A swing bridge

Abstract

The utility model discloses a kind of rotary bridge, including pier and the beam body installed on its upper end, the lower end of the pier is connected with spherical hinge upper support, and the lower surface center of spherical hinge upper support is connected with the upper surface center of spherical hinge lower support by pin shaft, sliding sheet is also laid between the lower surface of spherical hinge upper support and the upper surface of spherical hinge lower support, and high-end lubricating grease is also daubed between the lower surface of spherical hinge upper support and the upper surface of spherical hinge lower support.The utility model in the process of rotating, the length of steel strand exposed in the part outside pier is shorter, and connected with winding board in group, as long as not group steel strand is synchronously pulled apart, it can avoid the occurrence of safety accident, in addition, through the hydraulic jack of PLC hydraulic synchronous closed-loop control system series connection, it can guarantee that pier can only rotate shorter angle within the stroke of hydraulic jack, and then can gradually rotate pier, it is beneficial to guarantee the stable rotation of pier.

Description

Technical Field

[0001] This utility model relates to the field of rotating bridge technology, specifically a rotating bridge. Background Technology

[0002] In the field of bridge construction, when crossing complex terrain or existing transportation facilities such as existing railways, highways, waterways, and valleys, traditional construction methods such as cast-in-place scaffolding and cantilever casting face huge challenges. These methods not only have long construction cycles and high costs, but also cause long-term interference to existing traffic below and even pose safety risks. Therefore, a safer, more efficient, and less environmentally impactful crossing construction technology is needed. The rotating bridge technology has emerged to meet this need. Its core principle is to prefabricate or cast the superstructure of the bridge as a whole at the non-crossing position. After the structure is completed, the entire superstructure is rotated by a certain angle through a rotating system set at the bottom of the bridge body, and finally precisely closed to the design position. However, existing swing bridges require traction mechanisms to pull steel strands during rotation. Each steel strand needs to withstand several tons of tension, which poses a significant safety hazard if the steel strand breaks. In addition, existing traction mechanisms are generally two of equal angles, working simultaneously to ensure the stability of the bridge's rotation. However, the two traction mechanisms are not synchronized during rotation. If they cannot be completely synchronized, the stability of the bridge's rotation cannot be guaranteed.

[0003] Therefore, a type of rotating bridge is needed to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a rotating bridge to solve the problems mentioned in the background art, such as the significant safety hazards and inability to guarantee the stability of the bridge during rotation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A rotating bridge includes a pier and a beam installed on its upper end. The lower end of the pier is connected to an upper ball joint bearing, and the center of the lower surface of the upper ball joint bearing is connected to the center of the upper surface of a lower ball joint bearing via a pin. A sliding plate is laid between the lower surface of the upper ball joint bearing and the upper surface of the lower ball joint bearing, and a high-grade lubricant is applied between the two surfaces. The lower ball joint bearing is installed on a pile foundation below the ground surface, and an annular sliding track is provided on the pile foundation, coaxially arranged on the ball joint bearing. On the outer side of the hinged support, six sets of steel pipe supports are evenly distributed at the lower position of the annular slide, and the two are slidably connected. The upper end of the steel pipe supports is connected to the lower end of the pier. Six sets of sand boxes are also provided on the annular slide, with two sand boxes in each set, and one set of sand boxes is provided between each adjacent steel pipe support. The lower surface of the pier is connected to the annular slide through a positioning mechanism, and a support ring is connected to the outer side of the lower end of the pier through a support rotation mechanism. The support ring is installed on the pile foundation through a limiting mechanism.

[0006] Furthermore, the limiting mechanism includes an outer sliding ring coaxial with the annular slide, and the outer sliding ring is disposed on the outside of the annular slide. The upper surface of the annular slide is provided with limiting female teeth at equal angles, and the support ring is slidably connected to the annular slide. The lower surface of the support ring is distributed with limiting female teeth at equal angles, and the limiting female teeth are engaged with the limiting female teeth.

[0007] Furthermore, the jacking and rotating mechanism includes a steel strand wound inside the lower end of the pier and extending to the outside of the pier. The end of the steel strand is connected to a rope-winding plate. A hydraulic jack is installed at an equal angle on the upper surface of the support ring, and the support ring is axially connected to the fixed end of the hydraulic jack. The rope-winding plate is connected to the telescopic end of the hydraulic jack.

[0008] Furthermore, the structure consisting of the rope plate, steel strand, and hydraulic jacks is distributed at equal angles on the outer side of the lower end of the bridge pier, and all the hydraulic jacks are connected through a PLC hydraulic synchronous closed-loop control system.

[0009] Furthermore, the positioning mechanism includes recessed grooves evenly distributed on the lower surface of the pier, and limiting tubes evenly distributed in the recessed grooves. The upper end of a corresponding limiting rod extends into the lower opening of the limiting tube, and the lower end of the limiting rod is fixedly connected to the upper end of the corresponding positioning sub-tooth. Positioning female teeth are evenly distributed on the higher upper surface of the annular slide, and the positioning sub-tooths are engaged with the positioning female teeth.

