Steel box girder support rotating shaft for steel box girder rotating construction

Abstract

The application relates to the technical field of bridge construction, in particular to a steel box girder supporting rotating shaft for steel box girder rotating construction, which comprises a pre-buried component and a rotating component, the pre-buried component is buried in a specified position of the ground; the rotating component comprises a connecting bottom plate, a lower rotating shaft, an upper rotating shaft and a friction-reducing piece, the connecting bottom plate is connected to the pre-buried component, the lower rotating shaft comprises a lower rotating cylinder with openings at both ends, one end of the lower rotating cylinder is connected to the middle part of the top wall of the connecting bottom plate, the axis of the lower rotating cylinder is perpendicular to the connecting bottom plate, the upper rotating shaft comprises an upper rotating cylinder, the upper rotating cylinder is coaxially arranged with the lower rotating cylinder, the upper rotating cylinder is inserted into one end of the lower rotating cylinder away from the connecting bottom plate, the upper rotating cylinder is rotationally connected to the lower rotating cylinder, the top part of the upper rotating cylinder is connected to the steel box girder, a traction device is connected to the upper rotating cylinder to drive the upper rotating cylinder to rotate, the friction-reducing piece is located at the bottom part of the upper rotating cylinder, the friction-reducing piece is connected to the connecting bottom plate, and the friction-reducing piece is in contact with the bottom part of the upper rotating cylinder; the application has the effect of improving positioning precision.

Description

Technical Field

[0001] This application relates to the field of bridge construction technology, and in particular to a steel box girder support shaft for steel box girder rotation construction. Background Technology

[0002] The steel box girder rotation construction technology is becoming increasingly important with the continuous development of infrastructure construction. It provides an effective solution for crossing existing railway lines, rivers, and other obstacles, greatly improving the efficiency and safety of bridge construction and reducing the impact on the surrounding environment and traffic. Through steel box girder rotation construction, bridges can be erected without interrupting existing traffic, reducing the risks during the construction process. It plays an irreplaceable role in the construction of urban transportation hubs and important transportation arteries.

[0003] In the prior art, a support device for bridge horizontal rotation construction is disclosed. The support device for bridge horizontal rotation construction includes: a lower turntable, the top of which has an annular groove, and multiple support rods are slidably connected to the surface of the annular groove. A beam frame is provided on the top of the lower turntable, and a bridge deck is fixedly installed on the top of the beam frame. A rotating mechanism is provided on the top of the lower turntable, and a base is provided below the lower turntable. The support mechanism allows the entire structure to be lifted to a suitable position for subsequent operations. By activating the rotating mechanism, a rotator is started, causing the traction steel cable to drive the upper turntable to rotate. When the upper turntable rotates the beam frame, it can better stabilize the beam frame, thereby improving the overall functionality and stability.

[0004] Regarding the aforementioned technologies, the traction cable drives the upper turntable to rotate, enabling the bridge to rotate. However, the support rod slides within the annular groove, causing the bridge to rotate. During this sliding process, the support rod may experience wear, reducing the stability of the bridge's rotation and lowering the positioning accuracy. Utility Model Content

[0005] To overcome the above problems, this application provides a steel box girder support shaft for steel box girder rotation construction.

[0006] The technical solution provided in this application for a steel box girder rotation support shaft for steel box girder rotation construction is as follows: A steel box girder rotation support shaft for steel box girder rotation construction includes a pre-embedded component and a rotating component, wherein the pre-embedded component is embedded in a designated position on the ground. The rotating assembly includes a connecting base plate, a lower rotating shaft, an upper rotating shaft, and a friction-reducing component. The connecting base plate is connected to the pre-embedded assembly. The lower rotating shaft includes a lower rotating cylinder with openings at both ends. One end of the lower rotating cylinder is connected to the middle of the top wall of the connecting base plate, and the axis of the lower rotating cylinder is perpendicular to the connecting base plate. The upper rotating shaft includes an upper rotating cylinder, which is coaxially arranged with the lower rotating cylinder. The upper rotating cylinder is inserted into the end of the lower rotating cylinder away from the connecting base plate. The upper rotating cylinder is rotatably connected to the lower rotating cylinder. The top of the upper rotating cylinder is connected to the steel box girder. A traction device is connected to the upper rotating cylinder to drive it to rotate. The friction-reducing component is located at the bottom of the upper rotating cylinder and is connected to the connecting base plate. The friction-reducing component is in contact with the bottom of the upper rotating cylinder.

