Bridge swivel support capable of monitoring stress and displacement

Abstract

The application provides a bridge swivel support capable of monitoring stress and displacement, and relates to the technical field of bridge swivel supports, which comprises an upper turntable, a lower turntable, a basin base, a cylindrical cavity, a polytetrafluoroethylene sliding plate, an elastomer, a circular groove, a force sensor, an electrical control console one, a displacement monitoring unit and an electrical control console two; the force sensor is used to collect and record the force transmitted by the elastomer during bridge swivel, the stress data collected by multiple force sensors are analyzed, whether the upper turntable is inclined can be inferred in time, and the design of the laser ranging head is used to continuously monitor the displacement change of the rotating part of the upper turntable; according to the data difference measured by different displacement monitoring units at the same time, the inclination of the upper turntable can be judged, the data of the two are verified with each other, the accuracy of bridge swivel construction monitoring is effectively ensured, and reliable support is provided for construction safety and quality.

Description

Technical Field

[0001] This application relates to the field of bridge slewing bearing technology, and in particular to a bridge slewing bearing capable of monitoring stress and displacement. Background Technology

[0002] In bridge structures, slewing bearings typically consist of two parts: the upper part is connected to the main bridge structure, and the lower part is connected to the piers or abutments. The function of slewing bearings is to allow the bridge to rotate under different loads, thereby reducing bridge deformation and stress, and ensuring the bridge's safety and stability. However, this traditional structure lacks effective means for real-time continuous monitoring of the upper turntable's state during bridge rotation. It cannot promptly capture dynamic changes in the upper turntable's state during rotation, which means that abnormal situations cannot be detected and addressed immediately, thus increasing construction risks. Utility Model Content

[0003] This application provides a bridge slewing bearing that can monitor stress and displacement, aiming to solve the problem that traditional slewing bearings lack real-time continuous monitoring methods, cannot capture the dynamic changes in the state of the upper turntable during the slewing process in a timely manner, and thus make it difficult to detect and deal with abnormal situations in a timely manner, thereby increasing construction risks.

[0004] To address the aforementioned technical problems, this application provides a bridge slewing support capable of monitoring force and displacement, comprising an upper turntable, a lower turntable, and a basin-shaped base. The top of the basin-shaped base has a vertically downward-extending cylindrical cavity. The inner wall of the cylindrical cavity is respectively provided with a polytetrafluoroethylene (PTFE) sliding plate and an elastomer. Multiple circular grooves are formed on the bottom wall of the cylindrical cavity. Force sensors are installed between the bottom wall and the inner wall of each circular groove. The force sensors are electrically connected to a digital control console via a control line. The top of the force sensors is connected to the bottom of the PTFE sliding plate. Multiple circumferentially distributed displacement monitoring units, all located below the bottom of the upper turntable, are installed on the basin-shaped base. The displacement monitoring units are electrically connected to a digital control console via a control line.

[0005] In some implementations, the lower surface of the upper turntable has a spherical surface one at its center, and a mating groove is formed at the center of the surface of the spherical surface one. The top of the lower turntable has a spherical surface two that matches the spherical surface one. A mating block that matches the mating groove is fixedly connected to the center of the surface of the spherical surface two. A cylindrical protrusion that fits against the inner wall of the cylindrical cavity is fixedly connected to the bottom of the lower turntable. The elastomer is connected between the top of the polytetrafluoroethylene sliding plate and the bottom of the cylindrical protrusion.

[0006] In some implementations, the top of the upper turntable is fixedly connected to a plurality of vertically upward and circumferentially distributed upper anchor rods, and the bottom of the basin-shaped base is fixedly connected to a plurality of vertically downward and circumferentially distributed lower anchor rods.

[0007] In some implementations, the displacement monitoring unit includes an adjustable support connected to a basin-shaped base, with a height-adjustable laser ranging unit located above the top of the adjustable support.

[0008] In some implementations, the laser ranging unit includes a steel housing and a steel cover embedded in the inner circumference of the side wall of the steel housing. A bowl-shaped block is embedded between the side wall of the steel cover and the bottom wall of the steel housing. A bowl-shaped seat embedded in the top wall of the steel cover is connected to the upper surface of the bowl-shaped block. A laser ranging head is installed at the top center of the bowl-shaped seat. The laser ranging head protrudes from the outside of the steel cover through the central hole at the top of the steel cover.