[0010] Furthermore, the pier and the support ring rotate in the same direction.

[0011] Compared with the prior art, the beneficial effects of this utility model are: during the rotation of the rotating bridge, the length of the steel strands exposed outside the pier is relatively short, and they are connected in groups to the rope winding plate. As long as the groups of steel strands are not broken simultaneously, safety accidents can be avoided. In addition, the hydraulic jacks connected in series through the PLC hydraulic synchronous closed-loop control system can ensure that the pier can only rotate a short angle within the stroke of the hydraulic jack, thus allowing the pier to rotate gradually, which is conducive to ensuring the stable rotation of the pier. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the connection structure between the bridge pier and the outer slip ring of this utility model; Figure 3 This utility model Figure 2 Enlarged structural diagram of point A in the middle; Figure 4 This is a schematic diagram of the separate structure of the outer slip ring and the support ring of this utility model; Figure 5 This utility model Figure 4 Enlarged structural diagram of point B; Figure 6 This is a schematic diagram of the bridge pier structure from below; Figure 7 This is a schematic cross-sectional view of the connection between the bridge pier and the outer slip ring of this utility model; Figure 8 This utility model Figure 7 A magnified structural diagram of point C.

[0013] In the diagram: 1. Beam; 2. Pier; 3. Outer slip ring; 4. Support ring; 5. Hydraulic jack; 6. Rope winding plate; 7. Steel strand; 8. Limiting tooth; 9. Lower ball joint support; 10. Circular slide; 11. Steel pipe support; 12. Sand box; 13. Positioning tooth; 14. Positioning tooth; 15. Limiting rod; 16. Inner groove; 17. Limiting tooth; 18. Pin; 19. Limiting tube; 20. Upper ball joint support. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Please see Figure 1-8 This utility model provides a technical solution: A rotating bridge includes a pier 2 and a beam 1 installed on its upper end. The lower end of the pier 2 is connected to a ball joint upper support 20, and the center of the lower surface of the ball joint upper support 20 is connected to the center of the upper surface of a ball joint lower support 9 via a pin 18. A sliding plate is laid between the lower surface of the ball joint upper support 20 and the upper surface of the ball joint lower support 9, and a high-grade lubricant is applied between the lower surface of the ball joint upper support 20 and the upper surface of the ball joint lower support 9. The ball joint lower support 9 is installed on the ground surface. On the following pile foundation, an annular slide rail 10 is also provided. The annular slide rail 10 is coaxially arranged on the outside of the ball joint lower support 9. Six sets of steel pipe support legs 11 are distributed at equal angles on the lower upper surface of the annular slide rail 10, and the two are slidably connected. The upper end of the steel pipe support leg 11 is connected to the lower end of the pier 2. Six sets of sand boxes 12 are also provided on the annular slide rail 10, and two sand boxes 12 are provided in each set. A set of sand boxes 12 is provided between each adjacent steel pipe support leg 11.

[0015] The lower surface of pier 2 is connected to the annular slide 10 via a positioning mechanism, and a support ring 4 is connected to the outer side of the lower end of pier 2 via a support and rotation mechanism. The support and rotation mechanism includes a steel strand 7 wound inside the lower end of pier 2 with its end extending outside the pier 2. A rope-winding plate 6 is connected to the end of the steel strand 7. Hydraulic jacks 5 are installed at equal angles on the upper surface of the support ring 4, and the support ring 4 is shaft-connected to the fixed end of the hydraulic jack 5. The rope-winding plate 6 is connected to the telescopic end of the hydraulic jack 5. The structure consisting of the rope-winding plate 6, the steel strand 7, and the hydraulic jack 5 is distributed at equal angles on the outer side of the lower end of pier 2. All hydraulic jacks 5 are connected through a PLC hydraulic synchronous closed-loop control system. The positioning mechanism includes recessed grooves 16 evenly distributed on the lower surface of the pier 2, and limit tubes 19 are evenly distributed in the recessed grooves 16. The upper end of the corresponding limit rod 15 extends into the lower opening of the limit tube 19, and the lower end of the limit rod 15 is fixedly connected to the upper end of the corresponding positioning tooth 14. The upper surface of the annular slide 10 at a higher position has positioning teeth 13 evenly distributed, and the positioning teeth 14 are meshed with the positioning teeth 13. The pier 2 and the support ring 4 rotate in the same direction.

[0016] The support ring 4 is installed on the pile foundation by a limiting mechanism. The limiting mechanism includes an outer sliding ring 3 coaxial with the annular slide 10, and the outer sliding ring 3 is located on the outside of the annular slide 10. The upper surface of the annular slide 10 is provided with limiting female teeth 8 at equal angles, and the support ring 4 is slidably connected to the annular slide 10. The lower surface of the support ring 4 is provided with limiting female teeth 17 at equal angles, and the limiting female teeth 17 are engaged with the limiting female teeth 8.