[0007] By adopting the above technical solution, the pre-embedded components are buried at designated locations on the ground, which can stably install the entire structure. In the rotating component, the connecting base plate connects to the pre-embedded components and provides support for the lower rotating shaft. The lower rotating cylinder is set perpendicular to the connecting base plate to ensure structural stability. The upper rotating cylinder is coaxial with the lower rotating cylinder and rotatably connected to it and connected to the steel box girder. The traction device drives the upper rotating cylinder to rotate, which can realize the rotation of the steel box girder. The friction-reducing component is located at the bottom of the upper rotating cylinder and is connected to the connecting base plate and makes contact with the bottom of the upper rotating cylinder. It can reduce the frictional resistance between the upper rotating cylinder and the lower rotating cylinder, thereby reducing the wear of the upper rotating cylinder and the lower rotating cylinder, making the rotation of the steel box girder smoother and improving the positioning accuracy.

[0008] In one specific implementation, the friction-reducing component includes an MGE slide plate, the sidewall of which is fitted to the sidewall of the lower rotating cylinder, the top of which is in contact with the bottom of the upper rotating cylinder, and the MGE slide plate is fixed to the connecting base plate.

[0009] By adopting the above technical solutions, the MGE slide plate has advantages such as low friction coefficient and high wear resistance, which can effectively reduce the frictional resistance between the upper and lower rotating shafts, enabling the steel box girder to rotate more smoothly during the rotation process and improving the positioning accuracy.

[0010] In one specific implementation, the friction-reducing component includes a sliding ring, the connecting base plate is provided with a sliding groove inside the lower rotating cylinder, the sliding ring is located in the sliding groove, the sliding ring is rotatably connected to the connecting base plate, and the upper rotating cylinder is connected to the sliding ring.

[0011] By adopting the above technical solution, a sliding ring is used as a friction-reducing component. It is located in the sliding groove of the connecting base plate and is rotatably connected. The upper rotating cylinder is connected to the sliding ring and has the same diameter. This further effectively reduces the frictional resistance between the upper and lower rotating shafts, allowing the steel box girder to rotate more smoothly during the rotation process and improving the positioning accuracy.

[0012] In one specific implementation, a connecting assembly is further included. The connecting assembly includes a fixed ring, a rotating ring, and a plurality of connecting members. The fixed ring is sleeved on the outer wall of the upper rotating cylinder and connected to the upper rotating cylinder. The top of the lower rotating cylinder has a coaxial groove for placing the rotating ring. The rotating ring is rotatably connected to the lower rotating cylinder. The plurality of connecting members are evenly distributed along the circumference of the rotating ring. One end of each connecting member is connected to the rotating ring, and the other end is connected to the fixed ring.

[0013] By adopting the above technical solutions, based on the stable installation of the pre-embedded components and the rotation of the steel box girder by the rotating components, the connecting components can connect the fixed ring and the rotating ring through the connecting components when the friction-reducing components wear and the friction resistance between the upper and lower rotating shafts increases. This reduces the friction resistance between the upper and lower rotating shafts, buffers the pressure on the friction-reducing components, and further enhances the stability of the rotation. When the friction-reducing components are working normally, the connecting components can also connect or separate the fixed ring and the rotating ring, which facilitates the rotation of the steel box girder and improves the smoothness and positioning accuracy of the steel box girder rotation.

[0014] In one specific implementation, the connecting member includes a hydraulic cylinder, a connecting seat, two hinge plates, and a telescopic rod. The hydraulic cylinder is oriented in the same direction as the axis of the lower rotating cylinder. The cylinder body is fixed to the rotating ring, and the piston rod of the hydraulic cylinder faces the fixed ring. The piston rod of the hydraulic cylinder is connected to the connecting seat. The two hinge plates are evenly distributed circumferentially along the connecting seat. The hinge plates are inclined downwards from the connecting seat to the hydraulic cylinder towards the side away from the piston rod of the hydraulic cylinder. The higher end of the hinge plate is elastically hinged to... The connecting seat has multiple fixing grooves at the bottom of the fixing ring for the connecting seat to extend into. The fixing ring has two locking plates in the fixing grooves that are corresponding to and engage with the hinge plate. A gap is left between the two locking plates for the connecting seat and the telescopic rod to pass through. The lower end of the locking plate is connected to the fixing ring. The telescopic rod is located in the fixing groove and its direction is consistent with the axis of the upper rotating cylinder. The top of the telescopic rod is connected to the fixing ring, and the bottom of the telescopic rod has a slot for the connecting seat and the hinge plate to be inserted.

