack, and the rack is meshed with the gear.

[0017] Furthermore, two symmetrically arranged second reinforcing rods are fixedly connected between the top supporting rod and the third reinforcing rod, and the same first reinforcing plate is fixedly connected between the two side supporting rods.

[0018] A construction method for a large-span cantilever truss high-altitude assembly system specifically comprises the following steps:

[0019] S1. Preparation: Check whether all steel structures, transmission mechanisms and locking devices are intact. After ensuring that they are correct, carry out hoisting in sequence according to design requirements;

[0020] S2. Hoisting and preliminary positioning: hoist multiple steel structures from one side to the other, and use the preliminary positioning function in the air to adjust the steel structures to the predetermined positions;

[0021] S3. Angle adjustment: If you need to adjust the connection angle between the steel structures, turn the limit block, drive the gear and the shaft to rotate through the transmission mechanism to achieve angle adjustment;

[0022] S4, fine adjustment and locking: After one steel structure is fixed, hoist another steel structure, and use the arc-shaped bottom inner wall of the vertical groove to help the bottom plate to make fine adjustments. As the first connecting block is lifted, the braking state of the sliding plate is released through the cooperation of the clamping block and the spring, so that it moves laterally under the tension of the tension spring, realizing the precise splicing and preliminary positioning of the steel structure;

[0023] S5. Final fixation: After all the steel structures are spliced, they are finally fixed together by bolts or welding to ensure the stability and safety of the structure;

[0024] S6. Quality inspection: Carry out quality inspection on the entire cantilever truss to ensure that all connections are firm and reliable without any safety hazards.

[0025] The large-span cantilever truss high-altitude assembly system disclosed in the present invention has the following advantages:

[0026] 1. Improve assembly efficiency: Through transmission mechanisms such as limit blocks, screws, and strip plates, the connection angles between multiple steel structures can be easily adjusted to achieve rapid assembly of curved cantilever trusses, thereby improving construction efficiency.

[0027] 2. Enhanced splicing accuracy: The arc-shaped bottom inner wall of the vertical groove, the design of the protrusion and the limit groove, as well as the cooperation of the sliding plate, the block and the spring can ensure the slight adjustment of the steel structure during the hoisting process, achieve accurate initial positioning, avoid the problem of inaccurate splicing caused by hoisting deviation, and solve the problem that it is difficult to adjust the position of the unit segment after the hoisting of the cantilever truss unit segment with a large dead weight, resulting in low splicing accuracy of adjacent unit segments.

[0028] 3. Improve construction safety: Through mechanical transmission and automatic locking mechanism, the need for manual operation is reduced, reducing safety risks during the construction process.

[0029] 4. Strong adaptability: The device can adapt to steel structures of different shapes and sizes, and has high versatility and flexibility.

[0030] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0032] Figure 1 This is a schematic diagram of the three-dimensional structure of a large-span cantilever truss high-altitude assembly system after splicing proposed by the present invention;

[0033] Figure 2 A three-dimensional structural schematic diagram of a large-span cantilever truss high-altitude assembly system proposed by the present invention;

[0034] Figure 3 A three-dimensional cross-sectional view of a large-span cantilever truss high-altitude assembly system proposed by the present invention;

[0035] Figure 4 A schematic diagram of the three-dimensional structure of a second connecting block in a high-altitude assembly system of a large-span cantilever truss proposed by the present invention;

[0036] Figure 5 A schematic diagram of the three-dimensional structure of a second connection block from a second perspective in a high-altitude assembly system of a large-span cantilever truss proposed by the present invention;

[0037] Figure 6 An exploded view of a second connecting block and a protruding block in a high-altitude assembly system of a large-span cantilever truss proposed by the present invention;

[0038] Figure 7 A three-dimensional cross-sectional view of a sliding plate in a high-altitude assembly system of a large-span cantilever truss proposed by the present invention;

[0039] Figure 8 A schematic diagram of the three-dimensional structure of a rack and a gear in a high-altitude assembly system of a large-span cantilever truss proposed by the present invention;

[0040] Fig. 9 This is a schematic diagram of the three-dimensional structure of the first connecting block in the high-altitude assembly system of a large-span cantilever truss proposed by the present invention.

