Spherical steel support with elastic displacement

Abstract

The utility model relates to the technical field of supports, and provides a spherical steel support with elastic displacement, which aims to solve the problems of large support volume, high construction difficulty, short service life of elastic elements and high cost caused by the fact that the elastic elements of an elastic displacement movable support system in the prior art generally adopt disc springs, springs and the like and are larger in appearance size. Comprising an upper support plate, a spherical crown lining plate, a lower support plate and a bottom plate which are sequentially arranged from top to bottom, the spherical crown lining plate is rotatably connected with the upper support plate, and the lower support plate is slidably connected with the bottom plate; a hydraulic spring is arranged between the lower support plate and the bottom plate, and the length direction of the hydraulic spring is in the main displacement direction of the support. The elastic reset function of the support is achieved through the hydraulic spring, the hydraulic spring is smaller in size, meanwhile, larger elastic rigidity can be met, meanwhile, the service life is longer, and the construction difficulty and the use cost can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of supports, in particular to a spherical steel support with elastic displacement. Background Art

[0002] With the increasing number of infrastructure projects, such as railways and highways, my country is seeing an increasing number of bridges spanning rivers, seas, and existing roads. This is particularly true in coastal areas, where roads and water systems are well-developed, and where medium- and long-span continuous beam bridges are prevalent. Typically, these continuous beam systems utilize a conventional "multi-vertical and transverse fixed" steel support system. When the thermal span of a bridge exceeds a certain length, displacement compensation devices are required at the beam ends to compensate for the resulting gaps. Railway bridges require a large number of rail expansion adjusters, while highway bridges require expansion joints with larger displacements. For these long-span continuous steel truss bridges, to reduce the thermal span and meet construction requirements without displacement compensation devices, an elastic movable bearing system is currently being adopted. This system eliminates longitudinal fixed bearings throughout the bridge, while conventional movable bearings are still installed at the side piers. Elastic movable bearings are used at the center piers, which transmit the braking force from the beam to the piers through static friction. Under thermal conditions, the center pier supports provide horizontal restraint through longitudinal elastic devices, thereby promoting the bridge's reverse recovery and achieving a regulated thermal span. Under seismic loads, a pier-beam fixing system is formed through longitudinal limit devices (blocks).

[0003] The elastic elements of this system usually adopt structural forms such as disc springs and springs. These structural forms have the problem of large external dimensions, which causes the support to occupy a large space and cannot meet the designed elastic displacement and elastic stiffness requirements within the limited installation space. On the premise of meeting the design indicators, the support will be larger in size, and the construction difficulty and cost will increase; and the existing elastic elements are wear parts, and their service life cannot be met. They need to be replaced regularly, and the cost accounts for a large proportion of the support cost. Utility Model Content

[0004] The utility model aims to provide a spherical steel bearing with elastic displacement to solve the problem in the prior art that the elastic elements of the elastic displacement movable bearing system usually adopt disc springs and springs, etc., which have large external dimensions, resulting in a large bearing volume, great construction difficulty, short service life of the elastic elements and high cost.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] The utility model provides a spherical steel bearing with elastic displacement, comprising an upper bearing plate, a spherical crown lining plate, a lower bearing plate and a bottom plate arranged in sequence from top to bottom, wherein the spherical crown lining plate is rotatably connected to the upper bearing plate, and the lower bearing plate is slidably connected to the bottom plate;

[0007] A hydraulic spring is provided between the lower support plate and the bottom plate, and the length direction of the hydraulic spring is along the main displacement direction of the support.

[0008] As the preferred technical solution:

[0009] The hydraulic springs are symmetrically arranged on both sides of the lower support plate in the transverse direction of the bridge.

[0010] As the preferred technical solution:

[0011] A limited stopper is provided on the bottom plate at the position where the support has maximum elastic displacement.

[0012] As the preferred technical solution:

[0013] The limit blocks are arranged along the bridge direction and on both sides of the lower support plate.

[0014] As the preferred technical solution:

[0015] The bottom plate is provided with mounting blocks, and both ends of the hydraulic spring are connected to the corresponding mounting blocks; both sides of the lower support plate are provided with clamping grooves, and the hydraulic spring is clamped in the clamping grooves.

[0016] As the preferred technical solution:

[0017] The slot is a U-shaped slot, and the opening of the U-shaped slot faces the outside of the support.