[0009] In some implementations, the bottom of the steel casing is connected to multiple independent and circumferentially distributed upper threaded sleeves via bearings. Each upper threaded sleeve is threaded to a threaded rod, and each threaded rod is threaded to a lower threaded sleeve. The lower threaded sleeve is fixedly connected to an adjusting support. A large gear is connected to the bottom center of the steel casing via bearings. Multiple matching small gears are connected to the surface of the large gear and fixedly connected to the upper threaded sleeves. A hexagonal rotating sleeve is fixedly connected to the bottom of the large gear.

[0010] In some implementations, the bottom of the bowl-shaped block is provided with a dome support hole that communicates with the bottom cavity of the steel casing, and the center of the bottom wall of the adjusting support is fixedly connected with a dome support column that matches the dome support hole.

[0011] By adopting the above technical solution, this application has the following beneficial effects compared with the prior art:

[0012] Force sensors are used to collect and record the forces transmitted by the elastic body when the bridge rotates. By analyzing the differences in force data collected by multiple force sensors, it is possible to infer in a timely manner whether the upper turntable is tilted.

[0013] The laser rangefinder is designed to continuously monitor the displacement changes of the rotating part of the upper turntable. Based on the differences in data measured by different displacement monitoring units at the same time, the tilt of the upper turntable can be determined. The data from both are mutually verified, which effectively ensures the accuracy of bridge rotation construction monitoring and provides reliable support for construction safety and quality. Attached Figure Description

[0014] To more clearly illustrate the related technologies or the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the related technologies or the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application, and not all embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A schematic diagram of the overall structure of a bridge slewing support capable of monitoring force and displacement, provided for an embodiment of this application;

[0016] Figure 2 Exploded view of a bridge slewing bearing capable of monitoring stress and displacement, as provided in this application embodiment. Figure 1 ;

[0017] Figure 3 A schematic diagram of the exploded structure of a bridge slewing bearing capable of monitoring stress and displacement, provided in an embodiment of this application. Figure 2 ;

[0018] Figure 4 for Figure 3 Schematic diagram of the upper and middle turntables;

[0019] Figure 5 for Figure 1 Schematic diagram of the overall and cross-sectional structure of the displacement monitoring unit;

[0020] Figure 6 for Figure 5 Exploded structural diagram of the displacement monitoring unit;

[0021] Figure 7 for Figure 1 A schematic diagram of the bottom structure of the basin-type base.

[0022] The labels in the above attached figures are as follows: 1. Upper turntable; 11. Spherical surface one; 12. Docking groove; 13. Upper anchor rod; 2. Lower turntable; 21. Spherical surface two; 22. Docking block; 23. Cylindrical protrusion; 3. Basin-shaped base; 31. Cylindrical cavity; 32. PTFE sliding plate; 33. Elastomer; 34. Circular groove; 35. Force sensor; 36. Digital control console one; 37. Lower anchor rod; 4. Displacement monitoring unit; 41. Adjustable support; 42. Steel sleeve; 43. Steel sleeve cover; 44. Bowl-shaped block; 45. Bowl-shaped seat; 46. Laser rangefinder head; 47. Upper threaded sleeve; 48. Threaded rod; 49. Lower threaded sleeve; 410. Large gear; 411. Small gear; 412. Hexagonal rotating sleeve; 413. Dome support hole; 414. Dome support column; 5. Digital control console two. Detailed Implementation

[0023] Example 1: Referring to the figure, a bridge slewing bearing capable of monitoring force and displacement includes an upper turntable 1, a lower turntable 2, and a basin-shaped base 3. The top of the basin-shaped base 3 has a vertically downward extending cylindrical cavity 31. The inner wall of the cylindrical cavity 31 is provided with a polytetrafluoroethylene sliding plate 32 and an elastomer 33. The lower surface of the upper turntable 1 has a spherical curved surface 11 at its center. The surface of the spherical curved surface 11 has a mating groove 12 at its center. The top of the lower turntable 2 has a spherical curved surface 21 that matches the spherical curved surface 11. The surface of the spherical curved surface 21 is fixedly connected to a mating block 22 that matches the mating groove 12. The bottom of the lower turntable 2 is fixedly connected to a cylindrical protrusion 23 that fits against the inner wall of the cylindrical cavity 31. The elastomer 33 is connected between the top of the polytetrafluoroethylene sliding plate 32 and the bottom of the cylindrical protrusion 23.

[0024] Reference Figures 1-3 The top of the upper turntable 1 is fixedly connected with multiple vertically upward and circumferentially distributed upper anchor rods 13, which are used to firmly anchor the upper turntable 1 to the superstructure of the bridge, so that the upper turntable 1 and the superstructure can work together to bear force and rotate synchronously when the bridge rotates, thus ensuring the integrity of the structure. The bottom of the basin-type base 3 is fixedly connected with multiple vertically downward and circumferentially distributed lower anchor rods 37, which can firmly fix the basin-type base 3 to the lower foundation of the bridge, providing stable support for the entire rotating support.