[0041] In the figure: 1, bottom plate; 2, first reinforcing plate; 3, side support rod; 4, first connecting block; 5, top plate; 6, top support rod; 7, second reinforcing rod; 8, second connecting block; 9, sliding plate; 10, extension block; 11, groove; 12, third reinforcing rod; 13, strip groove; 14, screw; 15, limit block; 16, strip plate; 17, side groove; 18, first clamping block; 19, protrusion; 20, vertical groove; 21, rotating shaft; 22, horizontal groove; 23, slide groove; 24, clamping groove; 25, slider; 26, tension spring; 27, No. 1 spring; 28, No. 1 rectangular groove; 29, cavity; 30, No. 2 spring; 31, connecting plate; 32, second clamping block; 33, rack; 34, gear; 35, rectangular block; 36, No. 2 rectangular groove; 37, limit groove. DETAILED DESCRIPTION

[0042] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0043] Reference Figure 1-9 In a high-altitude assembly system of a large-span cantilever truss, multiple steel structures are spliced ​​together to form a cantilever truss as the main body of the large-span steel structure; wherein the steel structure, that is, the basic steel structure unit, includes two symmetrically arranged bottom plates 1 and two symmetrically arranged top plates 5, the two top plates 5 and the two bottom plates 1 are arranged in parallel, and the two top plates 5 are respectively located directly above the two bottom plates 1, and two symmetrically arranged side support rods 3 are fixedly connected between the bottom plates 1 and the corresponding top plates 5, and the same third reinforcing rod 12 and two symmetrically arranged top support rods 6 are fixedly connected between the two top plates 5, and the two top support rods 6 are respectively located on both sides of the third reinforcing rod 12, and two symmetrically arranged second reinforcing rods 7 are fixedly connected between the top support rod 6 and the third reinforcing rod 12, and the same first reinforcing plate 2 is fixedly connected between the two side support rods 3.

[0044] Grooves 11 are provided at both ends of the top plate 5, and a same rotating shaft 21 is rotatably penetrated between the inner walls on both sides of the groove 11, and the outer walls of the two rotating shafts 21 on the same side are respectively fixedly sleeved with a second connecting block 8 and a first connecting block 4, and the same group of connecting components for connection are provided between the first connecting block 4 and the second connecting block 8, and the connecting component includes a vertical groove 20 provided on one side of the bottom of the second connecting block 8, and the bottom inner wall of the vertical groove 20 is arc-shaped, and a No. 1 rectangular groove 28 is provided on the inner walls on both sides of the vertical groove 20, and a protrusion 19 is slidably penetrated inside the No. 1 rectangular groove 28, and a No. 1 spring 27 is fixedly connected between one end of the protrusion 19 and the inner wall of one side of the No. 1 rectangular groove 28, and an extension block 10 is fixedly connected to one end of the first connecting block 4, and the extension block 10 is used in conjunction with the vertical groove 20, and limiting grooves 37 are provided on both sides of the extension block 10, and the limiting grooves 37 are engaged with the protrusions 19.

[0045] The top of the second connecting block 8 is provided with an auxiliary component for assisting the connection between the first connecting block 4 and the second connecting block 8. The auxiliary component includes two symmetrically arranged slide grooves 23 opened on the top of the second connecting block 8. The inside of the slide grooves 23 is slidably connected with sliders 25. The tops of the two sliders 25 are fixedly connected with the same sliding plate 9. A tension spring 26 is fixedly connected between one side of the slider 25 and the inner wall of one side of the slide groove 23. A cavity 29 is opened inside the sliding plate 9. The bottom side of the cavity 29 is slidably penetrated by the first clamping block 18. The top of the first connecting block 4 is provided with a second rectangular groove 36. The first clamping block 18 and The No. 2 rectangular groove 36 is used in conjunction with the auxiliary component, and the auxiliary component also includes a connecting plate 31 slidably connected to the inside of the cavity 29. The bottom of the connecting plate 31 is fixedly connected to the top of the first clamping block 18. A second clamping block 32 is fixedly connected to one side of the bottom of the connecting plate 31. One end of the second clamping block 32 slides through the cavity 29. A transverse groove 22 is provided on the top of the second connecting block 8. A connected clamping groove 24 is provided on the bottom inner wall of the transverse groove 22. Both the transverse groove 22 and the clamping groove 24 are clamped with the second clamping block 32 for use. Two No. 2 springs 30 arranged symmetrically are fixedly connected between the top of the connecting plate 31 and the top inner wall of the cavity 29.