[0017] In use, the PLC hydraulic synchronous closed-loop control system ensures that all hydraulic jacks 5 are filled with the same amount of hydraulic oil, thereby enabling all hydraulic jacks 5 to apply the same thrust to the pier 2. During the process, the exposed part of the steel strand 7 outside the pier 2 will pull the pier 2 to rotate. The pier 2 will exert a force on the hydraulic jack 5 in the opposite direction, which will act on the outer slip ring 3. Since the outer slip ring 3 is ring-shaped, the force can be evenly applied to the pile foundation. During the rotation of pier 2, the meshing of positioning female tooth 13 and positioning female tooth 14 enables pier 2 to rotate in only one direction. After the telescopic end of the hydraulic jack 5 extends a certain length, the hydraulic oil inside the hydraulic jack 5 is discharged synchronously through the PLC hydraulic synchronous closed-loop control system. During the process, the hydraulic jack 5 will be pulled, which will cause the support ring 4 to move upward, causing the limit female tooth 8 and the limit female tooth 17 to disengage. Then the support ring 4 rotates on the outer slip ring 3. After the telescopic end of the hydraulic jack 5 is completely retracted, the support ring 4 moves downward under the action of gravity, and causes the limit female tooth 8 and the limit female tooth 17 to re-engage. By repeating the above process, pier 2 can be gradually rotated to a suitable angle so that the structure installed on the upper part of pier 2 can be closed.

[0018] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotating bridge, comprising piers (2) and a beam (1) installed on its upper end, characterized in that: The lower end of the pier (2) is connected to a ball joint upper support (20), and the center of the lower surface of the ball joint upper support (20) is connected to the center of the upper surface of the ball joint lower support (9) through a pin (18). A sliding plate is also laid between the lower surface of the ball joint upper support (20) and the upper surface of the ball joint lower support (9), and high-grade grease is also applied between the lower surface of the ball joint upper support (20) and the upper surface of the ball joint lower support (9). The ball joint lower support (9) is installed on a pile foundation below the ground surface, and an annular slide (10) is also provided on the pile foundation. The annular slide (10) is coaxially arranged on the outside of the ball joint lower support (9). (10) Six sets of steel pipe support legs (11) are distributed at equal angles on the lower upper surface and are slidably connected. The upper end of the steel pipe support legs (11) is connected to the lower end of the pier (2). Six sets of sand boxes (12) are also provided on the annular slide (10), and there are two sand boxes (12) in each set. A set of sand boxes (12) is provided between each adjacent steel pipe support leg (11). The lower surface of the pier (2) is connected to the annular slide (10) through a positioning mechanism. The outer side of the lower end of the pier (2) is connected to a support ring (4) through a top rotation mechanism. The support ring (4) is installed on the pile foundation through a limiting mechanism.

2. A rotating bridge according to claim 1, characterized in that, The limiting mechanism includes an outer sliding ring (3) coaxial with the annular slide (10), and the outer sliding ring (3) is located on the outside of the annular slide (10). The upper surface of the annular slide (10) is provided with limiting female teeth (8) at equal angles, and the support ring (4) is slidably connected to the annular slide (10). The lower surface of the support ring (4) is provided with limiting female teeth (17) at equal angles, and the limiting female teeth (17) are engaged with the limiting female teeth (8).

3. A rotating bridge according to claim 2, characterized in that, The jacking and rotating mechanism includes a steel strand (7) wound inside the lower end of the pier (2) and with its end extending outside the pier (2). The end of the steel strand (7) is connected to a rope-winding plate (6). A hydraulic jack (5) is installed at equal angles on the upper surface of the support ring (4), and the support ring (4) is axially connected to the fixed end of the hydraulic jack (5). The rope-winding plate (6) is connected to the telescopic end of the hydraulic jack (5).

4. A rotating bridge according to claim 3, characterized in that, The structure consisting of the rope plate (6), steel strand (7) and hydraulic jack (5) is distributed at equal angles on the outer side of the lower end of the pier (2), and all the hydraulic jacks (5) are connected through a PLC hydraulic synchronous closed-loop control system.

5. A rotating bridge according to claim 4, characterized in that: The positioning mechanism includes recessed grooves (16) evenly distributed on the lower surface of the pier (2), and locating tubes (19) evenly distributed in the recessed grooves (16). The upper end of a corresponding locating rod (15) extends into the lower opening of the locating tube (19), and the lower end of the locating rod (15) is fixedly connected to the upper end of the corresponding locating tooth (14). The upper surface of the annular slide (10) at a higher position has locating teeth (13) evenly distributed, and the locating teeth (14) are engaged with the locating teeth (13).

6. A rotating bridge according to claim 5, characterized in that: The pier (2) and the support ring (4) rotate in the same direction.

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