[0015] By adopting the above technical solution, the fixed ring of the connecting component is sleeved on the outer wall of the upper rotating cylinder, the rotating ring is rotatably connected to the lower rotating cylinder, and the connecting piece connects the rotating ring and the fixed ring. When the friction-reducing component wears and the frictional resistance of the upper and lower rotating shafts increases, the hydraulic cylinder drives the connecting seat to extend into the fixed groove, and the hinge plate and the clamping plate engage to connect the fixed ring and the rotating ring, which can reduce frictional resistance, buffer the pressure of the friction-reducing component, and enhance the stability of the rotation. When separation is required, the hydraulic cylinder pushes the connecting seat to separate the hinge plate from the clamping plate, which is convenient for operation. When the friction-reducing component is working normally, the fixed ring and the rotating ring can be connected or separated, which further facilitates the rotation of the steel box girder.

[0016] In one specific implementation, the lower rotating shaft further includes a lower rotating ring and a plurality of first reinforcing ribs. The lower rotating ring is sleeved on the outer wall of the lower rotating cylinder, and the bottom of the lower rotating ring is flush with the bottom of the lower rotating cylinder. The lower rotating ring is connected to the connecting base plate. The plurality of first reinforcing ribs are evenly distributed along the circumference of the lower rotating cylinder. The first reinforcing ribs are right-angled triangles, and the two right-angled sides of each first reinforcing rib are connected to the lower rotating cylinder and the lower rotating ring.

[0017] By adopting the above technical solution, the lower rotating ring is connected to the connecting base plate, which can provide stable support for the entire rotating shaft and prevent tilting or shaking during rotation; multiple first reinforcing ribs can further enhance the structural stability, so that the lower rotating ring can distribute stress more evenly when it is under pressure.

[0018] In one specific implementation scheme, the upper rotating shaft further includes an upper rotating ring, a top plate, and a plurality of second reinforcing ribs. The upper rotating ring is sleeved on the outer wall of the upper rotating cylinder, and the top of the upper rotating ring is flush with the top of the upper rotating cylinder. The top plate is located at the top of the upper rotating cylinder and is perpendicular to the axis of the upper rotating cylinder. The upper rotating ring is connected to the top plate, and the top plate is fixed to the steel box girder. The plurality of second reinforcing ribs are evenly distributed along the circumference of the upper rotating cylinder. The second reinforcing ribs are right-angled triangles, and the two right-angled sides of each second reinforcing rib are connected to the upper rotating cylinder and the upper rotating ring.

[0019] By adopting the above technical solution, the upper rotating ring is sleeved on the outer wall of the upper rotating cylinder and the top is flush with it. The top plate is located at the top of the upper rotating cylinder and connected to the upper rotating ring and fixed to the steel box girder, which facilitates the connection with the steel box girder. Multiple second reinforcing ribs are evenly distributed along the circumference of the upper rotating cylinder and the two right-angled sides are respectively connected to the upper rotating cylinder and the upper rotating ring, which enhances the structural stability of the upper rotating shaft, makes the steel box girder rotation construction more stable and smooth, and improves the positioning accuracy.

[0020] In one specific feasible implementation, the outer diameter of the upper rotating cylinder is 390mm, the inner diameter of the lower rotating cylinder is 414mm, and the minimum fitting clearance is 24mm.

[0021] By adopting the above technical solutions, it is ensured that the final rotating shaft will not jam when the beam is lowered, allowing the upper rotating cylinder to rotate smoothly within the lower rotating cylinder, thereby ensuring the smooth progress of the steel box girder rotation construction.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The designed steel box girder rotation construction uses a steel box girder support shaft. The upper and lower rotating cylinders are coaxial and rotatably connected and connected to the steel box girder. The traction device drives the upper rotating cylinder to rotate, which realizes the rotation of the steel box girder. The friction-reducing component is located at the bottom of the upper rotating cylinder and is connected to the connecting base plate and makes contact with the bottom of the upper rotating cylinder. It can reduce the frictional resistance between the upper and lower rotating cylinders, thereby reducing the frictional resistance during the rotation process, making the steel box girder rotation smoother and improving the positioning accuracy.

[0023] 2. The steel box girder rotation support shaft designed for the steel box girder rotation construction uses MGE sliding plates, which have advantages such as low friction coefficient and high wear resistance. These effectively reduce the frictional resistance between the upper and lower rotation shafts, allowing the steel box girder to rotate more smoothly during the rotation process and improving positioning accuracy.