[0018] As the preferred technical solution:

[0019] The hydraulic spring includes a piston rod, a piston, a cylinder and an end cover. A piston rod is inserted into each end of the cylinder. The end of the piston rod inserted into the cylinder is connected to the piston. The two ends of the cylinder are closed by end covers, and the cylinder is filled with fluid medium.

[0020] As the preferred technical solution:

[0021] One end of the piston rod located outside the cylinder is connected to the mounting block.

[0022] As the preferred technical solution:

[0023] A metal sleeve assembly is further provided outside the piston rod, and the metal sleeve assembly is in contact with the clamping groove.

[0024] As the preferred technical solution:

[0025] The metal sleeve assembly is a stainless steel sleeve assembly.

[0026] As the preferred technical solution:

[0027] The support is a longitudinal movable support or a bidirectional movable support.

[0028] As the preferred technical solution:

[0029] When the support is a bidirectional movable support, a transverse sliding groove is provided on the mounting block, the length direction of the transverse sliding groove is along the transverse bridge direction, the end of the piston rod is inserted into the transverse sliding groove, and can slide along the transverse sliding groove.

[0030] The above structure is used to realize the lateral displacement function of the support.

[0031] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0032] The support of the utility model realizes the elastic reset function of the support through symmetrically arranged hydraulic springs. The hydraulic springs have a smaller volume while being able to meet greater elastic stiffness and have a longer service life, which can effectively reduce the construction difficulty and use cost.

[0033] The piston rod of the hydraulic spring of the utility model is connected with the installation block on the bottom plate, the structure is simple and reliable, and the disassembly and assembly are convenient, which can effectively improve the construction efficiency of the later support maintenance and hydraulic spring replacement.

[0034] During use, the bearing can adapt to temperature conditions through the elastic displacement of the hydraulic spring. Since the bridge support system is composed entirely of longitudinal movable bearings and multi-directional movable bearings, the bearing may deflect to one side during use. A limit block is set on the bottom plate at the maximum elastic displacement of the longitudinal bridge to ensure that the bearing will not deviate as a whole. More steel beam displacement can be achieved through the displacement of the bearing on the other side, ultimately ensuring that the position of the bridge is within the range allowed by the design.

[0035] For the combined working conditions of braking force and longitudinal wind force, the support overcomes the braking force and longitudinal wind force through static friction. There is no relative displacement of the pier and beam under the action of train load, thus ensuring the driving dynamic performance.

[0036] In earthquake conditions, when the relative displacement of the pier and beam is less than the design elastic displacement of the supports, the structure transmits horizontal loads through hydraulic springs, extending the seismic response period. When the relative displacement of the pier and beam exceeds the design elastic displacement of the supports, the support's limit stops constrain the beam, forming a pier-beam fixation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a structural schematic diagram along the bridge direction when the spherical steel bearing with elastic displacement described in the utility model adopts a longitudinal movable bearing.

[0038] Figure 2This is a schematic diagram of the structure in the transverse direction of the bridge when the spherical steel bearing with elastic displacement described in the utility model adopts a longitudinal movable bearing.

[0039] Figure 3 This is a structural schematic diagram along the bridge direction when the spherical steel bearing with elastic displacement described in the utility model adopts a bidirectional movable bearing.

[0040] Figure 4 This is a schematic diagram of the structure in the transverse direction of the bridge when the spherical steel bearing with elastic displacement described in the utility model adopts a bidirectional movable bearing.

[0041] Figure 5 This is a schematic diagram of the connection between the stopper and the piston rod when the spherical steel bearing with elastic displacement described in the utility model adopts a bidirectional movable bearing.

[0042] Figure 6 This is a schematic structural diagram of the hydraulic spring described in the utility model.

