A steel grid building structure of an assembled aerial bridge

Abstract

The present invention discloses a steel grid building structure of an assembled aerial bridge, which relates to the field of assembled aerial bridges and includes a main frame, wherein a clamping platform is provided at the bottom of one end of the main frame, and an inclined platform is provided at the top, and support beams are provided at intervals along the length direction of the main frame, and the connecting frame is used to support one end of the main frame, and the bottoms of both ends of the connecting frame are provided with positioning platforms for cooperating with the clamping platform, and receiving platforms for cooperating with the inclined platform, and the rotating frame is rotatably connected to the two ends of the connecting frame, and a locking port for clamping with the supporting beam is provided on the top surface. The present invention simplifies the construction process. After the connecting frame is installed, the main frames on both sides of the connecting frame can be spliced ​​with the connecting frame by hoisting. Compared with traditional steel grid bridges connected by bolts or welding, the present invention can effectively shorten the construction time of the main frame splicing of the steel grid bridge while ensuring the stable splicing construction and use of modular large-span bridges.

Description

Technical Field

[0001] The present invention relates to the field of assembled aerial bridges, and in particular to a steel grid building structure of an assembled aerial bridge. Background Art

[0002] The prefabricated steel grid aerial bridge is a new type of bridge that combines modular design with spatial grid structure technology. Its core lies in prefabricating steel grid components in the factory and quickly assembling them on site to form a high-strength three-dimensional spatial structure.

[0003] The steel grid aerial bridge in the existing technology is generally composed of multiple steel rods connected by nodes in a specific grid form. After being prefabricated in the factory, they are directly transported by vehicle to the construction site and then hoisted and spliced. The steel grid is used to control the bolt holes reserved at the end of the bridge for assembly or welding, which can greatly shorten the construction time of the bridge.

[0004] With regard to the above-mentioned related technologies, in the existing technology, in a construction scenario with a large span, in order to ensure the structural strength and service life of the steel grid aerial overpass, the middle pier of the overpass is generally pre-cast below the middle position of the overpass, and the overpass to be erected is divided into two sections with the middle pier of the overpass as the boundary. The two sections of the steel grid overpass need to be connected at the middle pier of the overpass, which often requires additional bolt connection holes or increased welding workload, thereby extending the overall construction time of the overpass. In summary, the overlap construction of the steel grid overpass at the middle pier of the overpass in the existing technology is more troublesome. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a steel grid building structure of an assembled aerial bridge to solve the technical problem of the complicated overlap construction of the steel grid bridge at the middle pier of the bridge in the prior art.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a steel grid building structure of an assembled aerial bridge, comprising a main frame, a clamping platform is provided at the bottom of one end of the main frame, and an inclined platform is provided at the top, the main frame is provided with support beams at intervals along its own length direction, and further comprises a connecting frame, the connecting frame is used to support one end of the main frame, the bottoms of both ends of the connecting frame are provided with positioning platforms for cooperating with the clamping platform, and receiving platforms for cooperating with the inclined platform, and further comprises a rotating frame, the rotating frame is rotatably connected to the two ends of the connecting frame, and a locking port for clamping and cooperating with the support beam is provided on the top surface.

[0007] By adopting the above technical solution, the construction process is simplified. After the connecting frame is installed, the main frames on both sides of the connecting frame can be spliced ​​with the connecting frame by hoisting. Compared with the traditional steel grid overpass connected by bolts or welding, it can effectively shorten the construction time of the main frame splicing of the steel grid overpass while ensuring the stable splicing construction and use of the modular large-span overpass.

[0008] The present invention is further configured such that the coupling platform has a trapezoidal structure, the positioning platform is used to prevent the lateral movement of the coupling platform when the connecting frame supports the main frame, and corresponding inclined surfaces are provided between the inclined insertion platform and the receiving platform. When the main frame is connected to the connecting frame, the inclined insertion platform and the receiving platform contact each other to limit the lateral relative movement of the main frame and the connecting frame.