[0024] 3. The steel box girder rotation support shaft designed for steel box girder rotation construction has a connecting component that can connect the fixed ring and the rotating ring when the friction-reducing components wear down or the frictional resistance between the upper and lower rotating shafts increases. This reduces the frictional resistance between the upper and lower rotating shafts, buffers the pressure on the friction-reducing components, and further enhances the stability of the rotation. When the friction-reducing components are working normally, the connecting component can also connect or separate the fixed ring and the rotating ring, facilitating the rotation of the steel box girder and improving the smoothness and positioning accuracy of the rotation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure in an embodiment of this application.

[0026] Figure 2 This is a cross-sectional view of this embodiment.

[0027] Figure 3 This is a schematic diagram of the sliding ring in this embodiment.

[0028] Figure 4 yes Figure 2 A magnified view of A in the middle.

[0029] Figure 5 This is a schematic diagram of the telescopic rod in this embodiment.

[0030] Explanation of reference numerals in the attached drawings: 1. Embedded component; 11. Embedded part; 111. First embedded steel plate; 112. Lower bracket; 1121. Support steel plate; 1122. Cylinder; 113. Second embedded steel plate; 12. Fixing part; 2. Rotating component; 21. Connecting base plate; 211. Sliding groove; 22. Lower rotating shaft; 221. Lower rotating cylinder; 2211. Annular groove; 222. Lower rotating ring; 223. First reinforcing rib; 23. Upper rotating shaft; 231. Upper... 232. Rotary drum; 233. Connecting plate; 234. Sealing plate; 235. Upper rotating ring; 236. Top plate; 237. Second reinforcing rib; 24. Friction reducing component; 241. MGE sliding plate; 242. Sliding ring; 3. Connecting assembly; 31. Fixing ring; 311. Fixing groove; 312. Clamping plate; 32. Rotating ring; 33. Connecting component; 331. Hydraulic cylinder; 332. Connecting seat; 333. Hinge plate; 334. Telescopic rod; 3341. Slot. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0032] This application discloses a steel box girder support shaft for steel box girder rotation construction.

[0033] Reference Figure 1 A steel box girder support shaft for steel box girder rotation construction includes a pre-embedded component 1, a rotating component 2, and a connecting component 3. The rotating component 2 is located on the pre-embedded component 1, and the connecting component 3 is located on the rotating component 2.

[0034] Reference Figure 1 and Figure 2The pre-embedded component 1 includes a pre-embedded part 11 and a fixing part 12. The pre-embedded part 11 includes a first pre-embedded steel plate 111, a lower support 112, and multiple second pre-embedded steel plates 113. A pre-embedded foundation pit is excavated at a designated location on the ground. The depth and size of the pre-embedded foundation pit are determined according to design requirements. In this embodiment, the pre-embedded foundation pit is a rectangular pit. The first pre-embedded steel plate 111 is located at the bottom of the pre-embedded foundation pit. The setting direction of the first pre-embedded steel plate 111 is perpendicular to the depth direction of the pre-embedded foundation pit, and the first pre-embedded steel plate 111 is buried at the bottom of the pre-embedded foundation pit. The lower support 112 is located at the top of the first pre-embedded steel plate 111. The lower support 112 includes two supporting steel plates 1121 and a cylinder 1122. The two supporting steel plates 1121 are connected to the first pre-embedded steel plate 113. The steel plates 111 are arranged in parallel, and two support steel plates 1121 are distributed along the depth direction of the pre-embedded foundation pit. The support steel plate 1121 near the bottom of the pre-embedded foundation pit is welded to the first pre-embedded steel plate 111. The cylinder 1122 is located between the two support steel plates 1121, and the axis of the cylinder 1122 is perpendicular to the support steel plate 1121. Both ends of the cylinder 1122 are fixedly connected to the two support steel plates 1121 by welding. Multiple second pre-embedded steel plates 113 are located at the top of the pre-embedded foundation pit, and the multiple second pre-embedded steel plates 113 are evenly distributed along the circumference of the pre-embedded foundation pit. The second pre-embedded steel plates 113 are buried in the ground. The top of the support steel plate 1121 near the top of the pre-embedded foundation pit is flush with the top of the second pre-embedded steel plate 113.

[0035] Reference Figure 1 The fixing component 12 is a fixed base plate, which is erected on top of multiple second embedded steel plates 113. The support steel plate 1121 near the top of the pre-embedded pit can support the fixed base plate, and the fixed base plate is welded to the second embedded steel plate 113.

