Speed locking type tensile ball steel support
By introducing a velocity locker and friction sub structure into the ball steel support, the problem that the ball steel support cannot transmit seismic force under earthquakes is solved, and the distribution of seismic force between the bridge piers is realized, the construction cost is reduced, and it has good economic and practicality is achieved.
Patent Information
- Application Number
- CN202421894021.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-07
AI Technical Summary
The existing ball steel support cannot effectively transmit seismic force to the bridge pier under the action of earthquakes, and does not have the ability to withstand tension, resulting in excessive stress on the fixed pier or increased construction costs.
A speed locking tensile ball steel support is designed. By setting a speed locker between the upper seat plate and the bottom basin, the locking function between the upper seat plate and the bottom basin is realized under earthquake action, and the upper end of the bottom basin is protruded into the C-shaped notch of the upper seat plate to withstand tension, combining the friction pair structure that is slidingly connected to the plane and the spherical surface.
Under the action of an earthquake, the seismic force of the main beam is effectively transmitted to each bridge pier, reducing the cost of the bridge pier construction, and returning to the conventional displacement working state after the earthquake is over. It has a simple structure, low cost, convenient installation, and good economic and practicality.
Smart Images
Figure CN223061434U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bridge bearings, and specifically relates to a speed-locking tensile spherical steel bearing. Background Technique
[0002] A bridge bearing is an important component connecting the upper structure and the lower structure of a bridge. It reliably transfers the reaction force and deformation generated by the load of the upper structure to the lower structure through its own structure, ensuring the coordinated deformation of the upper and lower structures of the bridge under factors such as temperature load, concrete shrinkage and creep.
[0003] At present, spherical steel bearings on highway and railway bridges are divided into fixed type, single-direction type and multi-direction type. Single-direction and multi-direction movable spherical bearings need to meet the requirements of vertical pressure and horizontal bearing capacity, and at the same time need to meet the requirements of horizontal deformation and beam body rotation. Under the action of conventional loads, only one pier in the longitudinal direction of a continuous beam bridge is provided with a fixed bearing (fixed pier), and the remaining piers (movable piers) are provided with movable bearings to adapt to the deformation caused by loads such as temperature. Under the action of an earthquake, only one fixed pier bears the earthquake action, resulting in a large force on the fixed pier and making it difficult to design, or the fixed pier needs a large volume to meet the design requirements. In addition, some bridge bearings (such as curved bridges) need to bear tensile forces. If they cannot bear tensile forces, the bridge may overturn.
[0004] The spherical steel bearings of the prior art cannot meet the requirement that the main beam transfers the earthquake force to the pier through the upper seat plate, speed lock and bottom basin under the action of an earthquake, and the bearing does not have the ability to bear tensile forces. Content of the Utility Model
[0005] The purpose of the utility model is to design a speed-locking tensile spherical steel bearing aiming at the deficiencies of the prior art. It adopts a spherical steel bearing structure with a speed lock arranged between the upper seat plate and the bottom basin to realize the locking function of the relative displacement between the upper seat plate and the bottom basin under the action of an earthquake, so that there is no relative displacement between the upper seat plate and the bottom basin, to meet the requirement that the earthquake force of the main beam can be transferred to the pier through the upper seat plate, speed lock and bottom basin. The earthquake force of the main beam can be distributed among the piers, greatly reducing the construction cost of the piers. After the earthquake, the spherical steel bearing can return to the normal displacement working state. By the convexity at the upper end of the bottom basin being stuck in the C-shaped notch of the upper seat plate, the bearing can bear tensile forces. The structure is simple, the manufacturing cost is low, the installation is convenient, and it has good economic practicality and popularization prospects.