[0025] Reference Figure 2 Based on the above technical solution, it also includes four circular grooves 34 formed on the bottom wall of the cylindrical cavity 31. Force sensors 35 are installed between the bottom wall and the inner wall of the circular grooves 34. The force sensors 35 are electrically connected to the digital control console 36 via a control line. The top of the force sensors 35 is connected to the bottom of the polytetrafluoroethylene sliding plate 32. When the bridge is rotating, the force sensors 35 collect and record the force transmitted by the elastic body 33 at each moment of rotation through the digital control console 36. Furthermore, the force data collected by the four force sensors 35 can be observed to infer whether the turntable 1 on the bridge rotation support has tilted. If the force data collected by one or two of them differs too much from the force data collected at the same time, it can be inferred that the turntable 1 on the rotation support has tilted.

[0026] Example 2: Referring to the figure, based on Example 1 above, in order to ensure the accuracy of bridge rotation construction monitoring, the difference is that four circumferentially distributed displacement monitoring units 4 are added to the basin base 3, and the position of each displacement monitoring unit 4 corresponds to the bottom of the upper turntable 1.

[0027] Each displacement monitoring unit 4 includes an adjustable support 41, which is connected to the surface of the basin base 3 by screws. A height-adjustable laser ranging part is provided above the top of the adjustable support 41. The laser ranging part includes a steel housing 42 and a steel cover 43 embedded in the inner circumference of the side wall of the steel housing 42. A bowl-shaped block 44 is embedded between the side wall of the steel cover 43 and the bottom wall of the steel housing 42. A bowl-shaped seat 45 embedded in the top wall of the steel cover 43 is connected to the upper surface of the bowl-shaped block 44. A laser ranging head 46 is installed at the top center of the bowl-shaped seat 45. The laser ranging head 46 protrudes from the outside of the steel cover 43 through the central hole at the top of the steel cover 43. The laser ranging head 46 is electrically connected to the digital control console 5 via control line 2.

[0028] During the bridge rotation construction, these four displacement monitoring units 4 can continuously monitor the tilt of the rotating part of the turntable 1 on the bridge rotation support, and collect and record data through the digital control console 2 5. If the displacement change data measured by one or two displacement monitoring units 4 is significantly different from the data measured by other displacement monitoring units 4 at the same time, it can be inferred that the turntable 1 on the bridge rotation support has tilted. The purpose of this design is to ensure that when there is a large difference in the force data obtained by the force sensor 35, the displacement data obtained by the displacement monitoring units 4 at the same time can be used for mutual verification, thereby ensuring the accuracy of bridge rotation construction monitoring.

[0029] To facilitate height adjustment of each displacement monitoring unit 4, the bottom of the steel housing 42 is connected to multiple independent, circumferentially distributed upper threaded sleeves 47 via bearings. Each upper threaded sleeve 47 is threaded to a threaded rod 48, and each threaded rod 48 is threaded to a lower threaded sleeve 49. The lower threaded sleeve 49 is fixedly connected to the adjusting support 41. A large gear 410 is connected to the center of the bottom of the steel housing 42 via bearings. Multiple matching small gears 411 are connected to the surface of the large gear 410 and fixedly connected to the upper threaded sleeves 47. A hexagonal rotating sleeve 412 is fixedly connected to the bottom of the large gear 410. When the heights of the four displacement monitoring units 4 are inconsistent, the large gear 410 can be driven by twisting the hexagonal rotating sleeve 412. Rotation: Since the large gear 410 is matched with multiple small gears 411 and the small gears 411 are fixed on the upper threaded sleeve 47, the rotation of the large gear 410 will drive the small gears 411 and the upper threaded sleeve 47 to rotate synchronously. The upper threaded sleeve 47 is connected to the threaded rod 48 through threads. Its rotation will cause the threaded rod 48 to move axially. The threaded rod 48 is connected to the lower threaded sleeve 49 fixed on the adjusting support 41. Under the action of thread transmission, the axial movement of the threaded rod 48 will drive the entire steel sleeve 42 to rise or fall, thereby realizing height adjustment. This ensures that the laser rangefinders 46 in the four displacement monitoring units 4 are at the same height, so that the displacement monitoring horizontal plane is parallel to the outer surface of the upper turntable 1.