[0009] Preferably, when hoisting the main frame, the main frame and the connecting frame can be positioned in the width direction by plugging it toward the pre-fixed and installed connecting frame.

[0010] The present invention is further configured such that the bottom surface of the connecting frame is connected to a fixed frame along the length direction, both ends of the fixed frame are rotatably connected to a rotating frame, the end of the rotating frame away from its own rotating axis is tilted upward, the locking port is arranged at the non-tilted part of the rotating frame, the bottom end of the fixed frame is fixedly connected to an inclined support rod, a spring is arranged between the support rod and the bottom surface of the rotating frame, and the rotating frame is used to limit the longitudinal relative movement of the main frame and the connecting frame.

[0011] Preferably, when the support beam at the end of the main frame moves to the position of the rotating frame, the rotating frame is first pressed down and then continues to move toward the connecting frame, and the support beam is locked by utilizing the rebound of the rotating frame.

[0012] The present invention is further configured such that the main frame is provided with a first bearing plate at intervals along the length direction, and a second bearing plate is provided at one end close to the connecting frame, a third bearing plate is provided on the connecting frame, and both ends of the third bearing plate are rotatably connected with a lap plate, and the lap plate can be rotatably placed on the support beam of the adjacent main frame.

[0013] Preferably, each bearing plate is used for pedestrians to pass through the overpass.

[0014] The present invention is further configured such that the bottom surface of the lap plate is fixedly connected to a first positioning block and a second positioning block corresponding to each rotating frame. When the lap plate is placed on the support beam, the support beam is clamped between the first positioning block and the second positioning block, and the end of the second positioning block is tilted toward the direction of the rotating frame to limit the rotation of the rotating frame.

[0015] Preferably, the first positioning block and the second positioning block cooperate with each other to further fix the main frame and the connecting frame in the longitudinal direction.

[0016] The present invention is further configured such that a post is slidably connected in the lap plate, one end of the post can be inserted into the second supporting plate, and the other end is fixedly connected to a sliding bar, and the sliding bar can slide on the bottom surface of the lap plate.

[0017] Preferably, the sliding bar is pushed to control the sliding amount of the plug post.

[0018] The present invention is further configured such that the top of the main frame toward one end of the connecting frame is rotatably connected to a rotating shaft, both ends of the rotating shaft are fixedly connected to rotating pieces, a fixed cylinder coaxial with the rotating shaft is provided between the rotating pieces, both ends of the fixed cylinder are slidably connected to telescopic columns, a compression spring is provided between the end of the telescopic column and the inner wall of the fixed cylinder, and a positioning hole for inserting the telescopic column is provided at the top of the connecting frame.

[0019] Preferably, telescopic columns inserted into the positioning holes are used to limit the relative displacement of the main frame and the connecting frame in the longitudinal direction.

[0020] The present invention is further configured such that the telescopic column is inside the fixed tube before being aligned with the positioning hole, the top of the connecting frame is fixedly connected to a pushing piece for pushing the rotating piece to rotate, and the end of the rotating piece away from the fixed tube is fixedly connected to a counterweight bar.

[0021] Preferably, when the main frame is not connected to the connecting frame, the rotating piece is in a vertical state.

[0022] The present invention is further configured such that both sides of the connection frame are fixedly connected with connection plates, and both ends of the connection plates can be fixedly connected to the main frame.

[0023] Preferably, the connecting plate can further enhance the stability of the connection between the main frame and the connecting frame when necessary.

[0024] The present invention is further configured such that the bottom end of the support beam is fixedly connected to a reinforcement frame, both ends of the reinforcement frame are fixedly connected to the main frame, the width of the reinforcement frame is greater than the width of the main frame, and upward guardrails are connected at both ends.

[0025] Preferably, the guardrail structures on both sides of the reinforcement frame can constitute cable racks, providing locations for laying cables for decorations or lighting fixtures on the overpass.