[0036] Reference Figure 1 and Figure 2The rotating assembly 2 includes a connecting base plate 21, a lower rotating shaft 22, an upper rotating shaft 23, and a friction-reducing component 24. The connecting base plate 21 is located in the middle of the top wall of the fixed base plate and is parallel to the fixed base plate. The connecting base plate 21 is welded to the fixed base plate. The lower rotating shaft 22 includes a lower rotating cylinder 221, a lower rotating ring 222, and multiple first reinforcing ribs 223. Both ends of the lower rotating cylinder 221 are open. The lower rotating cylinder 221 is located on top of the connecting base plate 21, and its axis is perpendicular to the connecting base plate 21. The lower rotating cylinder 221 can be made of high-quality steel to ensure its strength and precision. The lower rotating ring 222 is fitted onto the outer wall of the lower rotating cylinder 221, and its bottom is flush with the bottom of the lower rotating cylinder 221. The lower rotating ring 222 is welded to the lower rotating cylinder 221 to prevent tilting or... The lower rotating ring 222, made of heavy steel, provides stable support for the entire rotating shaft. It is detachably connected to the connecting base plate 21 by multiple high-strength bolts, which are evenly distributed around the circumference of the lower rotating ring 222. For example, six M30 high-strength bolts are used; calculations show that their shear strength meets the strength requirements. Intermittent welding is performed at the connection between the lower rotating ring 222 and the connecting base plate 21 for easy removal after the shaft is in place. Multiple first reinforcing ribs 223 are evenly distributed around the circumference of the lower rotating cylinder 221. Each first reinforcing rib 223 is a right-angled triangle, with its two right-angled sides welded to both the lower rotating cylinder 221 and the lower rotating ring 222, further enhancing structural stability and allowing the lower rotating ring 222 to distribute stress more evenly when subjected to pressure.

[0037] Reference Figure 1 and Figure 2The upper rotating shaft 23 includes an upper rotating cylinder 231, a connecting plate 232, a sealing plate 233, an upper rotating ring 234, a top plate 235, and multiple second reinforcing ribs 236. The upper rotating cylinder 231 has openings at both ends and is inserted into the lower rotating cylinder 221. The upper rotating cylinder 231 and the lower rotating cylinder 221 are coaxially arranged and rotatably connected to the lower rotating cylinder 221. The outer diameter of the upper rotating cylinder 231 is 390mm, the inner diameter of the lower rotating cylinder 221 is 414mm, the wall thickness is 52mm, and the minimum fitting clearance is 24mm, which ensures the beam can be lowered to its maximum position. The rear rotating shaft will not jam. The upper rotating cylinder 231 is made of high-strength steel to ensure it can withstand greater pressure. The connecting plate 232 is welded to the bottom of the upper rotating cylinder 231, and the side wall of the connecting plate 232 is flush with the side wall of the upper rotating cylinder 231. The connecting plate 232 is perpendicular to the axis of the upper rotating cylinder 231. The sealing plate 233 is located inside the upper rotating cylinder 231, and the sealing plate 233 is parallel to the connecting plate 232 and close to the top of the upper rotating cylinder 231. The sealing plate 233 is welded to the upper rotating cylinder 231, and the top of the sealing plate 233 is flush with the top of the upper rotating cylinder 231. The top of the upper rotating cylinder 231 is flush with the top of the upper rotating cylinder 231. An upper rotating ring 234 is fitted onto the outer wall of the upper rotating cylinder 231, with its top flush with the top of the upper rotating cylinder 231. The upper rotating ring 234 is welded to the upper rotating cylinder 231. A top plate 235 is located at the top of the upper rotating cylinder 231, and is parallel to the sealing plate 233. The top plate 235 is typically square and can be made of steel plate. Its regular shape facilitates welding to the bottom of the steel box girder. The top plate 235 can also be designed as circular or other shapes according to actual needs. The upper rotating ring 234 and the top plate 235 are connected by multiple... The high-strength bolts are detachable, with multiple high-strength bolts evenly distributed around the upper rotating ring 234. This distribution makes the connection more stable and ensures uniform force transmission. For added safety, intermittent welding is added at the connection between the upper rotating ring 234 and the top plate 235 on the basis of the high-strength bolt connection, so that it can be easily removed after rotation. When the steel box girder needs to be rotated, the top plate 235 is connected to the steel box girder, and the upper rotating cylinder 231 is connected to the traction device to drive the upper rotating cylinder 231 to rotate, thereby driving the steel box girder to rotate.

[0038] Reference Figure 2 Multiple second reinforcing ribs 236 are evenly distributed around the upper rotating cylinder 231. The second reinforcing ribs 236 are right-angled triangles, and the two right-angled sides of the second reinforcing ribs 236 are welded to the upper rotating cylinder 231 and the upper rotating ring 234, which further enhances the structural stability.