[0006] The specific technical solution for achieving the purpose of the present utility model is as follows: A speed-locking tensile spherical steel bearing, comprising an upper seat plate, a spherical crown liner, and a bottom basin. A "C"-shaped notch is provided at the lower end of the upper seat plate, and the convexity at the upper end of the bottom basin is clamped in the "C"-shaped notch. The spherical crown liner is placed between the upper seat plate and the bottom basin. The upper seat plate and the spherical crown liner are in planar sliding connection, and the bottom basin and the spherical crown liner are in spherical sliding connection. The feature is that speed lockers are symmetrically arranged between the end of the upper seat plate and the bottom basin. One end of the speed locker is hinged to the lower end of the upper seat plate through an A ear hinge; the other end of the speed locker is hinged to the middle of the bottom basin through a B ear hinge; the convexity at the upper end of the bottom basin is clamped in the "C"-shaped notch, and both ends are fixed with sealing plates.
[0007] The convexity at the upper end of the bottom basin and the "C"-shaped notch at the upper end of the bottom basin bear tensile forces.
[0008] The gaps between the speed lockers in the transverse bridge direction and the upper part of the bottom basin are not less than 10 mm.
[0009] The locking speed of the speed locker is ≥1 mm / s.
[0010] A first friction pair is provided at the planar connection between the upper seat plate and the spherical crown liner; a second friction pair is provided at the spherical contact between the bottom basin and the spherical crown liner.
[0011] The first friction pair is composed of mirror stainless steel and a modified ultra-high molecular weight polyethylene plate; the second friction pair is composed of spherical chromium plating and a modified ultra-high molecular weight polyethylene plate.
[0012] The thickness of the mirror stainless steel is not less than 2 mm; the thickness of the spherical chromium plating is not less than 100 μm; the thickness of the modified ultra-high molecular weight polyethylene plate is not less than 7 mm; and a grease storage groove with a gap not exceeding 3 mm is provided on the surface in contact with the spherical chromium plating. Grease is provided in the grease storage groove; the grease is 5201 silicone grease.
[0013] Compared with the prior art, the present utility model has the function of locking the relative displacement between the upper seat plate and the bottom basin under earthquake action, so that there is no longer relative displacement between the upper seat plate and the bottom basin, so as to meet the requirement that the seismic force of the main beam can be transmitted to the pier through the upper seat plate, the speed locker, and the bottom basin. The seismic force of the main beam can be distributed among the piers, greatly reducing the construction cost of the piers. After the earthquake, the spherical steel bearing can be restored to the normal displacement working state. By clamping the convexity at the upper end of the bottom basin in the "C"-shaped notch of the upper seat plate, the bearing can bear tensile forces. The structure is simple, the manufacturing cost is low, the installation is convenient, and it has good economic practicality and popularization prospects. Description of the Drawings
[0014] Figure 1 It is a structural schematic diagram of the present utility model;
[0015] Figure 2 Side view of Figure 1 ;
[0016] Figure 3 Schematic diagram of the speed lock structure. Specific implementation mode
[0017] Refer to Figures 1 to 2 , the utility model includes: an upper seat plate 1, a spherical crown liner 3, a bottom basin 5 and a speed lock 6. The upper seat plate 1 is a support plate provided with a "C"-shaped notch 11. The bottom basin 5 is a base with a spherical groove 13 on the top surface, and a protrusion 12 is provided at its upper end for snap connection with the "C"-shaped notch 11. The spherical crown liner 3 is arranged between the upper seat plate 1 and the bottom basin 5, the protrusion 12 is clamped in the "C"-shaped notch 11, the spherical crown liner 3 is in planar sliding connection with the upper seat plate 1, and the spherical crown liner 3 is in spherical sliding connection with the bottom basin 5. Two speed locks 6 are provided at the lower end of the upper seat plate 1 and are symmetrically arranged on both sides of the middle of the bottom basin 5. The speed lock 6 is a spherical plain bearing, and lugs 9 perpendicular to each other are provided at both ends thereof. One lug 9 at one end of the speed lock 6 is hinged to an A-ear hinge seat 7 provided at the lower end of the upper seat plate 1, and the other lug 9 at the other end is hinged to a B-ear hinge seat 14 provided in the middle of the bottom basin 5. During an earthquake, the speed lock 6 can lock the relative displacement between the upper seat plate 1 and the bottom basin 5.