[0026] In summary, the present invention mainly has the following beneficial effects:

[0027] 1. The present invention quickly connects two main frames through a connecting frame, simplifying the construction process. After the connecting frame is installed, the main frames on both sides of the connecting frame can be spliced ​​with the connecting frame by hoisting. Compared with traditional steel grid overpasses connected by bolts or welding, it can effectively shorten the construction time of the main frame splicing of the steel grid overpass while ensuring the stable splicing construction and use of modular large-span overpasses.

[0028] 2. The present invention uses a locking structure for clamping the support beam on the main frame through the two-section rotation connection of the connecting frame. When the clamping platform at the bottom end of the main frame cooperates with the positioning platform on the connecting frame, the locking structure simultaneously locks the support beam, thereby quickly assembling the main frame in the horizontal direction.

[0029] 3. The present invention provides mutually cooperating inclined structures at the top of the connecting frame and the main frame to limit the lateral movement of the top of the main frame. During the process of the main frame moving toward the connecting frame for splicing, the pushing piece causes the rotating piece to rotate, thereby aligning the fixing tube with the positioning hole. The telescopic column in the fixing tube is inserted into the positioning hole while the inclined structures at the top of the connecting frame and the main frame contact each other, thereby achieving positioning of the main frame in the length direction.

[0030] 4. The present invention fixes the third supporting plate on the connecting frame, rotates the lap plate on the third supporting plate after the main frame and the connecting frame are spliced ​​together, and uses the positioning block on the bottom of the lap plate to limit the rotation of the rotating frame. At the same time, the positioning block can also limit the relative movement of the main frame and the connecting frame in the length direction, further improving the stability of the rotating frame locking the main frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A perspective view of the present invention;

[0032] Figure 2 For the present invention Figure 1 A magnified view of middle A;

[0033] Figure 3 For the present invention Figure 1 Enlarged view of middle B;

[0034] Figure 4 It is another perspective perspective diagram of the present invention;

[0035] Figure 5 For the present invention Figure 4 Enlarged view of middle C;

[0036] Figure 6 This is a three-dimensional diagram of the main frame and the connection frame of the present invention in a docking state;

[0037] Figure 7 For the present invention Figure 6 Enlarged view of middle D;

[0038] Figure 8 This is a three-dimensional diagram of the main frame and the connection frame in the docking state from another perspective of the present invention;

[0039] Figure 9 For the present invention Figure 8 Enlarged view of E in the middle;

[0040] Figure 10 A perspective view of the locking post of the present invention;

[0041] Figure 11 It is a three-dimensional diagram of the lap plate of the present invention.

[0042] Description of reference numerals:

[0043] 1. Main frame; 101. Clamping platform; 102. Oblique insertion platform; 2. Connecting frame; 201. Positioning platform; 202. Receiving platform; 3. Support beam; 4. Reinforcement frame; 5. Fixed frame; 6. Rotating frame; 601. Locking port; 7. Support rod; 8. Spring; 9. First bearing plate; 10. Second bearing plate; 11. Third bearing plate; 12. Lap plate; 1201. Slide groove; 1202. Connecting hole; 13. Sliding bar; 14. Insert column; 15. First positioning block; 16. Second positioning block; 17. Rotating shaft; 18. Rotating plate; 19. Fixed cylinder; 20. Telescopic column; 21. Counterweight bar; 22. Pushing plate; 23. Positioning hole; 24. Connecting plate; 25. Handrail. DETAILED DESCRIPTION

[0044] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0045] The following describes an embodiment of the present invention based on its overall structure.

[0046] First embodiment:

[0047] A steel grid structure for an assembled skybridge, see Figure 1-11 , including a main frame 1, a clamping platform 101 is provided at the bottom of one end of the main frame 1, and an inclined insertion platform 102 is provided at the top, and support beams 3 are provided at intervals along the length direction of the main frame 1 itself.

[0048] Specifically, the clamping platform 101 has a trapezoidal structure and is connected to the main beam along the length direction at the bottom of the main frame 1 by welding, thereby ensuring the stability of the main frame 1 when it is overlapped with the connecting frame 2. The inclined surface of the inclined insertion platform 102 can play a certain guiding role for the main frame 1 during the process of connecting the main frame 1 to the connecting frame 2, thereby effectively reducing the shaking of the main frame 1 during the connection process.