[0039] Reference Figure 1 and Figure 2In one embodiment, the friction-reducing component 24 is located at the bottom of the connecting plate 232. The friction-reducing component 24 includes an MGE slide plate 241. The side wall of the MGE slide plate 241 is in contact with the side wall of the lower rotating cylinder 221. The top of the MGE slide plate 241 is in contact with the bottom of the connecting plate 232. The MGE slide plate 241 is fixedly connected to the lower rotating cylinder 221. The bottom of the MGE slide plate 241 is fixed to the connecting base plate 21. This material has advantages such as low friction coefficient and high wear resistance. The friction-reducing component 24 can also be made of other friction-reducing materials such as polytetrafluoroethylene. The thickness of the friction-reducing component 24 needs to be designed according to the actual situation to achieve the best friction-reducing effect. This effectively reduces the frictional resistance between the upper rotating shaft 23 and the lower rotating shaft 22, reduces the wear of the upper rotating shaft 23 and the lower rotating shaft 22, and allows the steel box girder to rotate more smoothly during the rotation process, improving the positioning accuracy.

[0040] Reference Figure 3 In another embodiment, the friction-reducing component 24 includes a sliding ring 242. A sliding groove 211 is provided in the lower rotating cylinder 221 of the connecting base plate 21. The sliding ring 242 is located in the sliding groove 211 and is rotatably connected to the connecting base plate 21. A connecting plate 232 is in contact with the sliding ring 242. The contact engagement includes the following: the connecting plate 232 can be welded to the sliding ring 242; the connecting plate 232 moves synchronously with the sliding ring 242; the connecting plate 232 can also be rotatably connected to the sliding ring 242; and the connecting plate 232 can also contact the sliding ring 242.

[0041] Reference Figure 1 , Figure 2 and Figure 4 The connecting component 3 includes a fixed ring 31, a rotating ring 32 and multiple connecting parts 33. The fixed ring 31 is sleeved on the outer wall of the upper rotating cylinder 231 and is detachably connected to the upper rotating cylinder 231 by multiple high-strength bolts. The top of the lower rotating cylinder 221 is coaxially provided with an annular groove 2211, and the rotating ring 32 is located in the annular groove 2211 and is rotatably connected to the lower rotating cylinder 221.

[0042] Reference Figure 2 and Figure 4Multiple connecting parts 33 are evenly distributed around the circumference of the rotating ring 32. Each connecting part 33 includes a hydraulic cylinder 331, a connecting seat 332, two hinge plates 333, and a telescopic rod 334. The hydraulic cylinder 331 is set in the same direction as the axis of the lower rotating cylinder 221. The cylinder body of the hydraulic cylinder 331 is fixedly connected to the rotating ring 32 by high-strength bolts. The hydraulic cylinder 331 moves synchronously with the rotating ring 32. The piston rod of the hydraulic cylinder 331 is set towards the fixed ring 31. The piston rod of the hydraulic cylinder 331 is welded to the connecting seat 332. The two hinge plates 333 are evenly distributed around the circumference of the connecting seat 332. In this embodiment, there are two hinge plates 333. The hinge plates 333 are set at an angle. The hinge plates 333 are set at an angle from the side of the connecting seat 332 to the side of the hydraulic cylinder 331 towards the side away from the piston rod of the hydraulic cylinder 331. The higher end of the hinge plate 333 is hinged to the connecting seat 332 by a torsion spring.