[0018] The upper seat plate 1 and the bottom basin 5 are fixed to the main beam and the pier respectively by means of anchor bolts or welding; a "C"-shaped notch 11 is provided at the lower end of the upper seat plate 1; a protrusion 12 at the upper end of the bottom basin 5 is stuck in the "C"-shaped notch 11, and the spherical crown liner 3 is placed between the upper seat plate 1 and the bottom basin 5; the upper seat plate 1 and the spherical crown liner 3 are in planar sliding connection, and a first friction pair 2 is provided at this connection; the first friction pair 2 includes a mirror stainless steel plate with a pasted thickness of not less than 2 mm provided on the bottom surface of the upper seat plate 1; a planar wear-resistant plate with a thickness of not less than 7 mm is embedded on the upper surface of the spherical crown liner 3, the material of which is a modified ultra-high molecular weight polyethylene plate, and grease storage grooves with a gap of not more than 3 mm are provided on the surface. 5201 silicone grease is provided in the grease storage grooves, and the surface provided with 5201 silicone grease is closely attached to the mirror stainless steel plate, so that a grease film is formed on the contact surface, thereby reducing the wear of the sliding between the upper seat plate 1 and the spherical crown liner 3; the bottom basin 5 and the spherical crown liner 3 are in spherical sliding connection, and a second friction pair 4 is provided at this connection, so that the spherical crown liner 3 and the bottom basin 5 slide back and forth or rotate around the center of the arc surface; the second friction pair 4 includes a spherical chrome-plated layer with a chrome-plated thickness of not less than 100 μm provided in the spherical groove 13 of the bottom basin 5 and a spherical wear-resistant plate embedded in the spherical bottom surface of the spherical crown liner 3. The spherical wear-resistant plate is a modified ultra-high molecular weight polyethylene plate, and grease storage grooves with a gap of not more than 3 mm are provided on the surface. 5201 silicone grease is provided in the grease storage grooves, and the surface provided with 5201 silicone grease is closely attached to the spherical chrome-plated layer, so that a grease film is formed on the contact surface, thereby realizing the relative sliding or rotation of the bearing and reducing wear.
[0019] A speed lock 6 is symmetrically provided between the end of the upper seat plate 1 and the bottom basin 5. One end of the speed lock 6 is hinged to the end of the upper seat plate 1 through an A ear hinge 7, and the other end of the speed lock 6 is hinged to a B ear hinge 14 provided in the middle of the bottom basin 5 to adapt to the angular deformation between the upper seat plate 1 and the bottom basin 5. The locking speed of the speed lock 6 is ≥1 mm / s, and the gap between the transverse bridge direction and the upper part of the bottom basin 5 is not less than 10 mm; the protrusion 12 at the upper end of the bottom basin 5 is stuck in the "C"-shaped notch 11, and both ends are fixed by a sealing plate 8.
[0020] Refer to Figure 3 , the speed lock 6 is a spherical plain bearing with lugs 9 provided at both ends, and the two lugs 9 are perpendicular to each other; one lug 9 at one end of the speed lock 6 is hinged to the A ear hinge 7 provided under the upper seat plate 1, and the other lug 9 at the other end is hinged to the B ear hinge 14 provided in the middle of the bottom basin 5. During an earthquake, the speed lock 6 can lock the relative displacement between the upper seat plate 1 and the bottom basin 5, realizing the locking function of the spherical steel bearing, so that there is no relative displacement between the upper seat plate 1 and the bottom basin 5, so as to meet the requirement that the seismic force of the main beam can be transmitted to the pier through the upper seat plate 1, the speed lock 6 and the bottom basin 5.