[0049] It also includes a connecting frame 2, which is used to support one end of the main frame 1. The bottoms of both ends of the connecting frame 2 are provided with positioning platforms 201 for cooperating with the clamping platform 101, and receiving platforms 202 for cooperating with the oblique insertion platform 102. The bottom surface of the connecting frame 2 is connected to the middle pier of the overpass through a support seat.

[0050] Specifically, when the positioning platform 201 cooperates with the clamping platform 101 , the connecting frame 2 is already in a state of supporting the main frame 1 . The positioning platform 201 cooperates with the clamping platform 101 to limit the lateral movement of the main frame 1 relative to the connecting frame 2 .

[0051] It also includes a rotating frame 6, which is rotatably connected to both ends of the connecting frame 2, and a locking hole 601 for snap-fitting with the support beam 3 is provided on the top surface. Specifically, the locking hole 601 of the rotating frame 6 is in a horizontal state under normal circumstances.

[0052] In the above embodiment, please refer to Figure 1-3 、 Figure 6-7 The clamping platform 101 has a trapezoidal structure. The positioning platform 201 is used to prevent the lateral movement of the clamping platform 101 when the connecting frame 2 supports the main frame 1. Corresponding inclined surfaces are provided between the oblique insertion platform 102 and the receiving platform 202. When the main frame 1 and the connecting frame 2 are connected and matched, the inclined surface of the oblique insertion platform 102 and the inclined surface of the receiving platform 202 contact each other.

[0053] Specifically, the inclined insertion platform 102 and the receiving platform 202 contact each other to limit the lateral relative movement of the main frame 1 and the connecting frame 2. When hoisting the main frame 1, it is inserted toward the pre-fixed and installed connecting frame 2 to achieve the positioning of the main frame 1 and the connecting frame 2 in the width direction.

[0054] In the above embodiment, please refer to Figure 1-5 The bottom surface of the connecting frame 2 is connected to a fixing frame 5 along the length direction, and both ends of the fixing frame 5 are rotatably connected to a rotating frame 6. Specifically, in this embodiment, both ends of the connecting frame 2 are rotatably connected to two rotating frames 6.

[0055] Furthermore, the end of the rotating frame 6 away from its own rotating axis is tilted upward, and the locking port 601 is set at the non-tilted part of the rotating frame 6. During the connection between the main frame 1 and the connecting frame 2, the support beam 3 of the main frame 1 presses down the upward tilted part of the rotating frame 6, so that the spring 8 is in a compressed state. The bottom end of the fixed frame 5 is fixedly connected to the inclined support rod 7, and a spring 8 is provided between the support rod 7 and the bottom surface of the rotating frame 6. The rotating frame 6 is used to limit the longitudinal relative movement of the main frame 1 and the connecting frame 2. When the support beam 3 at the end of the main frame 1 moves to the position of the rotating frame 6, the rotating frame is first pressed down, and then continues to move toward the connecting frame 2, and the support beam 3 is locked by the rebound of the rotating frame 6.

[0056] In the above embodiment, please refer to Figure 6-9 The main frame 1 is provided with first bearing plates 9 at intervals along the length direction, and a second bearing plate 10 is provided at one end close to the connecting frame 2. A third bearing plate 11 is provided on the connecting frame 2. Both ends of the third bearing plate 11 are rotatably connected with a lap plate 12. The lap plate 12 can be rotatably placed on the support beam 3 of the adjacent main frame 1. Each bearing plate is used for pedestrians to pass through the overpass.

[0057] Furthermore, handrails 25 are fixedly connected to both sides of the first supporting plate 9, the second supporting plate 10 and the third supporting plate 11. The handrails 25 are fixed to the corresponding supporting plates by bolt connection. The handrails 25 are used to protect pedestrians walking on the overpass.