[0043] Reference Figure 2 , Figure 4 and Figure 5The bottom of the fixing ring 31 has multiple fixing grooves 311 for the connecting seat 332 to extend into, and each fixing groove 311 corresponds to a hydraulic cylinder 331. The fixing ring 31 has multiple locking plates 312 within the fixing grooves 311 that engage with the hinge plate 333. There are two locking plates 312, distributed circumferentially along the groove wall of the fixing groove 311. A gap is left between the two locking plates 312 for the connecting seat 332 and the telescopic rod 334 to pass through. The lower end of each locking plate 312 is welded to the fixing ring 31, and the telescopic rod 334 is located within the fixing groove 311. Inside 11, the telescopic rod 334 is oriented in the same direction as the axis of the upper rotating cylinder 231. The top of the telescopic rod 334 is welded to the fixing ring 31, and the bottom of the telescopic rod 334 has a slot 3341 for inserting the connecting seat 332 and the hinge plate 333. When the MGE slide plate 241 or the sliding ring 242 wears, the frictional resistance between the upper rotating shaft 23 and the lower rotating shaft 22 increases, requiring the fixing ring 31 and the rotating ring 32 to be connected. The hydraulic cylinder 331 drives the connecting seat 332 to extend into the fixing slot 311. During this process, the hinge plate 333 moves towards the... When the connecting seat 332 rotates to one side, and the connecting seat 332 is located in the fixed groove 311, the hinge plate 333 rotates away from the connecting seat 332. The hinge plate 333 engages with the clamping plate 312. At this time, the fixed ring 31 and the rotating ring 32 are connected. During the process of the traction device driving the upper rotating drum 231 to rotate, the frictional resistance can be reduced, thereby buffering the pressure of the MGE slide plate 241 and further enhancing the stability of the rotation. When it is necessary to separate the fixed ring 31 and the rotating ring 32, the hydraulic cylinder 331 continues to push the connecting seat 332 towards the telescopic rod 3. 34 moves to one side until the connecting seat 332 is located in the slot 3341. At this time, the hydraulic cylinder 331 pulls the connecting seat 332, and the connecting seat 332 drives the telescopic rod 334 through the gap left by the four clamping plates 312 until the connecting seat 332 and the telescopic rod 334 are separated. When the MGE slide plate 241 or the sliding ring 242 is working normally, the fixed ring 31 and the rotating ring 32 can be connected, that is, the fixed ring 31 is fixedly connected to the fixed ring 31 through the hydraulic cylinder 331, which further facilitates the rotation of the steel box girder, and can also separate the fixed ring 31 and the rotating ring 32.

[0044] The implementation principle of the steel box girder support shaft for steel box girder rotation construction in this embodiment is as follows: The steel box girder support shaft for steel box girder rotation construction in this embodiment uses a pre-embedded component 1 to stably install the entire structure on the ground. The rotation component 2 realizes the rotation function of the steel box girder. The connecting component 3 can effectively reduce the frictional resistance between the upper shaft 23 and the lower shaft 22 when the friction-reducing component 24 wears. The structural design of the pre-embedded component 1 ensures stable support for the upper structure. The friction-reducing component 24 in the rotation component 2 reduces the frictional resistance during rotation, making the rotation of the steel box girder smoother. The snap-fit ​​linkage structure of the connecting component 3 provides an effective solution to cope with the wear of the friction-reducing component 24, improves the smoothness and positioning accuracy of the steel box girder rotation, and greatly improves the quality and progress of the steel box girder rotation construction.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A steel box girder support shaft for steel box girder rotation construction, characterized in that: It includes a pre-embedded component (1) and a rotating component (2), wherein the pre-embedded component (1) is buried at a designated location on the ground; The rotating assembly (2) includes a connecting base plate (21), a lower rotating shaft (22), an upper rotating shaft (23), and a friction-reducing component (24). The connecting base plate (21) is connected to the pre-embedded assembly (1). The lower rotating shaft (22) includes a lower rotating cylinder (221) with openings at both ends. One end of the lower rotating cylinder (221) is connected to the middle of the top wall of the connecting base plate (21). The axis of the lower rotating cylinder (221) is perpendicular to the connecting base plate (21). The upper rotating shaft (23) includes an upper rotating cylinder (231). The upper rotating cylinder (231) and the lower rotating cylinder (221) are aligned. The shaft is configured such that the upper rotating cylinder (231) is inserted into the lower rotating cylinder (221) at the end away from the connecting base plate (21), the upper rotating cylinder (231) is rotatably connected to the lower rotating cylinder (221), the top of the upper rotating cylinder (231) is connected to the steel box girder, the traction device is connected to the upper rotating cylinder (231) to drive the upper rotating cylinder (231) to rotate, the friction reducing component (24) is located at the bottom of the upper rotating cylinder (231), the friction reducing component (24) is connected to the connecting base plate (21), and the friction reducing component (24) is in contact with the bottom of the upper rotating cylinder (231).

2. The steel box girder support shaft for steel box girder rotation construction according to claim 1, characterized in that: The friction-reducing component (24) includes an MGE slide plate (241), the side wall of the MGE slide plate (241) is in contact with the side wall of the lower rotating cylinder (221), the top of the MGE slide plate (241) is in contact with the bottom of the upper rotating cylinder (231), and the MGE slide plate (241) is fixed to the connecting base plate (21).