[0021] The utility model meets the relative displacement requirements during the normal operation of the bearing by setting a sliding plane and a sliding spherical surface between the spherical crown liner 3, the upper seat plate 1 and the bottom basin 5, and symmetrically arranges speed locks 6 between the lower end of the upper seat plate 1 and the middle of the bottom basin 5. The lugs 9 at both ends are connected to the lower end of the upper seat plate 1 and the middle of the bottom basin 5 by lug hinges, ensuring that there is no relative displacement between the upper seat plate 1 and the bottom basin 5 when the speed lock 6 is locked, and meeting the requirement that the seismic force of the main beam under seismic action can be transmitted to the pier through the upper seat plate 1, the speed lock 6 and the bottom basin 5. The protrusion 12 at the upper end of the bottom basin 5 is stuck in the "C" - shaped notch 11 of the upper seat plate 1 and fixed at both ends by sealing plates 8, enabling the spherical steel bearing to bear tensile forces. By setting the speed lock 6 between the upper seat plate 1 and the bottom basin 5, the function of locking the spherical steel bearing under seismic action is realized. After the earthquake ends, the spherical steel bearing can return to the normal displacement working state again.
[0022] The above embodiments are only for further illustrating the present utility model and are not intended to limit the patent of the present utility model. All equivalent implementations of the present utility model should be included within the scope of the claims of the present utility model patent.
Claims
1. A speed-locking tensile spherical steel bearing, comprising a bearing composed of an upper seat plate (1), a spherical crown liner (3) and a bottom basin (5), wherein the upper seat plate (1) is a support plate provided with a "C"-shaped notch (11); the bottom basin (5) is a base with a spherical groove (13) on its top surface, and a protrusion (12) engaged with the "C"-shaped notch (11) is provided at its upper end; the spherical crown liner (3) is arranged between the upper seat plate (1) and the bottom basin (5), the protrusion (12) is clamped in the "C"-shaped notch (11), the upper seat plate (1) and the spherical crown liner (3) are in planar sliding connection, and the bottom basin (5) and the spherical crown liner (3) are in spherical sliding connection, characterized in that, The lower end of the upper seat plate (1) is provided with two speed lockers (6), which are symmetrically arranged on both sides of the middle part of the bottom basin (5); the speed lockers (6) are spherical plain bearings, and lugs (9) which are perpendicular to each other are respectively arranged at both ends thereof; the lug (9) at one end of the speed locker (6) is hinged to the A ear hinge seat (7) arranged at the lower end of the upper seat plate (1), and the lug (9) at the other end is hinged to the B ear hinge seat (14) arranged in the middle part of the bottom basin (5), so as to lock the relative displacement between the bottom basin (5) and the upper seat plate (1) of the spherical steel bearing under the action of earthquake.
2. The speed-locking type tensile ball steel bearing according to claim 1, wherein The protrusion (12) at the upper end of the bottom basin (5) is clamped in the "C"-shaped notch (11) of the upper seat plate (1), and sealing plates (8) are arranged at both ends for fixation.
3. The speed-locking tensile spherical steel bearing according to claim 1, characterized in that, A first friction pair (2) is arranged at the plane connection part between the upper seat plate (1) and the spherical crown liner (3), and a second friction pair (4) is arranged at the spherical contact part between the bottom basin (5) and the spherical crown liner (3).
4. The speed-locking tensile ball steel bearing according to claim 1, characterized in that, The gaps between the speed lockers (6) and the upper part of the bottom basin (5) in the transverse bridge direction are not less than 10 mm.
5. The speed-locking tensile spherical steel bearing according to claim 3, characterized in that, The first friction pair (2) is composed of mirror stainless steel and a modified ultra-high molecular weight polyethylene plate, and the second friction pair (4) is composed of spherical chromium plating and a modified ultra-high molecular weight polyethylene plate.
6. The speed-locking type tensile ball steel bearing according to claim 5, characterized in that, The thickness of the mirror stainless steel is not less than 2 mm, and the thickness of the spherical chromium plating is not less than 100 μm; the thickness of the modified ultra-high molecular weight polyethylene plate is not less than 7 mm, and grease storage grooves with a gap not exceeding 3 mm are arranged on the surface in contact with the spherical chromium plating; lubricating grease is arranged in the grease storage grooves.
7. The speed-locked tensile spherical steel bearing according to claim 6, characterized in that, The lubricating grease is 5201 silicone grease.