[0058] Second embodiment:

[0059] A steel grid structure for an assembled skybridge, see Figure 1-11 On the basis of the first embodiment, the difference from the first embodiment is that the bottom surface of the lap plate 12 is fixedly connected to a first positioning block 15 and a second positioning block 16 corresponding to each rotating frame 6. Specifically, the distance between the first positioning block 15 and the second positioning block 16 is slightly larger than the width of the support beam 3 on the premise that the lap plate 12 can be lowered normally.

[0060] Specifically, when the lap plate 12 is placed on the support beam 3, the support beam 3 is clamped between the first positioning block 15 and the second positioning block 16, and the end of the second positioning block 16 is tilted toward the rotating frame 6 to limit the rotation of the rotating frame 6. Specifically, the tilted end of the second positioning block 16 directly contacts the rotating frame 6 in the state of locking the support beam 3. The rotating frame 6 must be rotated downward to unlock it, and the end of the second positioning block 16 contacts the end of the rotating frame 6. The second positioning block 16 limits the downward rotation of the rotating frame 6. The first positioning block 15 and the second positioning block 16 cooperate with each other to further achieve longitudinal fixation of the main frame 1 and the connecting frame 2.

[0061] In the above embodiment, please refer to Figure 4-8 、 Figure 11 , a post 14 is slidably connected to the lap board 12, one end of the post 14 can be inserted into the second supporting plate 10, and the other end is fixedly connected to a sliding bar 13, the sliding bar 13 can slide on the bottom surface of the lap board 12, and the sliding bar 13 is pushed to control the sliding amount of the post 14. Specifically, the bottom surface of the lap board 12 is provided with a sliding groove 1201 for sliding the connecting part of the sliding bar 13 and the post 14, and the second supporting plate 10 is provided with a connecting hole 1202 for inserting the post 14 toward the lap board 12. After the post 14 is inserted into the connecting hole 1202, it can limit the rotation of the lap board 12 and improve the stability of the edge of the lap board 12.

[0062] Specifically, the edge of the lap plate 12 is provided with a perforation for passing the iron wire. During the installation of the connecting frame 2, the two lap plates 12 approach each other and are connected to each other after the iron wire passes through the perforation. After the main frame 1 is connected, the iron wire is removed and the lap plate 12 can be lowered to avoid the lap plate 12 affecting the installation of the connecting frame 2.

[0063] The third embodiment:

[0064] A steel grid structure for an assembled skybridge, see Figure 1-11 On the basis of the second embodiment, the difference from the second embodiment is that the top of the main frame 1 facing one end of the connecting frame 2 is rotatably connected to a rotating shaft 17, and both ends of the rotating shaft 17 are fixedly connected to rotating pieces 18. A fixed cylinder 19 coaxial with the rotating shaft 17 is provided between the rotating pieces 18, and telescopic columns 20 are slidably connected to both ends of the fixed cylinder 19. A compression spring is provided between the end of the telescopic column 20 and the inner wall of the fixed cylinder 19. A positioning hole 23 for inserting the telescopic column 20 is provided at the top of the connecting frame 2, and the telescopic column 20 inserted into the positioning hole 23 is used to limit the longitudinal relative displacement of the main frame 1 and the connecting frame 2.

[0065] Specifically, the compression spring is in a compressed state when the telescopic column 20 is not extended, and can be inserted into the positioning hole 23 after the telescopic column 20 is extended.

[0066] In the above embodiment, please refer to Figure 5-7 、 Figure 10 Before the telescopic column 20 is aligned with the positioning hole 23, it is inside the fixed tube 19. The top of the connecting frame 2 is fixedly connected to a pushing piece 22 for pushing the rotating piece 18 to rotate. The end of the rotating piece 18 away from the fixed tube 19 is fixedly connected to a counterweight bar 21, so that when the main frame 1 is not connected to the connecting frame 2, the rotating piece 18 is in a vertical state.