[0043] Icons: 1-upper support plate, 2-spherical crown lining, 3-lower support plate, 4-installation block, 401-horizontal slide, 5-hydraulic spring, 501-piston rod, 502-end cover, 503-cylinder, 504-piston, 505-plug, 506-stainless steel sleeve assembly, 507-dustproof component, 508-fluid medium, 509-end cover seal, 510-piston seal, 6-base plate, 7-anchor bolt, 8-trapezoidal guide rail, 9-limit block. DETAILED DESCRIPTION

[0044] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] Example 1

[0046] like Figure 1-Figure 5 As shown, this embodiment provides a spherical steel bearing with elastic displacement, comprising, arranged sequentially from top to bottom, an upper bearing plate 1, a spherical cap lining plate 2, and a lower bearing plate 3. The upper portion of the spherical cap lining plate 2 is spherical and rotatably connected to the upper bearing plate 1. The spherical cap lining plate 2 is mounted within the pelvic cavity of the lower bearing plate 3. The lower portion of the upper bearing plate 1 extends into the pelvic cavity of the lower bearing plate 3 and contacts the sidewalls of the pelvic cavity. The upper bearing plate 1, the spherical cap lining plate 2, and the lower bearing plate 3 together form a fixed spherical bearing, which can also meet the bearing's rotation angle requirements.

[0047] A bottom plate 6 is provided below the lower support plate 3 , and the lower support plate 3 is slidably connected to the bottom plate 6 to meet the displacement requirements of the support.

[0048] The bottom plate 6 is provided with a limit stopper 9 at the position of maximum elastic displacement of the support, and the limit stopper 9 is arranged along the bridge direction and on both sides of the lower support plate 3. The limit stopper 9 realizes the maximum longitudinal limit and prevents the bridge from deflecting.

[0049] In order to meet the displacement stiffness requirements of the support, a hydraulic spring 5 is provided between the lower support plate 3 and the base plate 6. In this embodiment, two groups of the hydraulic springs 5 ​​are symmetrically arranged on both sides of the lower support plate 3. The length direction of the hydraulic spring 5 is along the main displacement direction of the support. The hydraulic spring 5 is used to provide the elastic stiffness required by the support. The hydraulic spring 5 can be more easily retracted inward to store a larger restoring force, ensuring that the support can be smoothly reset after the force in the main displacement direction of the support disappears.

[0050] Compared with conventional elastic elements, the hydraulic spring 5 has a smaller volume while being able to meet greater elastic stiffness and having a longer service life. The use of the hydraulic spring 5 can effectively reduce construction difficulty and use costs.

[0051] like Figure 6 As shown, the hydraulic spring 5 includes a piston rod 501, an end cover 502, a cylinder 503, a piston 504, a plug 505, a stainless steel sleeve assembly 506, a dustproof component 507, a fluid medium 508, an end cover seal 509 and a piston seal 510. Specifically, one piston rod 501 is inserted into each end of the cylinder 503, and the end of the piston rod 501 inserted into the cylinder 503 (i.e., the inner end of the piston rod 501) is connected to the piston 504; the piston 504 is connected to the cylinder 503. 03; the cylinder 503 is filled with the fluid medium 508, and the plug 505 is installed on the side wall of the cylinder 503; the two ends of the cylinder 503 are respectively equipped with an end cover 502, and the end cover seal 509 is provided between the end cover 502 and the piston rod 501; the part of the piston rod 501 located outside the cylinder 503 is provided with the dust-proof component 507; the stainless steel sleeve assembly 506 is also provided outside the piston rod 501.

[0052] One end of the piston rod 501 located outside the cylinder 503 (i.e., the outer end of the piston rod 501) is connected to the mounting block 4, which is fixed to the base plate 6. Two U-shaped slots are provided on either side of the lower support plate 3, with the openings of the U-shaped slots facing outward from the support. The piston rod 501 is positioned within the U-shaped slots, and the stainless steel sleeve assembly 506 contacts the U-shaped slots, achieving linkage between the lower support plate 3 and the hydraulic spring 5, thereby providing the bridge with an elastic reset function. This simple and reliable structure, easy to assemble and disassemble, can effectively improve the efficiency of subsequent support maintenance and replacement of the hydraulic spring 5.