3. The steel box girder support shaft for steel box girder rotation construction according to claim 1, characterized in that: The friction-reducing component (24) includes a sliding ring (242). The connecting base plate (21) is located in the lower rotating cylinder (221) and has a sliding groove (211). The sliding ring (242) is located in the sliding groove (211) and is rotatably connected to the connecting base plate (21). The upper rotating cylinder (231) is connected to the sliding ring (242).

4. A steel box girder support shaft for steel box girder rotation construction according to any one of claims 1-3, characterized in that: It also includes a connecting component (3), which includes a fixed ring (31), a rotating ring (32) and a plurality of connecting parts (33). The fixed ring (31) is sleeved on the outer wall of the upper rotating cylinder (231) and connected to the upper rotating cylinder (231). The top of the lower rotating cylinder (221) is coaxially provided with an annular groove (2211) for placing the rotating ring (32). The rotating ring (32) is rotatably connected to the lower rotating cylinder (221). The plurality of connecting parts (33) are evenly distributed around the circumference of the rotating ring (32). One end of the connecting part (33) is connected to the rotating ring (32) and the other end is connected to the fixed ring (31).

5. A steel box girder support shaft for steel box girder rotation construction according to claim 4, characterized in that: The connecting member (33) includes a hydraulic cylinder (331), a connecting seat (332), two hinge plates (333), and a telescopic rod (334). The hydraulic cylinder (331) is positioned in the same direction as the axis of the lower rotating cylinder (221). The cylinder body of the hydraulic cylinder (331) is fixed to the rotating ring (32). The piston rod of the hydraulic cylinder (331) faces the fixed ring (31). The piston rod of the hydraulic cylinder (331) is connected to the connecting seat (332). The two hinge plates (333) are evenly distributed around the connecting seat (332). The hinge plates (333) are inclined downwards from the connecting seat (332) to the hydraulic cylinder (331) towards the side away from the piston rod of the hydraulic cylinder (331). The higher end of the hinge plate (333) is elastically hinged to the connecting seat (332). The bottom of the fixed ring (31) has multiple fixing grooves (311) for the connecting seat (332) to extend into. The fixed ring (31) has two locking plates (312) in the fixing grooves (311) that are engaged with the hinge plate (333). A gap is left between the two locking plates (312) for the connecting seat (332) and the telescopic rod (334) to pass through. The lower end of the locking plate (312) is connected to the fixed ring (31). The telescopic rod (334) is located in the fixing groove (311). The setting direction of the telescopic rod (334) is consistent with the axial direction of the upper rotating cylinder (231). The top of the telescopic rod (334) is connected to the fixed ring (31). The bottom of the telescopic rod (334) has a slot (3341) for the connecting seat (332) and the hinge plate (333) to be inserted.

6. The steel box girder support shaft for steel box girder rotation construction according to claim 1, characterized in that: The lower rotating shaft (22) also includes a lower rotating ring (222) and a plurality of first reinforcing ribs (223). The lower rotating ring (222) is sleeved on the outer wall of the lower rotating cylinder (221). The bottom of the lower rotating ring (222) is flush with the bottom of the lower rotating cylinder (221). The lower rotating ring (222) is connected to the connecting base plate (21). The plurality of first reinforcing ribs (223) are evenly distributed around the lower rotating cylinder (221). The first reinforcing ribs (223) are right-angled triangles. The two right-angled sides of the first reinforcing ribs (223) are each connected to the lower rotating cylinder (221) and the lower rotating ring (222).

7. The steel box girder support shaft for steel box girder rotation construction according to claim 1, characterized in that: The upper rotating shaft (23) also includes an upper rotating ring (234), a top plate (235), and a plurality of second reinforcing ribs (236). The upper rotating ring (234) is sleeved on the outer wall of the upper rotating cylinder (231). The top of the upper rotating ring (234) is flush with the top of the upper rotating cylinder (231). The top plate (235) is located on the top of the upper rotating cylinder (231) and is perpendicular to the axis of the upper rotating cylinder (231). The upper rotating ring (234) is connected to the top plate (235). The top plate (235) is fixed to the steel box girder. The plurality of second reinforcing ribs (236) are evenly distributed around the circumference of the upper rotating cylinder (231). The second reinforcing ribs (236) are right-angled triangles. The two right-angled sides of the second reinforcing ribs (236) are each connected to the upper rotating cylinder (231) and the upper rotating ring (234).

8. The steel box girder support shaft for steel box girder rotation construction according to claim 1, characterized in that: The outer diameter of the upper rotating cylinder (231) is 390mm, the inner diameter of the lower rotating cylinder (221) is 414mm, and the minimum fitting clearance is 24mm.

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