[0067] Specifically, the counterweight bar 21 makes the rotating piece 18 in a vertical state when it is not pushed by the pushing piece 22, wherein the counterweight bar 21 is located below the rotating shaft 17, and the fixed cylinder 19 is located above the rotating shaft 17. The end of the telescopic column 20 in the fixed cylinder 19 contacts the main frame 1 and is in a non-extended state. When the main frame 1 moves toward the connecting frame 2, the pushing piece 22 and the rotating piece 18 produce relative movement and push the rotating piece 18 to rotate, the fixed cylinder 19 rotates to a position coaxial with the positioning hole 23. At this time, the main frame 1 and the connecting frame 2 are connected. While the rotating frame 6 locks the support beam 3, the telescopic column 20 extends out and inserts into the positioning hole 23 to achieve synchronous longitudinal locking of the top and bottom ends of the main frame 1.

[0068] Fourth embodiment:

[0069] A steel grid structure for an assembled skybridge, see Figure 1-11On the basis of the third embodiment, the difference from the third embodiment is that both sides of the connecting frame 2 are fixedly connected with connecting plates 24, and the connecting plate 24 is located in the middle of the connecting frame 2. Workers standing on the second supporting plate 10 or the third supporting plate 11 can easily connect the connecting plate 24 to the main frame 1. Both ends of the connecting plate 24 can be fixedly connected to the main frame 1. Specifically, in this embodiment, both ends of the connecting plate 24 are fixedly connected to the main frame 1 by bolts. The connecting plate 24 can further improve the stability of the connection between the main frame 1 and the connecting frame 2 when necessary.

[0070] In the above embodiment, please refer to Figure 1-3 The bottom end of the support beam 3 is fixedly connected to a reinforcement frame 4, and both ends of the reinforcement frame 4 are fixedly connected to the main frame 1. The width of the reinforcement frame 4 is greater than the width of the main frame 1, and upward guardrails are connected at both ends. The guardrail structures on both sides of the reinforcement frame 4 can constitute a cable rack, providing a location for laying cables for decorations or lighting fixtures on the overpass, and can also provide a support frame for cables or pipes crossing the street, further improving the functionality of the overpass.

[0071] When the overpass in the present invention is specifically erected:

[0072] First, pre-cast the overpass middle pier in the middle of the required section, and use small lifting equipment to lift and install the connecting frame 2 to the overpass middle pier;

[0073] The road on one side of the pier in the closed overpass is hoisted with large lifting equipment to align and plug the main frame 1 with the connecting frame 2. During the plugging process, the support beam 3 at the end of the main frame 1 presses down the corresponding rotating frame 6, and then the main frame 1 continues to be plugged toward the connecting frame 2 until the main frame 1 is placed on the connecting frame 2. During the process of continuing to move forward, the clamping platform 101 and the positioning platform 201 cooperate with each other, and the oblique insertion platform 102 and the receiving platform 202 cooperate with each other. At the same time, the rotating frame 6 is reset by the elastic force of the spring 8, and the locking port 601 of the rotating frame 6 clamps the lower end part of the support beam 3, thereby realizing quick fixation of the main frame 1 and the connecting frame 2. The other end of the main frame 1 is placed on the pier or other supporting structure on the roadside. According to the different construction requirements of various overpasses, an appropriate connection scheme is adopted. The main frame 1 at the other end of the connecting frame 2 is connected in the same way, which saves a lot of time for on-site installation of bolts or welding, and effectively shortens the construction period of the overpass.