[0046] An adjustment component for adjusting the angles of the second connecting block 8 and the first connecting block 4 is provided inside the top support rod 6, and the adjustment component includes a strip groove 13 opened inside the top support rod 6, and a side groove 17 is opened inside the top plate 5. The two ends of the strip groove 13 are respectively connected to the two side grooves 17, and the inside of the strip groove 13 is slidably connected with a strip plate 16, and the inner wall of one side of the strip groove 13 is rotatably connected with a screw 14, one end of the screw 14 extends to one side of the top support rod 6 and is fixedly connected to the limiting block 15, and the screw 14 thread passes through the strip plate 16, and the inside of the side groove 17 is slidably connected with a rectangular block 35, one side of the rectangular block 35 is fixedly connected to one end of the strip groove 13, and one end of the rotating shaft 21 extends to the inside of the side groove 17, and the outer wall of the rotating shaft 21 is fixedly sleeved with a gear 34, and one side of the rectangular block 35 is fixedly connected with a rack 33, and the rack 33 is meshed with the gear 34.

[0047] A construction method for a large-span cantilever truss high-altitude assembly system specifically comprises the following steps:

[0048] S1. Preparation: Check whether all steel structures, transmission mechanisms and locking devices are intact. After ensuring that they are correct, carry out hoisting in sequence according to design requirements;

[0049] S2. Hoisting and preliminary positioning: hoist multiple steel structures from one side to the other, and use the preliminary positioning function in the air to adjust the steel structures to the predetermined positions;

[0050] S3, angle adjustment: if the connection angle between the steel structures needs to be adjusted, the limit block 15 is rotated, and the gear 34 and the rotating shaft 21 are driven to rotate through the transmission mechanism to achieve angle adjustment;

[0051] S4, fine adjustment and locking: After one steel structure is fixed, another steel structure is hoisted, and the arc-shaped bottom inner wall of the vertical groove 20 is used to help the bottom plate 1 to make fine adjustments. As the first connecting block 4 is lifted, the braking state of the sliding plate 9 is released through the cooperation of the clamping block and the spring, so that it moves laterally under the tension of the tension spring 26, so as to achieve accurate splicing and preliminary positioning of the steel structure;

[0052] S5. Final fixation: When all steel structures are spliced, other fixing devices such as bolts and welding are used to finally fix the steel structures together to ensure the stability and safety of the structure;

[0053] S6. Quality inspection: Carry out quality inspection on the entire cantilever truss to ensure that all connections are firm and reliable without any safety hazards.

[0054] When the large-span cantilever truss high-altitude assembly system is in use, multiple steel structures are hoisted in sequence from one side to the other side. Multiple steel structures can be initially positioned in the air to complete the splicing process. When it is necessary to adjust the connection angle between the multiple steel structures, the limit block 15 can be rotated, the limit block 15 drives the screw 14 to rotate, the screw 14 drives the strip plate 16 to move horizontally, the strip plate 16 drives the two rectangular blocks 35 to move horizontally, the rectangular block 35 drives the rack 33 to move horizontally, the rack 33 drives the gear 34 to rotate, the gear 34 drives the rotating shaft 21 to rotate, the rotating shaft 21 can drive the corresponding first connecting block 4 and the second connecting block 8 to adjust the angle, so as to facilitate the assembly of the cantilever truss with an arc;