[0030] The bottom of the bowl-shaped block 44 is provided with a dome support hole 413 that communicates with the bottom cavity of the steel casing 42. The center of the bottom wall of the adjusting support 41 is fixedly connected with a dome support column 414 that matches the dome support hole 413. Through the cooperation between the dome support column 414 and the dome support hole 413, stable support can be provided for the laser ranging unit.

[0031] It should be noted that the several embodiments shown above in this application are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. It should also be noted that in the textual description of this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply such an actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements may include not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus; and, without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Furthermore, those skilled in the art can implement or use this application by practicing the several embodiments shown above. Various modifications to the embodiments shown above will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments not shown without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the several embodiments shown above, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bridge slewing bearing capable of monitoring force and displacement, characterized in that, include: Upper turntable (1), lower turntable (2) and basin-shaped base (3); The top of the basin-shaped base (3) is provided with a vertically downward extending cylindrical cavity (31), and the inner wall of the cylindrical cavity (31) is provided with a polytetrafluoroethylene sliding plate (32) and an elastomer (33). Multiple circular grooves (34) are formed on the bottom wall of the cylindrical cavity (31). A force sensor (35) is installed between the bottom wall and the inner wall of the circular groove (34). The force sensor (35) is electrically connected to a digital control console (36) via a control line. The top of the force sensor (35) is connected to the bottom of the polytetrafluoroethylene sliding plate (32). Multiple displacement monitoring units (4) are installed on the basin base (3) and are all located below the bottom of the upper turntable (1). The displacement monitoring units (4) are electrically connected to a digital control console (5) via a control line.

2. The bridge slewing bearing capable of monitoring force and displacement according to claim 1, characterized in that, The lower surface of the upper turntable (1) is provided with a spherical surface one (11) at its center. A mating groove (12) is provided at the center of the surface of the spherical surface one (11). The top of the lower turntable (2) is provided with a spherical surface two (21) that is adapted to the spherical surface one (11). A mating block (22) that is adapted to the mating groove (12) is fixedly connected to the center of the surface of the spherical surface two (21). A cylindrical protrusion (23) that fits against the inner wall of the cylindrical cavity (31) is fixedly connected to the bottom of the lower turntable (2). The elastic body (33) is connected between the top of the polytetrafluoroethylene sliding plate (32) and the bottom of the cylindrical protrusion (23).

3. The bridge slewing bearing capable of monitoring force and displacement according to claim 1, characterized in that, The top of the upper turntable (1) is fixedly connected with a plurality of vertically upward and circumferentially distributed upper anchor rods (13), and the bottom of the basin-type base (3) is fixedly connected with a plurality of vertically downward and circumferentially distributed lower anchor rods (37).

4. The bridge slewing bearing capable of monitoring force and displacement according to claim 1, characterized in that, The displacement monitoring unit (4) includes an adjustable support (41) connected to the basin base (3), and an adjustable laser ranging part is provided on the top of the adjustable support (41).

5. The bridge rotation support capable of monitoring force and displacement according to claim 4, characterized in that, The laser ranging unit includes a steel housing (42) and a steel cover (43) embedded in the inner circumference of the side wall of the steel housing (42). A bowl-shaped block (44) is embedded between the side wall of the steel cover (43) and the bottom wall of the steel housing (42). A bowl-shaped seat (45) embedded in the top wall of the steel cover (43) is connected to the upper surface of the bowl-shaped block (44). A laser ranging head (46) is installed at the top center of the bowl-shaped seat (45). The laser ranging head (46) protrudes out of the outside of the steel cover (43) through the central hole at the top of the steel cover (43).

6. The bridge slewing bearing capable of monitoring force and displacement according to claim 5, characterized in that, The bottom of the steel casing (42) is connected by bearings to multiple independent and circumferentially distributed upper threaded sleeves (47). The upper threaded sleeves (47) are threaded to threaded rods (48), and the threaded rods (48) are threaded to lower threaded sleeves (49). The lower threaded sleeves (49) are fixedly connected to the adjusting support (41). The bottom center of the steel casing (42) is connected by bearings to a large gear (410). The surface of the large gear (410) is connected to multiple matching and fixedly connected small gears (411) on the upper threaded sleeves (47). The bottom of the large gear (410) is fixedly connected to a hexagonal rotating sleeve (412).

7. The bridge rotation support capable of monitoring force and displacement according to claim 6, characterized in that, The bottom of the bowl-shaped block (44) is provided with a dome support hole (413) that communicates with the bottom cavity of the steel casing (42), and the center of the bottom wall of the adjusting support (41) is fixedly connected with a dome support column (414) that cooperates with the dome support hole (413).

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