[0074] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiment without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A steel grid building structure of an assembled sky bridge, characterized in that: include: A main frame (1), wherein a clamping platform (101) is provided at the bottom of one end of the main frame (1), and an oblique insertion platform (102) is provided at the top, and support beams (3) are provided at intervals along the length direction of the main frame (1); A connecting frame (2), the connecting frame (2) being used to support one end of the main frame (1), and the bottoms of both ends of the connecting frame (2) are provided with a positioning platform (201) for cooperating with the clamping platform (101), and a receiving platform (202) for cooperating with the oblique insertion platform (102); A rotating frame (6), wherein the rotating frame (6) is rotatably connected to both ends of the connecting frame (2), and a locking port (601) for engaging with the supporting beam (3) is provided on the top surface, the engaging platform (101) is a trapezoidal structure, the positioning platform (201) is used to block the lateral movement of the engaging platform (101) when the connecting frame (2) supports the main frame (1), and mutually corresponding inclined surfaces are provided between the inclined insertion platform (102) and the receiving platform (202), and when the main frame (1) is engaged with the connecting frame (2), the inclined insertion platform (102) and the receiving platform (202) contact each other to limit the lateral relative movement of the main frame (1) and the connecting frame (2), and the top of the main frame (1) toward one end of the connecting frame (2) is rotatably connected to a rotating shaft (17), and both ends of the rotating shaft (17) are fixedly connected to a rotating piece ( 18), a fixed cylinder (19) coaxial with the rotating shaft (17) is provided between the rotating pieces (18), and telescopic columns (20) are slidably connected at both ends of the fixed cylinder (19), and a compression spring is provided between the end of the telescopic column (20) and the inner wall of the fixed cylinder (19). A positioning hole (23) for inserting the telescopic column (20) is provided at the top of the connecting frame (2), and the telescopic column (20) is located inside the fixed cylinder (19) before it is aligned with the positioning hole (23). A pushing piece (22) for pushing the rotating piece (18) to rotate is fixedly connected to the top of the connecting frame (2), and a counterweight bar (21) is fixedly connected to the end of the rotating piece (18) away from the fixed cylinder (19). When the rotating frame (6) locks the support beam (3), the telescopic column (20) extends out and is inserted into the positioning hole (23).

2. The steel grid building structure of the assembled aerial bridge according to claim 1 is characterized by: The bottom surface of the connecting frame (2) is connected to a fixed frame (5) along the length direction, and both ends of the fixed frame (5) are rotatably connected to a rotating frame (6), and the end of the rotating frame (6) away from its own rotating axis is tilted upward, and the locking port (601) is provided at the non-tilted portion of the rotating frame (6). The bottom end of the fixed frame (5) is fixedly connected to a tilted support rod (7), and a spring (8) is provided between the support rod (7) and the bottom surface of the rotating frame (6). The rotating frame (6) is used to limit the relative movement of the main frame (1) and the connecting frame (2) in the longitudinal direction.

3. The steel grid building structure of the assembled aerial bridge according to claim 1 is characterized by: The main frame (1) is provided with first bearing plates (9) at intervals along the length direction, and a second bearing plate (10) is provided at one end close to the connecting frame (2). A third bearing plate (11) is provided on the connecting frame (2), and both ends of the third bearing plate (11) are rotatably connected to a lap plate (12), and the lap plate (12) can be rotatably placed on the support beam (3) of the adjacent main frame (1).

4. The steel grid building structure of the assembled aerial bridge according to claim 3 is characterized by: The bottom surface of the lap plate (12) is fixedly connected to a first positioning block (15) and a second positioning block (16) corresponding to each rotating frame (6); when the lap plate (12) is placed on the support beam (3), the support beam (3) is clamped between the first positioning block (15) and the second positioning block (16); the end of the second positioning block (16) is tilted toward the rotating frame (6) to limit the rotation of the rotating frame (6).

5. The steel grid building structure of the assembled aerial bridge according to claim 3 is characterized by: A plug post (14) is slidably connected inside the lap plate (12), one end of the plug post (14) can be inserted into the second bearing plate (10), and the other end is fixedly connected to a sliding bar (13), and the sliding bar (13) can slide on the bottom surface of the lap plate (12).

6. The steel grid building structure of the assembled sky bridge according to claim 1 is characterized by: Both sides of the connection frame (2) are fixedly connected with connection plates (24), and both ends of the connection plates (24) can be fixedly connected to the main frame (1).

7. The steel grid building structure of the assembled aerial bridge according to claim 3 is characterized by: The bottom end of the support beam (3) is fixedly connected to a reinforcement frame (4), both ends of the reinforcement frame (4) are fixedly connected to the main frame (1), the width of the reinforcement frame (4) is greater than the width of the main frame (1), and upward guardrails are connected to both ends of the reinforcement frame (4).

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