[0055] When one of the steel structures is fixed, when hoisting the other steel structure, the extension block 10 can enter the interior of the vertical slot 20. Since the bottom inner wall of the vertical slot 20 is set in an arc shape, it can help the bottom plate 1 to make fine adjustments. At this time, due to the hoisting deviation of the first connecting block 4 and the angle deviation of the second connecting block 8, only a small part of the extension block 10 enters the interior of the vertical slot 20;

[0056] As the first connecting block 4 is continuously lifted, the first connecting block 4 contacts the sliding plate 9, the first clamping block 18 enters the interior of the No. 2 rectangular groove 36, and the first connecting block 4 continues to rise. At this time, the bottom inner wall of the No. 2 rectangular groove 36 pushes the first clamping block 18 to move upward, and the first clamping block 18 drives the connecting plate 31 to move upward, and the connecting plate 31 squeezes the No. 2 spring 30 and drives the second clamping block 32 to move upward;

[0057] When the second clamping block 32 is disengaged from the inside of the clamping slot 24, the braking state of the sliding plate 9 is released, and the slider 25 moves laterally under the tension of the tension spring 26. During this process, the bottom of the second clamping block 32 will slide laterally on the bottom inner wall of the transverse groove 22, and the slider 25 drives the sliding plate 9 to move laterally, and the sliding plate 9 drives the first clamping block 18 to move laterally. The first clamping block 18 conflicts with the inner wall of one side of the second rectangular groove 36. At this time, the first clamping block 18 can pull the first connecting block 4 toward one end of the second connecting block 8, thereby allowing the extension block 10 to completely enter the interior of the vertical groove 20, and because one side of the protrusion 19 is arranged in an arc shape, the protrusion 19 will be stuck in the interior of the limiting groove 37 under the elastic force of the first spring 27, thereby completing the splicing process of the first connecting block 4 and the second connecting block 8, completing the preliminary positioning, and ensuring the accuracy of the splicing.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A large-span cantilever truss high-altitude assembly system, characterized in that: include: A plurality of steel structures, wherein the plurality of steel structures are spliced ​​with each other; the steel structures comprise two symmetrically arranged bottom plates (1) and two symmetrically arranged top plates (5); two symmetrically arranged top support rods (6) are fixedly connected between the two top plates (5); grooves (11) are provided at both ends of the top plates (5); a same rotating shaft (21) is rotatably passed through the inner walls on both sides of the groove (11); a second connecting block (8) and a first connecting block (4) are fixedly sleeved on the outer walls of the two rotating shafts (21) located on the same side; and a same group of connecting components for connection are provided between the first connecting block (4) and the second connecting block (8); The connecting assembly comprises a vertical groove (20) provided on one side of the bottom of the second connecting block (8), the bottom inner wall of the vertical groove (20) being arc-shaped, the inner walls on both sides of the vertical groove (20) being provided with a first rectangular groove (28), a protrusion (19) slidingly passing through the interior of the first rectangular groove (28), a first spring (27) being fixedly connected between one end of the protrusion (19) and the inner wall on one side of the first rectangular groove (28), an extension block (10) being fixedly connected to one end of the first connecting block (4), the extension block (10) being used in conjunction with the vertical groove (20), and limiting grooves (37) being provided on both sides of the extension block (10), the limiting grooves (37) being engaged with the protrusions (19); An auxiliary component for assisting the connection between the first connecting block (4) and the second connecting block (8) is provided on the top of the second connecting block (8); The auxiliary component comprises two symmetrically arranged slide grooves (23) opened on the top of the second connecting block (8), the slide grooves (23) are slidably connected with sliders (25), the tops of the two sliders (25) are fixedly connected with the same sliding plate (9), one side of the slider (25) is fixedly connected with a tension spring (26) between the inner wall of one side of the slide groove (23), a cavity (29) is opened inside the sliding plate (9), a first clamping block (18) is slidably penetrated on one side of the bottom of the cavity (29), a second rectangular groove (36) is opened on the top of the first connecting block (4), and the first clamping block (18) is used in conjunction with the second rectangular groove (36); The auxiliary component further comprises a connecting plate (31) slidably connected to the inside of the cavity (29); the bottom of the connecting plate (31) is fixedly connected to the top of the first clamping block (18); a second clamping block (32) is fixedly connected to one side of the bottom of the connecting plate (31); one end of the second clamping block (32) slides through the cavity (29); a transverse groove (22) is provided on the top of the second connecting block (8); a communicating clamping groove (24) is provided on the bottom inner wall of the transverse groove (22); the transverse groove (22) and the clamping groove (24) are both clamped with the second clamping block (32) for use; and two symmetrically arranged No. 2 springs (30) are fixedly connected between the top of the connecting plate (31) and the top inner wall of the cavity (29); An adjustment component for adjusting the angles of the second connecting block (8) and the first connecting block (4) is arranged inside the top supporting rod (6), the adjustment component comprises a strip groove (13) provided inside the top supporting rod (6), a side groove (17) is provided inside the top plate (5), the two ends of the strip groove (13) are respectively connected to the two side grooves (17), the strip groove (13) is slidably connected to the strip plate (16), the inner wall of one side of the strip groove (13) is rotatably connected to a screw rod (14), one end of the screw rod (14) extends to One side of the top support rod (6) is fixedly connected to a limit block (15); the screw rod (14) is threadedly penetrated through the strip plate (16); a rectangular block (35) is slidably connected inside the side groove (17); one side of the rectangular block (35) is fixedly connected to one end of the strip groove (13); one end of the rotating shaft (21) extends into the inside of the side groove (17); a gear (34) is fixedly sleeved on the outer wall of the rotating shaft (21); a rack (33) is fixedly connected to one side of the rectangular block (35); the rack (33) is meshed with the gear (34).