[0053] The support can be a longitudinal movable support or a bidirectional movable support, and the longitudinal displacement requirement of the support is achieved by the relative sliding between the lower support plate 3 and the base plate 6. When the support is a longitudinal movable support, a trapezoidal guide rail 8 is provided between the lower support plate 3 and the base plate 6. The length direction of the trapezoidal guide rail 8 is along the longitudinal direction. The trapezoidal guide rail 8 realizes the functions of longitudinal guidance and transverse limitation. The trapezoidal guide rail 8 can be a convex strip structure formed on the upper surface of the base plate 6, and a sliding groove adapted thereto is provided on the lower surface of the lower support plate 3. The length direction of the hydraulic spring 5 is along the longitudinal direction (longitudinal direction), and the hydraulic springs 5 ​​are respectively arranged on both sides of the lower support plate 3 in the transverse direction of the bridge. The hydraulic springs 5 ​​can ensure that the support can be smoothly reset after the force acting on the support along the bridge disappears. When the support is a bidirectional movable support, the lower support plate 3 and the bottom plate 6 slide freely; since the main displacement direction of the support is also longitudinal, the arrangement position of the hydraulic spring 5 is consistent with the arrangement position in the longitudinal movable support. In addition, a transverse sliding groove 401 is provided on the mounting block 4, and the length direction of the transverse sliding groove 401 is along the transverse bridge direction. The outer end of the piston rod 501 in the hydraulic spring 5 is inserted into the transverse sliding groove 401 and can slide along the transverse sliding groove 401 to realize the function of transverse displacement.

[0054] During use, the bearing provided in this embodiment can adapt to temperature conditions through the elastic displacement of the hydraulic spring 5. Since the bridge support system is entirely composed of longitudinal movable bearings and multi-directional movable bearings, the bearing may deflect to one side during use. The limit block 9 set on the base plate 6 can ensure that the bearing will not be deviated as a whole. More steel beam displacement can be achieved through the displacement of the bearing on the other side, ultimately ensuring that the position of the bridge is within the range allowed by the design.

[0055] For the combined working conditions of braking force and longitudinal wind force, the support overcomes the braking force and longitudinal wind force through static friction. There is no relative displacement of the pier and beam under the action of train load, thus ensuring the driving dynamic performance.

[0056] During earthquakes, when the relative displacement of the pier and beam is less than the design elastic displacement of the supports, the structure transmits horizontal loads via hydraulic springs 5, extending the seismic response period. When the relative displacement of the pier and beam exceeds the design elastic displacement of the supports, the support's limit stops 9 constrain the beam, forming a pier-beam fixation system.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A spherical steel bearing with elastic displacement, characterized in that: It comprises an upper support plate, a spherical crown lining plate, a lower support plate and a bottom plate which are arranged in sequence from top to bottom, wherein the spherical crown lining plate is rotatably connected to the upper support plate, and the lower support plate is slidably connected to the bottom plate; A hydraulic spring is arranged between the lower support plate and the bottom plate, and the length direction of the hydraulic spring is along the main displacement direction of the support.

2. The spherical steel support with elastic displacement according to claim 1 is characterized in that: The hydraulic springs are symmetrically arranged on both sides of the lower support plate in the transverse direction.

3. The spherical steel support with elastic displacement according to claim 1 is characterized in that: A limited stopper is arranged on the bottom plate at the position where the support has maximum elastic displacement.

4. The spherical steel support with elastic displacement according to claim 3 is characterized in that: The limit blocks are arranged on both sides of the lower support plate along the bridge direction.

5. The spherical steel support with elastic displacement according to claim 1 is characterized in that: The bottom plate is provided with mounting blocks, and the two ends of the hydraulic spring are connected to the corresponding mounting blocks; the two sides of the lower support plate are provided with clamping grooves, and the hydraulic spring is clamped in the clamping grooves.

6. The spherical steel support with elastic displacement according to claim 5 is characterized in that: The hydraulic spring includes a piston rod, a piston, a cylinder and an end cover. The two ends of the cylinder are respectively inserted with a piston rod, and one end of the piston rod inserted into the cylinder is connected to the piston. The two ends of the cylinder are closed by end covers, and the cylinder is filled with a fluid medium.

7. The spherical steel support with elastic displacement according to claim 6 is characterized in that: One end of the piston rod located outside the cylinder is connected to the mounting block.

8. The spherical steel support with elastic displacement according to claim 7 is characterized in that: A metal sleeve assembly is also arranged outside the piston rod, and the metal sleeve assembly is in contact with the clamping groove.

9. The spherical steel support with elastic displacement according to claim 7, characterized in that: The support is a longitudinal movable support or a bidirectional movable support.

10. The spherical steel support with elastic displacement according to claim 9, characterized in that: When the support is a bidirectional movable support, a transverse sliding groove is provided on the mounting block, the length direction of the transverse sliding groove is along the transverse bridge direction, the end of the piston rod is inserted into the transverse sliding groove, and can slide along the transverse sliding groove.

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