2. A large-span cantilever truss high-altitude assembly system according to claim 1, characterized in that: The two top plates (5) and the two bottom plates (1) are arranged in parallel, the two top plates (5) are respectively located directly above the two bottom plates (1), two symmetrically arranged side support rods (3) are fixedly connected between the bottom plates (1) and the corresponding top plates (5), a third reinforcing rod (12) is fixedly connected between the two top plates (5), and the two top support rods (6) are respectively located on both sides of the third reinforcing rod (12).

3. A large-span cantilever truss high-altitude assembly system according to claim 2, characterized in that: Two symmetrically arranged second reinforcement rods (7) are fixedly connected between the top support rod (6) and the third reinforcement rod (12), and the same first reinforcement plate (2) is fixedly connected between the two side support rods (3).

4. A construction method for a large-span cantilever truss high-altitude assembly system according to any one of claims 1 to 3, characterized in that: The specific steps include: S1. Preparation: Check whether all steel structures, transmission mechanisms and locking devices are intact. After ensuring that they are correct, carry out hoisting in sequence according to design requirements; S2. Hoisting and preliminary positioning: hoist multiple steel structures from one side to the other, and use the preliminary positioning function in the air to adjust the steel structures to the predetermined positions; S3, angle adjustment: if the connection angle between the steel structures needs to be adjusted, the limit block (15) is rotated, and the gear (34) and the rotating shaft (21) are driven to rotate through the transmission mechanism to achieve angle adjustment; S4, fine adjustment and locking: After one steel structure is fixed, another steel structure is hoisted, and the arc-shaped bottom inner wall of the vertical groove (20) is used to help the bottom plate (1) to make fine adjustments. As the first connecting block (4) is lifted, the first clamping block (18), the second clamping block (32) and the second spring (30) cooperate to release the braking state of the sliding plate (9), so that it moves laterally under the tension of the tension spring (26), thereby achieving accurate splicing and preliminary positioning of the steel structures; S5. Final fixation: After all the steel structures are spliced, they are finally fixed together by bolts or welding to ensure the stability and safety of the structure; S6. Quality inspection: Carry out quality inspection on the entire cantilever truss to ensure that all connections are firm and reliable without any safety hazards.

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